US1932795A - Corrosion resistant aluminum alloy - Google Patents
Corrosion resistant aluminum alloy Download PDFInfo
- Publication number
- US1932795A US1932795A US672353A US67235333A US1932795A US 1932795 A US1932795 A US 1932795A US 672353 A US672353 A US 672353A US 67235333 A US67235333 A US 67235333A US 1932795 A US1932795 A US 1932795A
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- US
- United States
- Prior art keywords
- corrosion resistant
- aluminum alloy
- resistant aluminum
- aluminum
- alloy
- 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
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
Description
Patented Oct. 31, 1933 CORROSION RESISTANT ALUMINUM ALLOY William E. McCullough, Detroit, Mich, assignor to Bohn Aluminum & Brass Corporation, Detroit, Mich, a corporation of Michigan No Drawing. Application May 22, 1933 Serial No. 672,353
1 Claim.
The invention relates to aluminum alloys and has for its object the obtaining of a material particularly adapted for use in forming architectural moldings which are exposed to the action of the weather. For such uses it is desirable, first, that the material should be corrosion resistant so as to retain its brightness and luster; second, that it should have sufficient physical strength to maintain its form both during the process of erection and under any stresses to which it may subsequently be exposed.
Heretofore aluminum alloys have been obtained which are highly resistant to corrosion but which are lacking in physical strength. For
instance, an alloy containing relatively small amounts of oxide free copper, such as boronized copper, silicon, cobalt and chromium, will be corrosion resistant, but will have only slightly greater strength than virgin aluminum. I have discovered that the physical properties of such material may be greatly improved by the additlon of a small amount of magnesium. Such an alloy is harder than that where the magnesium element is omitted, but it is nevertheless suitable for extrusion. By subsequent heat treatment the physical properties are further improved.
My improved alloy is of the following composition:
Balance mainly of commercial aluminum.
A specific example of the above is the following: 1
Per cent Copper- .25
Iron .57 0 Silicon .94 Cobalt .30 Chromium .73 Magnesium .51
Balance of commercial aluminum. 5
A billet of this alloy when extruded under a temperature of 930 F. through a 1 x 1 two-hole die and subsequently heat treated, shows the following characteristics:
. B.H.N. Condition g 332 332 5; 5012153.. 10
As extrudcd- 15,730 27, 21.5 as 5111's. 915 F.,alr cool 19,200 37,400 21.5 76 5hrs. 975 F., quench.. 42,600 50, 18.0 114 10 hrs. 350 F., draw" It will be noted from the above table that the physical properties are greatly improved by heat 80 treatment with air cooling, but are still further improved where after heat treatment the material is quenched and then drawn.
What I claim as my invention is:
An aluminum alloy comprising Per cent Copper .05 Chromium .75 to 1.5 Cobalt .25 to .5 Silicon .75 .to 3 9o Magnesium .5 to 1.25 Balance commercial aluminum.
W E. MCCULLOUGH.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US672353A US1932795A (en) | 1933-05-22 | 1933-05-22 | Corrosion resistant aluminum alloy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US672353A US1932795A (en) | 1933-05-22 | 1933-05-22 | Corrosion resistant aluminum alloy |
Publications (1)
Publication Number | Publication Date |
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US1932795A true US1932795A (en) | 1933-10-31 |
Family
ID=24698184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US672353A Expired - Lifetime US1932795A (en) | 1933-05-22 | 1933-05-22 | Corrosion resistant aluminum alloy |
Country Status (1)
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US (1) | US1932795A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3763686A (en) * | 1970-11-23 | 1973-10-09 | Olin Corp | Process for obtaining aluminum alloy conductor |
US3920411A (en) * | 1971-11-17 | 1975-11-18 | Southwire Co | Aluminum alloy electrical conductor and method for making same |
-
1933
- 1933-05-22 US US672353A patent/US1932795A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3763686A (en) * | 1970-11-23 | 1973-10-09 | Olin Corp | Process for obtaining aluminum alloy conductor |
US3920411A (en) * | 1971-11-17 | 1975-11-18 | Southwire Co | Aluminum alloy electrical conductor and method for making same |
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