US2280173A - Aluminum alloy - Google Patents
Aluminum alloy Download PDFInfo
- Publication number
- US2280173A US2280173A US359243A US35924340A US2280173A US 2280173 A US2280173 A US 2280173A US 359243 A US359243 A US 359243A US 35924340 A US35924340 A US 35924340A US 2280173 A US2280173 A US 2280173A
- Authority
- US
- United States
- Prior art keywords
- per cent
- alloy
- tantalum
- columbium
- aluminum
- 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
Links
- 229910000838 Al alloy Inorganic materials 0.000 title description 3
- 229910045601 alloy Inorganic materials 0.000 description 42
- 239000000956 alloy Substances 0.000 description 42
- 229910052782 aluminium Inorganic materials 0.000 description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 25
- 229910052715 tantalum Inorganic materials 0.000 description 22
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 22
- 239000010955 niobium Substances 0.000 description 21
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 21
- 230000000694 effects Effects 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 9
- 229910052749 magnesium Inorganic materials 0.000 description 9
- 239000011777 magnesium Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 238000007792 addition Methods 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- 238000005266 casting Methods 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 6
- 229910001021 Ferroalloy Inorganic materials 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000004848 polyfunctional curative Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 229910052790 beryllium Inorganic materials 0.000 description 2
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical class Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 235000011167 hydrochloric acid Nutrition 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
Images
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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
Definitions
- grain size of the metal refers to the dimensions of the individual crystals which compose the metallic body.
- the grain size is usually referred to as being fine, medium, or coarse, and the shape of the grains is described as being equi-axed or elongated, depending upon the relative dimensions of the grain.
- a fine equi-axed grain size is considered to be most desirable in an alloy both from the standpoint of strength and hardness, as well as workability.
- the elements columbium and tantalum, for the purposes of my invention, are regarded as being equivalent to each other, that is, one may be substituted for the other although not necessarily in the same proportions, and therefore they constitute a group.
- these elements resemble each other in that both of them occur in the same subgroup of group V of the periodic table, both have bodycentered space lattices, and both form the same type of alloy constitutional diagram with aluminum.
- the aluminum base alloys which are particularly benefited by the addition of at least one of the elements of the columbium-tantalum group are those containing from 0.25 to 12 per cent' copper, or 0.5 to 15 per cent magnesium, or 0.25 to 14 per cent silicon, or 0.5 to 20 per cent zinc, or 0.1 to 3 per cent manganese, or combinations, of two or more of these elements; These alloys may also contain one or more of the following elements, often referred to as hardeners, in the following percentages: 0.05 to 0.5 per cent chromium, 0.01 to 0.5 per cent titanium, 0.25 to 2.5 per cent nickel, 0.01 to 0.5 per cent boron,
- I 0.002 to, 2 per cent beryllium, 0.1 to 0.5 per cent molybdenum, and 0.1 to 0.5 per cent zirconium.
- compositions wherein aluminum constitutes the balance of the alloy in each case: 1.25 per cent manganese; 2.5 per cent magnesium, -0.25 per cent chromium; 2 percent MgzSi, 0.25 per cent chromium; 4 per cent copper; per cent silicon; 5.25' percent MgZnz; 1.25 per cent magnesium, 0.5 per cent zinc, 0.15 per cent copper; and 4.4 per cent copper, 0.65 per cent manganese, 1.5 per cent magnesium.
- Fig. 1 is a photomicrograph of an as-cast alloy composed of 2.5 per cent magnesium, 0.25 per cent chromium, the balance commercially pure aluminum;
- Fig. 2 is a photomicrograph of the same alloy to which 0.03 per cent columbium had been added;
- Fig. 3 is a photomicrograph of the same alloy to which 0.06 per cent tantalum had been added.
- Fig. 4 is a photomicrograph of the same alloy to which 0.02 per cent columbium and 0.07 per cent tantalum had been added.
- the alloy employed for the test was one which is widely used in wrought form, and has a nominal composition of 2.5 per cent magnesium, 0.25 per cent chromium, and the balance aluminum containing a maximum of 0.3 per cent iron and silicon as impurities.
- a quantity of the alloy was first melted and a specimen poured at a temperature of 1350 F. into a cold, thin-walled iron mold having the shape of a frustum of an inverted cone with a diameter of about three inches at the base of the cone. About five minutes was required for the metal to completely solidify, which tended to promote the formation of large grains.
- the remaining melt was divided into three portions, 0.03 per cent columbium being added to one, 0.06 per cent tantalum being added to the second, and 0.02 per cent columbium and 0.07 per cent tantalum being added to the third.
- Speci mens were cast at a temperature of 1350f F. in the same iron mold as the alloy without the columbium or tantalum additions, the mold in each case being at room temperature, or cold, when the metal was poured into it.
- the specimens were sectioned in a vertical plane, polished, and etched in an aqueous solution of nitric and hydrochloric acids. A representative section of each specimen was then photographed at a magnification of three diameters.
- Fig. 1 the large grains of the untreated alloy may be plainly seen. Grains of this size are regarded as being too coarse for a satisfactory casting as well as promoting cracking and checking in a body that is to be subsequently worked.
- the criss-cross markings on some of the grains illustrate a common solidification phenomenon known as dendritic formation.
- the grain-refining effect of adding columbium to the alloy is seen in Fig. 2. In comparison to Fig. 1, the grains are very small and equi-axed.
- Fig. 3 the large grains of the untreated alloy may be plainly seen. Grains of this size are regarded as being too coarse for a satisfactory casting as well as promoting cracking and checking in a body that is to be subsequently worked.
- the criss-cross markings on some of the grains illustrate a common solidification phenomenon known as dendritic formation.
- the grain-refining effect of adding columbium to the alloy is seen in Fig. 2.
- the grains are very small and
- the grain size should be smaller than in Fig. 2.
- the very marked effect of both columbium and tantalum on the grain size is shown in Fig. 4.
- the grain size is so small as to be scarcely distinguishable at a magnification of three diameters, which is the same magnification that was used in the other photomicrographs.
- the tantalum and columbium may be added to molten aluminum base alloys in any convenient manner. I have found that the ferro-alloys of these two elements provide a satisfactory source.
- the ferro-alloy is preferably diluted with aluminum at a high temperature, and this diluted alloy containing, for example, 2 to 5 per cent of columbium or tantalum is used for making addi- I tions. This diluted alloy may be referred to as a hardening or rich alloy.
- the amount of tantalum and columbium used is so small, the amount of iron which is also introduced along with these elements from the ferro-alloys is likewise small and has no significant effect in the case of most alloys.
- Another advantage obtained through using the ferroalloys as a source of columbium and tantalum is that both of these elements will usually be present and therefore tend to produce an even finer structure than if only one is employed.
- aluminum base alloys herein I mean those which contain at least 50 per cent aluminum.
- aluminum as herein employed refers to the metal as commercially produced which contains impurities.
- a cast article composed of an aluminum base alloy consisting of from 0.25 to 12 per cent copper, 0.5 to 15 per cent magnesium, at'least 0.01 per cent of each of the metals tantalum and columbium, the total amount of said two metals not exceeding 0.5 per cent, and the balance aluminum.
- a cast article composed of an aluminum base alloy containing from 0.25 to 12 per cent copper, 0.5 to 15 per cent magnesium, and at least 0.01 per cent of each of the metals tantalum and columbium, the total amount of said two metals not exceeding 0.5 per cent and the balance substantially aluminum, said alloy being characterized in the as-cast condition by a finer grain size than the same alloy containing either tantalum or columbium alone.
- a cast article composed of an aluminum base alloy consisting of from 0.25 to 12 per cent copper, 0.5 to 15 per cent magnesium, and at least one of the hardeners of the group composed of 0.05 to 0.5 per cent chromium, 0.01 to 0.5 per cent titanium, 0.25 to 2.5 per cent nickel, 0.01 to 0.5 per cent boron, 0.002 to 2 per cent beryllium, 0.1 to 0.5 per cent molybdenum, and 0.1 to 0.5 percent zirconium, the total amount of said hardeners not exceeding about 3 per cent, and at least-0.01 per cent of each of the metals tantalum and columbium, the total amount of said two metals not exceeding 0.5 per cent, the balance of the alloy being aluminum.
Description
April 1942 P. T. STROUP 2,280,173
ALUMINUM ALLOY Original Filed Oct. 27, 1959 ATTORNEY of large grains.
I Patented Apr. 21, 1942 UNITED STATES PATENT OFF ICE ALUMINUM ALLOY Original application October 27, 1939, Serial No. 301,594. Divided and this application October 1, 1940, Serial No. 359,243
3 Claims.
application of my copending application, Serial No. 301,594, filed October 27, 1939.
Among the factors which affect the proper ties and behavior of both wrought and cast aluminum base alloy articles, one of the most important is the grain size of the metal. The term grain size refers to the dimensions of the individual crystals which compose the metallic body. The grain size is usually referred to as being fine, medium, or coarse, and the shape of the grains is described as being equi-axed or elongated, depending upon the relative dimensions of the grain. Generally, a fine equi-axed grain size is considered to be most desirable in an alloy both from the standpoint of strength and hardness, as well as workability. Since some aluminum base alloys do not inherently exhibit a small grain size in the as-cast condition, and, furthermore, since thermal conditions during solidification of the molten metal exercise such a great influence upon the size of grains, it is necessary to exercise some control' of the alloy composition or freezing conditions in order to insure a uniform structure in the product. This need is most apparent in the case of ingots and other castings which have cross sections of considerable thickness, becausethe slow cooling tends to promote the development A satisfactory means for controlling the size of grains in aluminum base alloy castings should possess the following characteristics: (1) convenience in application; (2) uniformity in effect; and (3) a minimum of undesired effect on other important properties.
It is the principal object of my invention to provide a simple means for producing smallequiaxed grains in cast aluminum base alloys. Another object is to provide a means for effecting this control of grain size which has the abovementioned characteristics. These and other objects will become apparent from the following description of my invention.
I have discovered that the addition of small amounts of one or both of the elements, columbium and tantalum, to aluminum base alloys produces a small grain size in the as-cast product. While the presence of either element alone in an alloy has a pronounced effect upon the grain size, an even greater effect is obtained if both elements are present. As far as I have observed, the addition of these elements to aluminum base alloys does not adversely affect other propertiesv which are generally desired, such as hardness, strength, ductility, workability, and resistance to corrosion. I have also observed that the grainreflning effect obtained through the addition of these elements is substantially uniform throughout the entire article. This uniformity in effect is particularly advantageous in the casting of ingots or other articlesof relatively large cross sectional dimension.
The benefit derived from adding columbium and/or tantalum to aluminum base alloys as mentioned hereinabove is particularly evident in the reduction of the grain size of the as-cast metal. However, the addition of these elements may also have other beneficial effects both in the casting and in the wrought product made from the cast article. By emphasizing the effect upon the grain size of the cast alloys, I do not which to minimize any advantages gained in other respects.
Only relatively small amounts of columbian and tantalum are required to produce a fine grain, size in castings, from 0.01 to 0.1 per cent of either one generally being suflici'ent for the purpose. In certain cases it may be necessary to employ even more, but in no event should the amount exceed 0.5 per cent, and preferably not over 0.4. per cent. Although either element'is effective when usedseparately, I have foundthat an even more pronounced grain-refining effect is obtained if both are simultaneously employed. In such a case the total amount should not be less than about 0.02 per cent, nor should it exceed about 0.5 per cent.
. The elements columbium and tantalum, for the purposes of my invention, are regarded as being equivalent to each other, that is, one may be substituted for the other although not necessarily in the same proportions, and therefore they constitute a group. In addition to having a similar grain refining effect on aluminum base alloys, these elements resemble each other in that both of them occur in the same subgroup of group V of the periodic table, both have bodycentered space lattices, and both form the same type of alloy constitutional diagram with aluminum.
The aluminum base alloys which are particularly benefited by the addition of at least one of the elements of the columbium-tantalum group are those containing from 0.25 to 12 per cent' copper, or 0.5 to 15 per cent magnesium, or 0.25 to 14 per cent silicon, or 0.5 to 20 per cent zinc, or 0.1 to 3 per cent manganese, or combinations, of two or more of these elements; These alloys may also contain one or more of the following elements, often referred to as hardeners, in the following percentages: 0.05 to 0.5 per cent chromium, 0.01 to 0.5 per cent titanium, 0.25 to 2.5 per cent nickel, 0.01 to 0.5 per cent boron,
I 0.002 to, 2 per cent beryllium, 0.1 to 0.5 per cent molybdenum, and 0.1 to 0.5 per cent zirconium. The total amount of the latter elements, however, should not exceed about 3 per cent. As
exemplary of the variety of alloys whose grain size has been found to be reduced by the addition of columbium and/or tantalum, the following compositions are cited, wherein aluminum constitutes the balance of the alloy in each case: 1.25 per cent manganese; 2.5 per cent magnesium, -0.25 per cent chromium; 2 percent MgzSi, 0.25 per cent chromium; 4 per cent copper; per cent silicon; 5.25' percent MgZnz; 1.25 per cent magnesium, 0.5 per cent zinc, 0.15 per cent copper; and 4.4 per cent copper, 0.65 per cent manganese, 1.5 per cent magnesium.
The effect of adding columbium or tantalum, or both elements, to a particular alloy is illustrated in the accompanying figures, where Fig. 1 is a photomicrograph of an as-cast alloy composed of 2.5 per cent magnesium, 0.25 per cent chromium, the balance commercially pure aluminum;
Fig. 2 is a photomicrograph of the same alloy to which 0.03 per cent columbium had been added;
Fig. 3 is a photomicrograph of the same alloy to which 0.06 per cent tantalum had been added; and
Fig. 4 is a photomicrograph of the same alloy to which 0.02 per cent columbium and 0.07 per cent tantalum had been added.
The alloy employed for the test was one which is widely used in wrought form, and has a nominal composition of 2.5 per cent magnesium, 0.25 per cent chromium, and the balance aluminum containing a maximum of 0.3 per cent iron and silicon as impurities. A quantity of the alloy was first melted and a specimen poured at a temperature of 1350 F. into a cold, thin-walled iron mold having the shape of a frustum of an inverted cone with a diameter of about three inches at the base of the cone. About five minutes was required for the metal to completely solidify, which tended to promote the formation of large grains. The remaining melt was divided into three portions, 0.03 per cent columbium being added to one, 0.06 per cent tantalum being added to the second, and 0.02 per cent columbium and 0.07 per cent tantalum being added to the third. Speci mens were cast at a temperature of 1350f F. in the same iron mold as the alloy without the columbium or tantalum additions, the mold in each case being at room temperature, or cold, when the metal was poured into it. The specimens were sectioned in a vertical plane, polished, and etched in an aqueous solution of nitric and hydrochloric acids. A representative section of each specimen was then photographed at a magnification of three diameters.
In Fig. 1 the large grains of the untreated alloy may be plainly seen. Grains of this size are regarded as being too coarse for a satisfactory casting as well as promoting cracking and checking in a body that is to be subsequently worked. The criss-cross markings on some of the grains illustrate a common solidification phenomenon known as dendritic formation. The grain-refining effect of adding columbium to the alloy is seen in Fig. 2. In comparison to Fig. 1, the grains are very small and equi-axed. In Fig. 3, the
grain size of the alloy to which tantalum had been added may be seen. Since 0.06 per cent tantalum was employed, as compared to 0.03 per cent columbium in the preceding example, it
is not surprising that the grain size should be smaller than in Fig. 2. The very marked effect of both columbium and tantalum on the grain size is shown in Fig. 4. The grain size is so small as to be scarcely distinguishable at a magnification of three diameters, which is the same magnification that was used in the other photomicrographs.
The tantalum and columbium may be added to molten aluminum base alloys in any convenient manner. I have found that the ferro-alloys of these two elements provide a satisfactory source. The ferro-alloy is preferably diluted with aluminum at a high temperature, and this diluted alloy containing, for example, 2 to 5 per cent of columbium or tantalum is used for making addi- I tions. This diluted alloy may be referred to as a hardening or rich alloy. Generally speaking, since the amount of tantalum and columbium used is so small, the amount of iron which is also introduced along with these elements from the ferro-alloys is likewise small and has no significant effect in the case of most alloys. Another advantage obtained through using the ferroalloys as a source of columbium and tantalum is that both of these elements will usually be present and therefore tend to produce an even finer structure than if only one is employed.
In referring to aluminum base alloys herein, I mean those which contain at least 50 per cent aluminum. The term aluminum as herein employed refers to the metal as commercially produced which contains impurities.
Where, in the appended claims, the balance of an alloy is said to be substantially aluminum, it is intended that this expression shall permit the inclusion in the alloy composition of one or more of the hardening elements mentioned hereinabove as well as the usual impurities.
I claim:
1'. A cast article composed of an aluminum base alloy consisting of from 0.25 to 12 per cent copper, 0.5 to 15 per cent magnesium, at'least 0.01 per cent of each of the metals tantalum and columbium, the total amount of said two metals not exceeding 0.5 per cent, and the balance aluminum.
2. A cast article composed of an aluminum base alloy containing from 0.25 to 12 per cent copper, 0.5 to 15 per cent magnesium, and at least 0.01 per cent of each of the metals tantalum and columbium, the total amount of said two metals not exceeding 0.5 per cent and the balance substantially aluminum, said alloy being characterized in the as-cast condition by a finer grain size than the same alloy containing either tantalum or columbium alone.
3. A cast article composed of an aluminum base alloy consisting of from 0.25 to 12 per cent copper, 0.5 to 15 per cent magnesium, and at least one of the hardeners of the group composed of 0.05 to 0.5 per cent chromium, 0.01 to 0.5 per cent titanium, 0.25 to 2.5 per cent nickel, 0.01 to 0.5 per cent boron, 0.002 to 2 per cent beryllium, 0.1 to 0.5 per cent molybdenum, and 0.1 to 0.5 percent zirconium, the total amount of said hardeners not exceeding about 3 per cent, and at least-0.01 per cent of each of the metals tantalum and columbium, the total amount of said two metals not exceeding 0.5 per cent, the balance of the alloy being aluminum.
PHILIP T. STROUP.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US359243A US2280173A (en) | 1939-10-27 | 1940-10-01 | Aluminum alloy |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US301594A US2226594A (en) | 1939-10-27 | 1939-10-27 | Aluminum alloy |
US359243A US2280173A (en) | 1939-10-27 | 1940-10-01 | Aluminum alloy |
Publications (1)
Publication Number | Publication Date |
---|---|
US2280173A true US2280173A (en) | 1942-04-21 |
Family
ID=26972474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US359243A Expired - Lifetime US2280173A (en) | 1939-10-27 | 1940-10-01 | Aluminum alloy |
Country Status (1)
Country | Link |
---|---|
US (1) | US2280173A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3259973A (en) * | 1963-03-11 | 1966-07-12 | Eutectic Welding Alloys | Method, filler alloy and flux for brazing |
DE2235168A1 (en) * | 1971-07-20 | 1973-02-01 | British Aluminium Co Ltd | ALUMINUM ALLOYS, METHOD OF MANUFACTURING AND USING THEREOF |
-
1940
- 1940-10-01 US US359243A patent/US2280173A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3259973A (en) * | 1963-03-11 | 1966-07-12 | Eutectic Welding Alloys | Method, filler alloy and flux for brazing |
DE2235168A1 (en) * | 1971-07-20 | 1973-02-01 | British Aluminium Co Ltd | ALUMINUM ALLOYS, METHOD OF MANUFACTURING AND USING THEREOF |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3925067A (en) | High strength aluminum base casting alloys possessing improved machinability | |
US3765877A (en) | High strength aluminum base alloy | |
US2280170A (en) | Aluminum alloy | |
US2290016A (en) | Aluminum alloy | |
US2188203A (en) | Aluminum base alloy | |
US3392015A (en) | Aluminum-base alloy for use at elevated temperatures | |
US2280174A (en) | Aluminum alloy | |
US2185348A (en) | Aluminum base alloy | |
US2226594A (en) | Aluminum alloy | |
US2280173A (en) | Aluminum alloy | |
US2280175A (en) | Aluminum alloy | |
US2280176A (en) | Aluminum alloy | |
US2280169A (en) | Aluminum alloy | |
US2280177A (en) | Aluminum alloy | |
US2683661A (en) | Fine grain iron and method of production | |
US2683662A (en) | Manufacture of iron and steel and products obtained | |
US2280178A (en) | Aluminum alloy | |
US2280171A (en) | Aluminum alloy | |
US2280172A (en) | Aluminum alloy | |
US3033676A (en) | Nickel-containing inoculant | |
US2908566A (en) | Aluminum base alloy | |
US2013870A (en) | Die casting metal alloys | |
US2219056A (en) | Magnesium base alloy | |
US2795501A (en) | Copper base alloys | |
US3369893A (en) | Copper-zinc alloys |