US3502448A - Aluminum alloy sheet - Google Patents

Aluminum alloy sheet Download PDF

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Publication number
US3502448A
US3502448A US688740A US3502448DA US3502448A US 3502448 A US3502448 A US 3502448A US 688740 A US688740 A US 688740A US 3502448D A US3502448D A US 3502448DA US 3502448 A US3502448 A US 3502448A
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US
United States
Prior art keywords
sheet
strength
aluminum alloy
inch
alloy sheet
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Expired - Lifetime
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US688740A
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English (en)
Inventor
William A Anderson
John K Mcbride
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Alcoa Corp
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Aluminum Company of America
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Application filed by Aluminum Company of America filed Critical Aluminum Company of America
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Publication of US3502448A publication Critical patent/US3502448A/en
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    • 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
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • 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

Definitions

  • the extra hard temper is achieved by cold rolling to effect a reduction in thickness of at least 85% BACKGROUND OF THE INVENTION
  • aluminum alloy sheet has found increasing acceptance in applications involving its use as an end on a can, or the like, for beverages, food and other goods.
  • These can ends usually include some sort of easy open feature such as the integral drawn rivet pull tab feature described in U.S. Patent 3,191,797.
  • This type of feature is one of the prime reasons for the increasingly widespread use of aluminumsheet in can ends but also creates certain problems in selecting a ⁇ suitable material.
  • the can end must have suicient strength to safely contain the material within the can, and this strength must be retained after exposures to the baking temperatures employed in curing the coatings applied to the can ends.
  • the material must be suiciently workable to be fashioned into an integral rivet easy open type can end.
  • U.S. Patent 3,191,797 it becomes immediately apparent that a can end is subjected to a rather substantial deformation in forming the integral rivet employed to secure the easy open tab to the can end.
  • several aluminum alloy sheet compositions might have suiicient strength before andl after any -baking operations, many lack the required formability.
  • Work hardened aluminum-magnesium-manganese alloy sheet as provided herein has a thickness of 0.008 to 0.017 inch and is composed of an alloy consisting essentially of 4 to 5.5% magnesium, 0.2 to 0.7% manganese, the balance being aluminum and incidental elements and impurities.
  • the maximum amounts of impurities in the alloy are as follows: 0.2% copper, 0.4% iron, 0.3% silicon, 0.1% titanium, 0.2% chromium, all other impurities being limited to 0.05% each and a total of 0.15%. It is 3,502,448 Patented Mar. 24, 1970 ICC Percent Mur-1.700 0.9 (1n percent Mg) i0.15%
  • the sheet For the sheet to perform as desired, it is essential that it be in the state resulting from a cold rolling reduction of at least of the thickness of material in the recrystallized state to provide an extra hard internal structure.
  • the sheet Iin this state exhibits tensile and yield strengths of, respectively, 57,000 p.s.i. and 53,000 p.s.i., an elongation, 2 inches, of 3% or more together with an Olsen cupping value of 0.14 inch.
  • the sheet l is characterized by tensile and yieldvstrengths olf, respectively, 53,000 and 45,000 p.s.i., an elongation of 8 and an Olsen cupping value of 0.16 inch.
  • composition limits mentioned in the preceding paragraph must be closely followed in order to achieve the combination of strength and workability required which characterizes the improved sheet.
  • the formability falls below that at which integral rivet easy open can ends can be consistently manufactured on a commercial scale. If it falls below that established by the equation, the strength is decreased below the level contemplated by the invention.
  • the alloy composition as set forth herein may be provided as a continuous cast ingot.
  • the ingot may be homogenized by heating for about 24 hours at a temperature of at least 800 F. but below the melting point.
  • the ingot is then prepared for rolling and hot rolled to some intermediate thickness, usually about 0.15 inch, according to conventional hot rolling practice and may then be annealed by heating to about 600 F. -for a period of time ysuicient to recrystallize the internal structure.
  • this material iscold rolled to effect a reduction in thickness of at least 85%, and preferably 90% or more to provide sheet ranging in thickness, 0.008 to 0.015 inch.
  • the temperature of the sheet as it leaves the rolls not exceed 200 F.
  • the pressure deflection characteristic In addition to standard tensile tests, another measure of the strength capacity of a sheet to serve as a can end is the pressure deflection characteristic. This characteristic is determined by providing a beverage can with its end fashioned from the sheet being tested. Pressure is applied within the can and gradually increased until the can end buckles and plastically deforms. The pressureat which the can end buckles is then designated as the buckle pressure. In bucklingl tests comparing sheets A and B, it has been found that 0.0135 inch thick can ends of sheet A withstand the same pressure as 0.0145 inch thick can ends of sheet B, which is the sheet currently employed widely in easy open beer can ends. This represents a rather signi'iicant savings in material.
  • the improved sheet provides a useful new material for use in integral rivet easy open type can ends. It demonstrates a clear improvement in combining workability and strength such that such can ends can now be fashioned from a substantially thinner sheet gauge.
  • the balance being aluminum and impurities, the maximum amounts of said impurities being as follows: 0.2% copper, 0.4% iron, 0.3% silicon, 0.1% titanium, 0.2% chromium, all other impurities being limited to 0.05% each and a total of 0.15%, said sheet being characterized in said extra hard condition by a tensile strength of 57,000 p.s.i., a yield strength of 53,000 p.s.i. and an elongation, in 2 inches of 3%, together with an Olsen cupping value of 0.14 inch and further characterized after an exposure of -up to 20 minutes to a temperature of up to 400 F. by a tensile strength of 53,000 p.s.i., a yield strength of 45,000 p.s.i., an elongation of 8% and an Olsen cupping value of 0.16 inch.
  • the sheet in accordance with claim 1 which has received a cold reduction of at least 3.
  • the sheet in accordance with claim 1 which contains 4.2 to 4.8% magnesium and 0.25 to 0.5% manganese.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Steel (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US688740A 1967-12-07 1967-12-07 Aluminum alloy sheet Expired - Lifetime US3502448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68874067A 1967-12-07 1967-12-07

Publications (1)

Publication Number Publication Date
US3502448A true US3502448A (en) 1970-03-24

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US688740A Expired - Lifetime US3502448A (en) 1967-12-07 1967-12-07 Aluminum alloy sheet

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US (1) US3502448A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5248088B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1813192B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1214370A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6817578A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3661657A (en) * 1970-12-07 1972-05-09 Kaiser Aluminium Chem Corp Method for making aluminum sheet
US3691972A (en) * 1970-07-09 1972-09-19 Reynolds Metals Co Aluminous metal articles and method
US3857973A (en) * 1971-03-12 1974-12-31 Aluminum Co Of America Aluminum alloy container end and sealed container thereof
US3963143A (en) * 1975-06-30 1976-06-15 Aluminum Company Of America Container including an aluminum panel having a portion removable by tearing
US4035201A (en) * 1975-06-30 1977-07-12 Aluminum Company Of America Method of making a container including an aluminum panel having a portion removable by tearing
US4043840A (en) * 1976-07-09 1977-08-23 Swiss Aluminium Ltd. Aluminum alloys possessing improved resistance weldability
US4111721A (en) * 1976-06-14 1978-09-05 American Can Company Strip cast aluminum heat treatment
US4269632A (en) * 1978-08-04 1981-05-26 Coors Container Company Fabrication of aluminum alloy sheet from scrap aluminum for container components
US4284437A (en) * 1979-12-18 1981-08-18 Sumitomo Light Metal Industries, Ltd. Process for preparing hard tempered aluminum alloy sheet
US4469537A (en) * 1983-06-27 1984-09-04 Reynolds Metals Company Aluminum armor plate system
US4582541A (en) * 1982-12-16 1986-04-15 Swiss Aluminium Ltd. Process for producing strip suitable for can lid manufacture
US4626294A (en) * 1985-05-28 1986-12-02 Aluminum Company Of America Lightweight armor plate and method
WO1996026299A1 (fr) * 1995-02-24 1996-08-29 Pechiney Rhenalu PRODUIT POUR CONSTRUCTION SOUDEE EN ALLIAGE AlMgMn A RESISTANCE MECANIQUE AMELIOREE
FR2731018A1 (fr) * 1995-02-24 1996-08-30 Pechiney Rhenalu Tole pour construction soudee en alliage almgmn a resistance mecanique amelioree
EP0769564A1 (fr) * 1995-10-18 1997-04-23 Pechiney Rhenalu Alliages AlMg pour constructions soudées à caractéristiques mécaniques améliorées
US5908518A (en) * 1996-08-06 1999-06-01 Pechiney Rhenalu AlMgMn alloy product for welded construction with improved corrosion resistance
CN1051945C (zh) * 1992-12-28 2000-05-03 凯泽铝和化学公司 两阶段联机作业制造罐体片材的方法
US6102102A (en) * 1992-06-23 2000-08-15 Kaiser Aluminum & Chemical Corporation Method and apparatus for continuous casting of metals
US6238495B1 (en) 1996-04-04 2001-05-29 Corus Aluminium Walzprodukte Gmbh Aluminium-magnesium alloy plate or extrusion
US6485682B1 (en) * 2000-11-06 2002-11-26 Dieter Backhaus Hardened aluminum alloy for use in the manufacture of printed circuit boards

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0267793U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1988-11-07 1990-05-22

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601206A (en) * 1948-10-22 1952-06-17 Reynolds Metals Co Medium-strength corrosion-resistant aluminum alloys
US3187428A (en) * 1960-10-19 1965-06-08 Reynolds Metals Co Method of treating aluminum and aluminum alloys preparatory to bright finishing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601206A (en) * 1948-10-22 1952-06-17 Reynolds Metals Co Medium-strength corrosion-resistant aluminum alloys
US3187428A (en) * 1960-10-19 1965-06-08 Reynolds Metals Co Method of treating aluminum and aluminum alloys preparatory to bright finishing

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3691972A (en) * 1970-07-09 1972-09-19 Reynolds Metals Co Aluminous metal articles and method
US3661657A (en) * 1970-12-07 1972-05-09 Kaiser Aluminium Chem Corp Method for making aluminum sheet
US3857973A (en) * 1971-03-12 1974-12-31 Aluminum Co Of America Aluminum alloy container end and sealed container thereof
US3963143A (en) * 1975-06-30 1976-06-15 Aluminum Company Of America Container including an aluminum panel having a portion removable by tearing
US4035201A (en) * 1975-06-30 1977-07-12 Aluminum Company Of America Method of making a container including an aluminum panel having a portion removable by tearing
US4111721A (en) * 1976-06-14 1978-09-05 American Can Company Strip cast aluminum heat treatment
US4043840A (en) * 1976-07-09 1977-08-23 Swiss Aluminium Ltd. Aluminum alloys possessing improved resistance weldability
US4269632A (en) * 1978-08-04 1981-05-26 Coors Container Company Fabrication of aluminum alloy sheet from scrap aluminum for container components
US4284437A (en) * 1979-12-18 1981-08-18 Sumitomo Light Metal Industries, Ltd. Process for preparing hard tempered aluminum alloy sheet
US4582541A (en) * 1982-12-16 1986-04-15 Swiss Aluminium Ltd. Process for producing strip suitable for can lid manufacture
US4469537A (en) * 1983-06-27 1984-09-04 Reynolds Metals Company Aluminum armor plate system
US4626294A (en) * 1985-05-28 1986-12-02 Aluminum Company Of America Lightweight armor plate and method
US6102102A (en) * 1992-06-23 2000-08-15 Kaiser Aluminum & Chemical Corporation Method and apparatus for continuous casting of metals
CN1051945C (zh) * 1992-12-28 2000-05-03 凯泽铝和化学公司 两阶段联机作业制造罐体片材的方法
WO1996026299A1 (fr) * 1995-02-24 1996-08-29 Pechiney Rhenalu PRODUIT POUR CONSTRUCTION SOUDEE EN ALLIAGE AlMgMn A RESISTANCE MECANIQUE AMELIOREE
FR2731018A1 (fr) * 1995-02-24 1996-08-30 Pechiney Rhenalu Tole pour construction soudee en alliage almgmn a resistance mecanique amelioree
EP0769564A1 (fr) * 1995-10-18 1997-04-23 Pechiney Rhenalu Alliages AlMg pour constructions soudées à caractéristiques mécaniques améliorées
FR2740144A1 (fr) * 1995-10-18 1997-04-25 Pechiney Rhenalu Alliage almg pour constructions soudees a caracteristiques mecaniques ameliorees
EP1178125A3 (fr) * 1995-10-18 2009-04-01 Alcan Rhenalu Alliage AlMg pour constructions soudées à caractéristiques mécaniques améliorées
US6238495B1 (en) 1996-04-04 2001-05-29 Corus Aluminium Walzprodukte Gmbh Aluminium-magnesium alloy plate or extrusion
US6342113B2 (en) 1996-04-04 2002-01-29 Corus Aluminium Walzprodukte Gmbh Aluminum-magnesium alloy plate or extrusion
US5908518A (en) * 1996-08-06 1999-06-01 Pechiney Rhenalu AlMgMn alloy product for welded construction with improved corrosion resistance
US6485682B1 (en) * 2000-11-06 2002-11-26 Dieter Backhaus Hardened aluminum alloy for use in the manufacture of printed circuit boards

Also Published As

Publication number Publication date
DE1813192A1 (de) 1971-02-11
NL6817578A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1969-06-10
DE1813192B2 (de) 1973-11-15
JPS5248088B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-12-07
GB1214370A (en) 1970-12-02

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