US3911819A - Aluminum alloys for long run printing plates - Google Patents

Aluminum alloys for long run printing plates Download PDF

Info

Publication number
US3911819A
US3911819A US451795A US45179574A US3911819A US 3911819 A US3911819 A US 3911819A US 451795 A US451795 A US 451795A US 45179574 A US45179574 A US 45179574A US 3911819 A US3911819 A US 3911819A
Authority
US
United States
Prior art keywords
printing plate
lithographic printing
alloy
plate according
copper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US451795A
Inventor
Michael J Pryor
James A Ford
Sheldon W Dean
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcan Holdings Switzerland AG
Original Assignee
Alusuisse Holdings AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alusuisse Holdings AG filed Critical Alusuisse Holdings AG
Priority to US451795A priority Critical patent/US3911819A/en
Priority to AR258019A priority patent/AR207139A1/en
Priority to US05/545,070 priority patent/US3944439A/en
Priority to CA222,112A priority patent/CA1044922A/en
Priority to GB10679/75A priority patent/GB1489452A/en
Priority to SE7502997A priority patent/SE413599B/en
Priority to AU79140/75A priority patent/AU498293B2/en
Priority to BE154386A priority patent/BE826751A/en
Priority to BR1558/75A priority patent/BR7501558A/en
Priority to IT21402/75A priority patent/IT1034395B/en
Priority to CH340475A priority patent/CH615461A5/de
Priority to FR7508448A priority patent/FR2264885B1/fr
Priority to NL7503213A priority patent/NL7503213A/xx
Priority to JP50032842A priority patent/JPS50157212A/ja
Priority to DE2511831A priority patent/DE2511831C2/en
Priority to ZA00751664A priority patent/ZA751664B/en
Priority to LU72072A priority patent/LU72072A1/xx
Application granted granted Critical
Publication of US3911819A publication Critical patent/US3911819A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/926—Thickness of individual layer specified
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12736—Al-base component
    • Y10T428/1275—Next to Group VIII or IB metal-base component

Definitions

  • Offset lithography is a widely used printing process which utilizes a printing plate which has been treated so that certain portions of the plate are water receptive and other portions of the plate are receptive to an oil base ink.
  • the printing process consists of first applying water to the sheet and then an oil base ink. After the alternate application of water and ink the aluminum sheet is then placed in contact with a rubber roll and a portion of the ink on the aluminum sheet is transferred to the rubber roll. The rubber roll is then placed in contact with a sheet of paper and the image which results on the paper is directly related to the original surface condition of the aluminum sheet.
  • the aluminum sheet is usually prepared through the use ofa photographic process.
  • a photosensitive polymer is applied to the surface of the sheet and a pattern of light corresponding to the desired printed image is caused to impinge on the photosensitive polymer.
  • a developer removes all the photosensitive polymer which was not exposed to light. Because of surface tension effects the oil base ink will adhere to the areas where the photosensitive polymer remains and the water will adhere to areas where the original surface of the aluminum sheet is exposed. Large numbers of copies may be made from one printing plate, sometimes in excess of one million. Because the resultant printed image depends on the surface condition of the aluminum sheet, it is highly important that the original surface of the sheet be smooth, flat and free from defects.
  • Aluminum alloys are widely used in the production of printing plates for use in offset lithography. Difficulties are encountered when aluminum alloy printing plates are used in extremely long production runs. These difficulties include fatigue cracking of the alloys and excessive wear of the alloy. These problems of low fatigue strength and excessive wear are both related to the inability of the alloy to further work ha'rden in service. Commonly used aluminum alloys, Aluminum Association designation 3003 and 1100 have a fatigue strength in hard tempers of about 10,000 psi at five hundred million reversals.
  • the preceeding difficulties may be largely overcome through the use of the alloy of the present invention.
  • the alloy of the present invention has a fatigue strength of between 13,000 and 15,000 psi and a tensile strength of about 25,000 psi. When used in a partially annealed condition, these strengths may be obtained while the alloy retains sufficient work hardening capabilities so as to minimize wear.
  • the alloy of the present invention contains from 0.2 to 0.75% magnesium, from 0.45 to 0.7% copper, from 0.1 to 0.7% iron and up to 0.3% silicon, balance essentially aluminum.
  • This alloy in the partially annealed condition possesses a moderate tensile strength of about 25,000 psi. The tensile strength is comparable to DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • the composition of the present invention is given in weight percent in the following description unless otherwise specified.
  • the essential components of the alloy are magnesium, copper, iron and silicon.
  • the other components listed in Table I may be present in concentrations up to those listed in the Table without adverse effect.
  • Titanium may be present as a purposeful addition for the purposes of grain refinement.
  • any of the foregoing non-essential elements may be present in levels as low as 0.001%.
  • the alloying elements of the present alloy have been selected so that the resultant alloy in its final condition has a minimum of alloying elements present out of solid solution.
  • Table 11 lists the approximate solid solubility of the alloying additions of the present invention at a temperature of 625F. This temperature was chosen since it is representative of the final full annealing temperature disclosed in the present application. Also shown in Table II are the approximate percentages of alloying elements of the present invention out of solution under the worst possible condition which is when the alloying elements are present in their maximum amounts. The sum of the alloying elements out of solution at 625F is seen to be less than 0.9%.
  • the alloying composition of the present invention is preferably chosen to have a maximum amount of alloying additions out of solution to be less than 0.9% and most preferably less than 0.7%. The alloying composition must, of course, still fall within the limits set forth in Table I.
  • EXAMPLE 1 A series of alloys containing various amounts of magnesium, copper and silicon were cast for evaluation. The composition of the ingots is given in Table 111, along with the details of the initial homogenization given the ingots. The ingots were hot rolled from 1.5
  • the alloys of the present invention have average fatigue strengths on the order of 14,000 psi whereas conventional alloys used for the fabrication of lithography plates and listed in Table 111 have fatigue strengths on the order of 10 ksi.
  • the improvement in fatigue strength is achieved without significant change in other mechanical properties.
  • the yield strength and ultimate tensile strength of the alloys of the present invention are slightly higher than the conventional alloys, while the elongation of the present alloys is somewhat less than the elongation of the commercial alloys tested.
  • the yield strength may be controlled by controlling the final partial anneal.
  • the data in Table 111 indicates the importance of the final partial anneal in achieving superior fatigue strength.
  • the alloy identified as 26 has a fatigue strength of 13 ksi in the non-partially annealed condition and a fatigue strength of 15.7 ksi after the partial anneal, an improvement of 13.7%.
  • the partial anneal also increased the elongation, which is a measure of residual work hardened capacity, from 2.0 to 5.5%.
  • the yield strength was not significantly affected by the stabilization while the ultimate tensile strength was only slightly increased (35,000 psi).
  • the partial anneal plays an important role in producing material having a high fatigue strength.
  • the partial anneal conditions were selected to provide a yield strength of approximately 25,000 ksi. Material having a yield strength of 25,000 ksi may readily be fabricated using conventional commercial techniques.
  • the final cold reduction should be at least 6.
  • the final partial anneal should be performed so that the resultant material has a 0.2% offset yield strength of between 22 and 28,000 psi. in general, the final anneal will be performed at temperatures between 250 and 500F for times of between 1 minute and 4 hours.
  • the resultant aluminum alloy is characterized by having a non-recrystallized grain structure, a yield strength of between 22 and 28,000 psi.
  • the elongation of the resultant alloy is preferably at least 5%.
  • the aluminum alloy of the present invention treated according to the process of the present invention has superior fatigue properties and is highly suited for use in the production of long run aluminum lithography printing plates.
  • a layer of electroplated copper to the surface of the aluminum printing plate so as to provide a wear resistant surface.
  • the alloy of the present invention can be easily plated with copper and the resulting copper plated surface is free from defects.
  • the thickness of the copper plate layer will generally fall between 0.0005 and 0.005 inch and may be applied by any of several well known conventional techniques.
  • a lithographic printing plate having high fatigue strength suitable for long run printing plates made of an aluminum base alloy consisting essentially of from 0.2 to 0.75% magnesium, from 0.45 to 0.7% copper, from 0.1 to 0.7% iron, and the balance aluminum.
  • a lithographic printing plate according to claim 1 having a maximum of 0.9% of material out of solid solution.
  • a lithographic printing plate according to claim 2 having a maximum of 0.7% of material out of solid solution.
  • a lithographic printing plate according to claim 2 containing from 0.4 to 0.6% magnesium.
  • a lithographic printing plate according to claim 2 containing from 0.5 to 0.6% copper.
  • a lithographic printing plate according to claim 2 containing from 0.4 to 0.65% iron.
  • a lithographic printing plate according to claim 2 including a layer of electroplated copper on the surface thereof, wherein said layer has a thickness from 0.0005 to 0.005 inch.
  • a lithographic printing plate having high fatigue strength suitable for long run printing plates made of an aluminum base alloy consisting essentially of from 0.2 to 0.75% magnesium, from 0.45 to 0.7% copper, from 0.1 to 0.7% iron, from 0.001 to 0.3% silicon, from 0.001 to 0.05% manganese, from 0.001 to 0.05% zinc, from 0.001 to 0.03% titanium, from 0.001 to 0.05% chromium, from 0.001 to 0.02% boron, balance aluminum, wherein said alloy contains a maximum of 0.9% material out of solid solution.
  • a lithographic printing plate according to claim 8 containing from 0.0075 to 0.015% titanium and from 0.005 to 0.0l5% boron.

Abstract

The present invention consists of an aluminum alloy having a high fatigue strength which is particularly suited for use in the fabrication of printing plates for offset lithography. The alloy contains from 0.2 to 0.75% magnesium, from 0.45 to 0.7% copper, from 0.1 to 0.7% iron and up to 0.3% silicon. The alloy, when processed according to the process of the present invention possesses a uniquely high fatigue strength.

Description

I Umted States Patent 11 1 [111 3,911,819
Pryor et a1. Oct. 14, 1975 [54] ALUIVIINUM ALLOYS FOR LONG RUN 3,676,1 11 7/1972 Wieser et a1. 75/141 PRINTING PLATES [75] Inventors: Michael J. Pryor, Woodbridge; P i E i r R, Dean James Ford, North Haven; Attorney, Agent, or Firm-Robert 1-1. Bachman; David Sheldon W. Dean, Hamden, all of A J k Conn.
[73] Assignee: Swiss Aluminium Ltd., Chippis,
Switzerland 57 ABSTRACT [22] Filed: Mar. 18, 1974 The present invention conslsts of an aluminum alloy PP bio-14511795 having a high fatigue strength which is particularly suited for use in the fabrication of printing plates for 52 us. c1. 101/459; 29/191; 29/197; Offset ithc'graphy- The fmm 75/14 75/142 4 /32 0.75% magnesium, from 0.45 to 0.7% copper, from 51 Int. c1. .1 B41N 1/08 07% and 03% The [58] Field of Search 75 /1 41 101/459 when processed according to the process of the pres- 29/197 5. 2 ent invention possesses a uniquely high fatigue 7 v strength. [56] References Cited 9 Claims, No Drawings ALUMINUM ALLOYS FOR LONG RUN PRINTING PLATES BACKGROUND OF THE INVENTION Offset lithography is a widely used printing process which utilizes a printing plate which has been treated so that certain portions of the plate are water receptive and other portions of the plate are receptive to an oil base ink. The printing process consists of first applying water to the sheet and then an oil base ink. After the alternate application of water and ink the aluminum sheet is then placed in contact with a rubber roll and a portion of the ink on the aluminum sheet is transferred to the rubber roll. The rubber roll is then placed in contact with a sheet of paper and the image which results on the paper is directly related to the original surface condition of the aluminum sheet. The aluminum sheet is usually prepared through the use ofa photographic process. In one variation of this process, a photosensitive polymer is applied to the surface of the sheet and a pattern of light corresponding to the desired printed image is caused to impinge on the photosensitive polymer. Subsequently, a developer removes all the photosensitive polymer which was not exposed to light. Because of surface tension effects the oil base ink will adhere to the areas where the photosensitive polymer remains and the water will adhere to areas where the original surface of the aluminum sheet is exposed. Large numbers of copies may be made from one printing plate, sometimes in excess of one million. Because the resultant printed image depends on the surface condition of the aluminum sheet, it is highly important that the original surface of the sheet be smooth, flat and free from defects.
Aluminum alloys are widely used in the production of printing plates for use in offset lithography. Difficulties are encountered when aluminum alloy printing plates are used in extremely long production runs. These difficulties include fatigue cracking of the alloys and excessive wear of the alloy. These problems of low fatigue strength and excessive wear are both related to the inability of the alloy to further work ha'rden in service. Commonly used aluminum alloys, Aluminum Association designation 3003 and 1100 have a fatigue strength in hard tempers of about 10,000 psi at five hundred million reversals.
These problems cannot be solved by the substitution of higher strength aluminum alloys because present commercial processes cannot produce material having the required width, flatness and surface finish in alloys having a tensile strength in excess of 35,000 psi.
The preceeding difficulties may be largely overcome through the use of the alloy of the present invention. The alloy of the present invention has a fatigue strength of between 13,000 and 15,000 psi and a tensile strength of about 25,000 psi. When used in a partially annealed condition, these strengths may be obtained while the alloy retains sufficient work hardening capabilities so as to minimize wear.
SUMMARY OF THE INVENTION The alloy of the present invention contains from 0.2 to 0.75% magnesium, from 0.45 to 0.7% copper, from 0.1 to 0.7% iron and up to 0.3% silicon, balance essentially aluminum. This alloy in the partially annealed condition possesses a moderate tensile strength of about 25,000 psi. The tensile strength is comparable to DESCRIPTION OF THE PREFERRED EMBODIMENTS The composition of the present invention is given in weight percent in the following description unless otherwise specified.
The broad and preferred composition limits for the alloy of the present invention are'given in Table I below:
TABLE I Broad Preferred Magnesium .2 .75 .4 .6 Copper .45 .7 .5 .6 Iron .l .7 .4 .65
Silicon 0 .3
Manganese 0 .05 0 0.5 Zinc 0 .05 0 05 Titanium 0 .03 .0075 015 Chromium 0 .05 0 .05
Boron 0 .02 005 .0l5
The essential components of the alloy are magnesium, copper, iron and silicon. The other components listed in Table I may be present in concentrations up to those listed in the Table without adverse effect. Titanium may be present as a purposeful addition for the purposes of grain refinement. Naturally, any of the foregoing non-essential elements may be present in levels as low as 0.001%.
The alloying elements of the present alloy have been selected so that the resultant alloy in its final condition has a minimum of alloying elements present out of solid solution. Table 11 lists the approximate solid solubility of the alloying additions of the present invention at a temperature of 625F. This temperature was chosen since it is representative of the final full annealing temperature disclosed in the present application. Also shown in Table II are the approximate percentages of alloying elements of the present invention out of solution under the worst possible condition which is when the alloying elements are present in their maximum amounts. The sum of the alloying elements out of solution at 625F is seen to be less than 0.9%. The alloying composition of the present invention is preferably chosen to have a maximum amount of alloying additions out of solution to be less than 0.9% and most preferably less than 0.7%. The alloying composition must, of course, still fall within the limits set forth in Table I.
TABLE 11 gage material and a 30% reduction for the 0.043 inch gage material. As a final anneal the alloys received a Solubilit Max. out of in 5 salmon in partial anneal as described in Table 111.
at 625F Max. Allowed in Present Alloy Element (approx.) Present Alloy at 625 F EXAMPLE [1 Mg 8.0 75 g: 8 E8 The alloys prepared in Example 1 were evaluated for Si mechanical properties, yield strength, ultimate tensile Mn strength and elongation. The results are listed in Table '8, :8; B 10 Ill. The alloys were also tested for fatigue strength and Cr .01 .05 .04 for the fatigue strength listed in Table 111 is the stress B in ksi which the alloy withstood for 10" cycles.
TABLE 11] Controlled Heating & Final Limit Cooling Analyzed lnter- Rcduet. 10 Alloy mediate "/1 CW to Partial YS UT Cycles Mg Cu Other ldent Homog. Anncal- 0.030" Anncal ksi ksi '7( E ksi ing .86 .48 .25 Si 11A H 950/12-16 hrs. No 50 425/1 hr. 25.0 29.3 6.0 14.3 .86 .48 .25 Si 118 H 950/12-16 hrs. No 275/1 hr. 25.7 28.7 3.0 13.0 .35 .46 .11 Si 12A H 950/12-16 hrs. No 50 275/1 hr. 26.1 28.5 4.0 13.4 .35 .46 .11 Si 12B H 950/12-16 hrsv No 30 No 244 24.7 2.0 13.0 .76 .56 .11 Si 18 H 10501 100/12 hrs.C No 50 295/11 hrs. 28.1 31.9 4.7 14.1 .63 .38 .09 Si 20 H 1050-1100/12 hrs.C No 50 405/1 k hrs. 24.2 28.5 5.5 14.0 .69 .54 .10 Si 22 No No 50 295/1 hrs. 26.3 30.6 4.2 14.9 .45 .54 .10 Si 26A H 1050-1100/12 hrs.C Yes 50 No 26.3 26.6 2.0 13.8 .45 .54 .10 Si 26B H 1050-1100/12 hrs.C Yes 50 H 295/3 hrs.C 25.2 29.8 5.5 15.7 1 2 .06 .2 Si 5050H36* H 1050-1100/12 hrs.C Yes 50 295/3 hrs. 23.2 26.0 4.0 11+ .15 1.2 Mn 3003-Hl6 H 1100-1150/8 hrs.C No 50 No 250 27.9 3.5 11.6
.2 Si 16% Clad 5050-H36(0.01 l Not Known Yes 21.4 24.7 5.9 11.2 Bare 1100Hl6 (0.011) Not Known No 20.7 21.5 4.2 9.1
H 50lhr. heat to temperature C 50/hr. cool from temperature 10% Clad with 1145 alloy.
"Passed at 11 ksi and failed at 4 X l0 at 12 ksi.
The present invention will be made more clear through reference to the following illustrative examples.
EXAMPLE 1 A series of alloys containing various amounts of magnesium, copper and silicon were cast for evaluation. The composition of the ingots is given in Table 111, along with the details of the initial homogenization given the ingots. The ingots were hot rolled from 1.5
inches to a final gage of 0.2 inches at a temperature of 825F. The ingots were reheated for 5 minutes after each 0.1 inch reduction. The ingots were then cold rolled from 0.2 to 0.1 inch using a reduction of about 10% per pass. The cold rolled ingots were then annealed for 3 hours at 625F. Some of the ingots received controlled heating and cooling at a rate of 25F/hr. before and after this anneal to simulate commercial large coil practice. Those ingots which received controlled cooling and heating are designated in Table 111.
1t is noteworthy that the alloys of the present invention have average fatigue strengths on the order of 14,000 psi whereas conventional alloys used for the fabrication of lithography plates and listed in Table 111 have fatigue strengths on the order of 10 ksi. The improvement in fatigue strength is achieved without significant change in other mechanical properties. The yield strength and ultimate tensile strength of the alloys of the present invention are slightly higher than the conventional alloys, while the elongation of the present alloys is somewhat less than the elongation of the commercial alloys tested. The yield strength may be controlled by controlling the final partial anneal. The data in Table 111 indicates the importance of the final partial anneal in achieving superior fatigue strength. For example, the alloy identified as 26 has a fatigue strength of 13 ksi in the non-partially annealed condition and a fatigue strength of 15.7 ksi after the partial anneal, an improvement of 13.7%. The partial anneal also increased the elongation, which is a measure of residual work hardened capacity, from 2.0 to 5.5%. The yield strength was not significantly affected by the stabilization while the ultimate tensile strength was only slightly increased (35,000 psi). Thus, it can be seen that the partial anneal plays an important role in producing material having a high fatigue strength. The partial anneal conditions were selected to provide a yield strength of approximately 25,000 ksi. Material having a yield strength of 25,000 ksi may readily be fabricated using conventional commercial techniques.
EXAMPLE Ill The samples of Alloys 12A, 12B, 26A and 268 were further evaluated for suitability for use in lithography plates by fabricating the lithographic printing plates from these alloys. The evaluation of the resultant printed images indicated that the alloys were highly suited for the fabrication of printing plates. The printed image was extremely sharp and there was no evidence of defects caused by the surface condition of the alloy.
in summary, the process which is preferred for preparation of the alloys of the present invention consists of the following steps:
1. Cast the alloy useing conventional processes such as used for the casting of 1100 type alloys. Titanium may be added for grain refinement in the amounts listed in Table l.
2. Homogenize at a temperature of between 900 and 1150F for a time of between 2 and 24 hours. Care must be taken to avoid exceeding the solidus temperature which is dependent on the exact composition of the alloy.
3. Hot roll at a temperature between 750 and 900F.
4. Cold roll and anneal to penultimate gage. Intermediate anneals should be performed at temperatures between 600 and 750F for periods from 1 minute to 6 hours.
5. The final cold reduction should be at least 6. The final partial anneal should be performed so that the resultant material has a 0.2% offset yield strength of between 22 and 28,000 psi. in general, the final anneal will be performed at temperatures between 250 and 500F for times of between 1 minute and 4 hours.
The resultant aluminum alloy is characterized by having a non-recrystallized grain structure, a yield strength of between 22 and 28,000 psi. The elongation of the resultant alloy is preferably at least 5%.
The aluminum alloy of the present invention treated according to the process of the present invention has superior fatigue properties and is highly suited for use in the production of long run aluminum lithography printing plates. For extremely long run printing plates it is common commercial practice to apply a layer of electroplated copper to the surface of the aluminum printing plate so as to provide a wear resistant surface. The alloy of the present invention can be easily plated with copper and the resulting copper plated surface is free from defects. The thickness of the copper plate layer will generally fall between 0.0005 and 0.005 inch and may be applied by any of several well known conventional techniques.
This invention may be embodied in other forms or carried out in other ways without departing from the spirit or essential characteristics thereof. The present embodiment is therefore to be considered as in all respects illustrative and not restrictive, the scope of the invention being indicated by the appended claims, and all changes which come within the meaning and range of equivalency are intended to be embraced therein.
What is claimed is:
l. A lithographic printing plate having high fatigue strength suitable for long run printing plates made of an aluminum base alloy consisting essentially of from 0.2 to 0.75% magnesium, from 0.45 to 0.7% copper, from 0.1 to 0.7% iron, and the balance aluminum.
2. A lithographic printing plate according to claim 1 having a maximum of 0.9% of material out of solid solution.
3. A lithographic printing plate according to claim 2 having a maximum of 0.7% of material out of solid solution.
4. A lithographic printing plate according to claim 2 containing from 0.4 to 0.6% magnesium.
5. A lithographic printing plate according to claim 2 containing from 0.5 to 0.6% copper.
6. A lithographic printing plate according to claim 2 containing from 0.4 to 0.65% iron.
7. A lithographic printing plate according to claim 2 including a layer of electroplated copper on the surface thereof, wherein said layer has a thickness from 0.0005 to 0.005 inch.
8. A lithographic printing plate having high fatigue strength suitable for long run printing plates made of an aluminum base alloy consisting essentially of from 0.2 to 0.75% magnesium, from 0.45 to 0.7% copper, from 0.1 to 0.7% iron, from 0.001 to 0.3% silicon, from 0.001 to 0.05% manganese, from 0.001 to 0.05% zinc, from 0.001 to 0.03% titanium, from 0.001 to 0.05% chromium, from 0.001 to 0.02% boron, balance aluminum, wherein said alloy contains a maximum of 0.9% material out of solid solution.
9. A lithographic printing plate according to claim 8 containing from 0.0075 to 0.015% titanium and from 0.005 to 0.0l5% boron.

Claims (9)

1. A LITHOGRAPHIC PRINTING PLATE HAVING HIGH FATIGUE STRENGTH SUITABLE FORMING RUN PRINTING PLATES MADE OF AN ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF FROM 0.2 TO 0.75% MAGNESIUM, FROM 0.45 TO 0.7, COPPER, FROM 0.1 TO 0.7% IRON, AND THE BALANCE ALUMINUM.
2. A lithographic printing plate according to claim 1 having a maximum of 0.9% of material out of solid solution.
3. A lithographic printing plate according to claim 2 having a maximum of 0.7% of material out of solid solution.
4. A lithographic printing plate according to claim 2 containing from 0.4 to 0.6% magnesium.
5. A lithographic printing plate according to claim 2 containing from 0.5 to 0.6% copper.
6. A lithographic printing plate according to claim 2 containing from 0.4 to 0.65% iron.
7. A lithographic printing plate according to claim 2 including a layer of electroplated copper on the surface thereof, wherein said layer has a thickness from 0.0005 to 0.005 inch.
8. A lithographic printing plate having high fatigue strength suitable for long run printing plates made of an aluminum base alloy consisting essentially of from 0.2 to 0.75% magnesium, from 0.45 to 0.7% copper, from 0.1 to 0.7% iron, from 0.001 to 0.3% silicon, from 0.001 to 0.05% manganese, from 0.001 to 0.05% zinc, from 0.001 to 0.03% titanium, from 0.001 to 0.05% chromium, from 0.001 to 0.02% boron, balance aluminum, wherein said alloy contains a maximum of 0.9% material out of solid solution.
9. A lithographic printing plate according to claim 8 containing from 0.0075 to 0.015% titanium and from 0.005 to 0.015% boron.
US451795A 1974-03-18 1974-03-18 Aluminum alloys for long run printing plates Expired - Lifetime US3911819A (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
US451795A US3911819A (en) 1974-03-18 1974-03-18 Aluminum alloys for long run printing plates
AR258019A AR207139A1 (en) 1974-03-18 1975-01-01 A LITHOGRAPHIC PRINTER PLATE AND METHOD FOR ITS PREPARATION
US05/545,070 US3944439A (en) 1974-03-18 1975-01-29 Method of preparing high fatigue strength aluminum alloy
GB10679/75A GB1489452A (en) 1974-03-18 1975-03-14 Aluminium alloys for long run printing plates
CA222,112A CA1044922A (en) 1974-03-18 1975-03-14 Aluminum alloys for long run printing plates
AU79140/75A AU498293B2 (en) 1974-03-18 1975-03-17 Aluminium lithographic plate
BE154386A BE826751A (en) 1974-03-18 1975-03-17 ALUMINUM ALLOYS FOR LONG-LIFE PRINTING PLATES
BR1558/75A BR7501558A (en) 1974-03-18 1975-03-17 PLATE FOR LITOGRAPHIC PRINTING
SE7502997A SE413599B (en) 1974-03-18 1975-03-17 ALUMINUM Alloy for offset printing plates and sets
CH340475A CH615461A5 (en) 1974-03-18 1975-03-18
FR7508448A FR2264885B1 (en) 1974-03-18 1975-03-18
NL7503213A NL7503213A (en) 1974-03-18 1975-03-18
JP50032842A JPS50157212A (en) 1974-03-18 1975-03-18
DE2511831A DE2511831C2 (en) 1974-03-18 1975-03-18 Use of an aluminum alloy
IT21402/75A IT1034395B (en) 1974-03-18 1975-03-18 ALUMINUM ALLOYS FOR LONG-LIFE PRINT PLATES
ZA00751664A ZA751664B (en) 1974-03-18 1975-03-18 Aluminium alloys for long run printing plates
LU72072A LU72072A1 (en) 1974-03-18 1975-03-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US451795A US3911819A (en) 1974-03-18 1974-03-18 Aluminum alloys for long run printing plates

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/545,070 Division US3944439A (en) 1974-03-18 1975-01-29 Method of preparing high fatigue strength aluminum alloy

Publications (1)

Publication Number Publication Date
US3911819A true US3911819A (en) 1975-10-14

Family

ID=23793716

Family Applications (1)

Application Number Title Priority Date Filing Date
US451795A Expired - Lifetime US3911819A (en) 1974-03-18 1974-03-18 Aluminum alloys for long run printing plates

Country Status (16)

Country Link
US (1) US3911819A (en)
JP (1) JPS50157212A (en)
AR (1) AR207139A1 (en)
AU (1) AU498293B2 (en)
BE (1) BE826751A (en)
BR (1) BR7501558A (en)
CA (1) CA1044922A (en)
CH (1) CH615461A5 (en)
DE (1) DE2511831C2 (en)
FR (1) FR2264885B1 (en)
GB (1) GB1489452A (en)
IT (1) IT1034395B (en)
LU (1) LU72072A1 (en)
NL (1) NL7503213A (en)
SE (1) SE413599B (en)
ZA (1) ZA751664B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4151896A (en) * 1977-02-02 1979-05-01 Societe De Vente De L'aluminium Pechiney Method of producing machine wire by continuous casting and rolling
US4435230A (en) 1981-09-03 1984-03-06 Furukawa Aluminum Co., Ltd. Aluminum alloy printing plate and method for manufacturing same
US4702981A (en) * 1983-04-18 1987-10-27 Canon Kabushiki Kaisha Photoconductive member and support for said photoconductive member
US4729939A (en) * 1985-07-25 1988-03-08 Nippon Light Metal Company Limited Aluminum alloy support for lithographic printing plates
US4945004A (en) * 1987-04-28 1990-07-31 Hoechst Ag Base material for an aluminum offset printing plate
US6447982B1 (en) 1999-07-02 2002-09-10 Vaw Aluminium Ag Litho strip and method for its manufacture
US20030148607A1 (en) * 2001-04-23 2003-08-07 Hiroshi Yamada Metallic film forming method and semiconductor device manufacturing method
US20040079457A1 (en) * 2002-03-01 2004-04-29 Showa Denko K.K. Al-Mg-Si series alloy plate, method for manufacturing the same and Al-Mg-Si series alloy material
USRE40788E1 (en) * 1999-07-02 2009-06-23 Hydro Aluminium Deutschland Gmbh Litho strip and method for its manufacture

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS581047A (en) * 1981-06-05 1983-01-06 Fuji Photo Film Co Ltd Backing for lithographic printing plate of aluminum alloy
JPS59220396A (en) * 1983-05-30 1984-12-11 Fuji Photo Film Co Ltd Aluminum alloy plate for base for planographic printing plate and said base
IT1163803B (en) * 1983-07-19 1987-04-08 Italia Alluminio ALUMINUM ALLOY FOR VEHICLE STRUCTURAL SHAPED ELEMENTS AND PROCEDURE FOR OBTAINING THESE ELEMENTS
JPH07100844B2 (en) * 1985-10-04 1995-11-01 日本軽金属株式会社 Method for manufacturing aluminum alloy support for offset printing
US4818300A (en) * 1986-12-08 1989-04-04 Aluminum Company Of America Method for making lithoplate
WO1991014794A1 (en) * 1990-03-27 1991-10-03 Alcan International Limited Improved aluminum alloy

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113052A (en) * 1960-07-05 1963-12-03 Aluminum Co Of America Method of making aluminum base alloy extruded product
US3676111A (en) * 1971-03-01 1972-07-11 Olin Corp Method of grain refining aluminum base alloys

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490955A (en) * 1967-01-23 1970-01-20 Olin Mathieson Aluminum base alloys and process for obtaining same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3113052A (en) * 1960-07-05 1963-12-03 Aluminum Co Of America Method of making aluminum base alloy extruded product
US3676111A (en) * 1971-03-01 1972-07-11 Olin Corp Method of grain refining aluminum base alloys

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4151896A (en) * 1977-02-02 1979-05-01 Societe De Vente De L'aluminium Pechiney Method of producing machine wire by continuous casting and rolling
US4435230A (en) 1981-09-03 1984-03-06 Furukawa Aluminum Co., Ltd. Aluminum alloy printing plate and method for manufacturing same
US4702981A (en) * 1983-04-18 1987-10-27 Canon Kabushiki Kaisha Photoconductive member and support for said photoconductive member
US4876185A (en) * 1983-04-18 1989-10-24 Canon Kabushiki Kaisha Aluminum support for a photoconductive member
US4729939A (en) * 1985-07-25 1988-03-08 Nippon Light Metal Company Limited Aluminum alloy support for lithographic printing plates
US4945004A (en) * 1987-04-28 1990-07-31 Hoechst Ag Base material for an aluminum offset printing plate
US5009722A (en) * 1987-04-28 1991-04-23 Hoechst Ag Process for producing base material for an aluminum offset printing plate
USRE40788E1 (en) * 1999-07-02 2009-06-23 Hydro Aluminium Deutschland Gmbh Litho strip and method for its manufacture
US6447982B1 (en) 1999-07-02 2002-09-10 Vaw Aluminium Ag Litho strip and method for its manufacture
DE19956692B4 (en) 1999-07-02 2019-04-04 Hydro Aluminium Deutschland Gmbh litho
US20030148607A1 (en) * 2001-04-23 2003-08-07 Hiroshi Yamada Metallic film forming method and semiconductor device manufacturing method
US6767822B2 (en) * 2001-04-23 2004-07-27 Sony Corporation Method of forming metallic film and method of producing semiconductor system
EP1482065A1 (en) * 2002-03-01 2004-12-01 Showa Denko K.K. PROCESS FOR PRODUCING Al-Mg-Si ALLOY PLATE, Al-Mg-Si ALLOY PLATE AND Al-Mg-Si ALLOY MATERIAL
EP1482065A4 (en) * 2002-03-01 2005-06-01 Showa Denko Kk PROCESS FOR PRODUCING Al-Mg-Si ALLOY PLATE, Al-Mg-Si ALLOY PLATE AND Al-Mg-Si ALLOY MATERIAL
US7189294B2 (en) 2002-03-01 2007-03-13 Showa Denko K.K. Al-Mg-Si series alloy plate, method for manufacturing the same and Al-Mg-Si series alloy material
EP2184375A1 (en) * 2002-03-01 2010-05-12 Showa Denko Kabushiki Kaisha Al-Mg-Si alloy material and plate
US20040079457A1 (en) * 2002-03-01 2004-04-29 Showa Denko K.K. Al-Mg-Si series alloy plate, method for manufacturing the same and Al-Mg-Si series alloy material

Also Published As

Publication number Publication date
NL7503213A (en) 1975-09-22
CA1044922A (en) 1978-12-26
LU72072A1 (en) 1975-08-20
SE7502997L (en) 1975-09-19
DE2511831C2 (en) 1985-01-31
IT1034395B (en) 1979-09-10
AR207139A1 (en) 1976-09-15
CH615461A5 (en) 1980-01-31
GB1489452A (en) 1977-10-19
AU498293B2 (en) 1979-03-01
BE826751A (en) 1975-07-16
BR7501558A (en) 1975-12-23
FR2264885A1 (en) 1975-10-17
ZA751664B (en) 1976-02-25
FR2264885B1 (en) 1981-06-26
SE413599B (en) 1980-06-09
DE2511831A1 (en) 1975-09-25
AU7914075A (en) 1976-09-23
JPS50157212A (en) 1975-12-19

Similar Documents

Publication Publication Date Title
US3911819A (en) Aluminum alloys for long run printing plates
KR910001490B1 (en) Copper alloy having an improved combination of strenth and conductivity and the process for making
US5888320A (en) Aluminum alloy having improved damage tolerant characteristics
DE3612675C3 (en) Use of hypereutectic aluminum-silicon alloy for engine blocks
US4388270A (en) Rhenium-bearing copper-nickel-tin alloys
KR970059292A (en) Lithographic plate aluminum alloy sheet and its manufacturing method
US4305762A (en) Copper base alloy and method for obtaining same
EP0480402A1 (en) Process for manufacturing aluminium alloy material with excellent formability, shape fixability and bake hardenability
US3944439A (en) Method of preparing high fatigue strength aluminum alloy
US3880678A (en) Processing copper base alloy
US3941620A (en) Method of processing copper base alloys
JP6954722B2 (en) Aluminum alloy material and its manufacturing method
EP0293176B1 (en) Photosensitive drums
US4180398A (en) Modification of leaded brasses to improve hot workability
US4231817A (en) Extruded corrosion resistant structural aluminum alloy
US5110371A (en) Aluminum alloys for forming colored anodic oxide films thereon and method for producing a sheet material of the alloy
US4284429A (en) Aluminum base casting alloy
DE3544632A1 (en) ALUMINUM-BASED ALLOY FOR THE HEAD ROLLER OF VIDEO CASSETTE RECORDS, METHOD FOR THEIR PRODUCTION AND THE HEAD ROLLER MADE THEREOF
US3386820A (en) Aluminum base alloy containing zirconium-chromium-manganese
JPS60215726A (en) Blank aluminum alloy plate for printing
JPH05271834A (en) Aluminum alloy having stable artificial ageing characteristic
JPS6244548A (en) Wear resistant aluminum alloy having superior cold workability
JP3225604B2 (en) Method for producing intermetallic compound precipitation-strengthened Ni-Cr-Mo-based alloy cast member having excellent corrosion resistance
JPH04246148A (en) Rolled aluminum alloy sheet excellent in formability and its manufacture
JPH03294445A (en) High strength aluminum alloy having good formability and its manufacture