US2523000A - Chromium nickel steels - Google Patents
Chromium nickel steels Download PDFInfo
- Publication number
- US2523000A US2523000A US93631A US9363149A US2523000A US 2523000 A US2523000 A US 2523000A US 93631 A US93631 A US 93631A US 9363149 A US9363149 A US 9363149A US 2523000 A US2523000 A US 2523000A
- Authority
- US
- United States
- Prior art keywords
- chromium
- nickel
- steels
- chromium nickel
- nickel steels
- 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
- 229910000831 Steel Inorganic materials 0.000 title description 14
- 239000010959 steel Substances 0.000 title description 14
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 title description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 13
- 239000011651 chromium Substances 0.000 claims description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- -1 ABOUT 1% COPPER Chemical compound 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 229910001220 stainless steel Inorganic materials 0.000 claims 1
- 239000010935 stainless steel Substances 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 235000005121 Sorbus torminalis Nutrition 0.000 description 1
- 244000152100 Sorbus torminalis Species 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
Definitions
- the articles obtained by means of such steels have a color which is not very agreeable and which markedly differs from that of silver or silver-plated articles.
- the present invention which has for its main object to remedy said disadvantages consists in adding copper to the chromium-nickel steel, the proportion of so added copper being near the limit of solubility of copper in said steel but not higher than said limit.
- the proportion of copper to be added is a function of the analysis of the steel. It varies according to the ratio Cr/Ni and is the It is, therefore, of about: 1% for a steel containing 18% nickel and 8% chromium, 2% for a steel containing 12% nickel and 12% chromium, 4% for asteel containing 12% nickel and 18% chromium or 8% nickel and 18% chromium; said proportions are maximum proportions.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Adornments (AREA)
Description
' higher, the higher said ratio itself.
Patented Sept. 19, 1950 CHROMIUM NICKEL STEELS Jacques Marcel Defranoux, Albertville, France,
assignor to Societc DElectro-Chimie DElectro- Metallurgie ct desAcieries Electriques DUgine, Paris, France, a corporation of France No Drawing. Application May 16, 1949, Serial N 0. 93,631. In France May 28, 1948 2 Claims.
The cold-forming and cold-working of stainless chromium-nickel steels are, though taking place mostly under comparatively satisfactory conditions, limited by the decomposition of the austenite caused by said cold-forming and coldworking. Said decomposition renders the metal hard and brittle; it is, more particularly, very difficult to subject these steels to the chequering and decorative striking operations.
Furthermore, the articles obtained by means of such steels have a color which is not very agreeable and which markedly differs from that of silver or silver-plated articles.
The present invention, which has for its main object to remedy said disadvantages consists in adding copper to the chromium-nickel steel, the proportion of so added copper being near the limit of solubility of copper in said steel but not higher than said limit.
Thus, the proportion of copper to be added is a function of the analysis of the steel. It varies according to the ratio Cr/Ni and is the It is, therefore, of about: 1% for a steel containing 18% nickel and 8% chromium, 2% for a steel containing 12% nickel and 12% chromium, 4% for asteel containing 12% nickel and 18% chromium or 8% nickel and 18% chromium; said proportions are maximum proportions.
Steels are thus obtained which are capable of being used for jewelry, decoration and domestic usesand which can be formed and worked in the cold with much less difficulty than the steels used hitherto. They are, more particularly,
comparatively easy .to roll, draw, chase, dish or chequer. ing, a color which is nearer that of silver or Furthermore, they have, after polish- 2 12% chromium, 12% nickel and 2% copper. Said steel could be rolled readily and in a perfect manner without any incident. The hot or cold. forming of said steel, more particularly its drawing, chasing or chequering could be efiected with a truly unusual easiness.
Through a cold rolling giving an elongation of 20% without any intermediary reheating a breaking strength was obtained which did not exceed -65 kg./mm.
By drawing and for a reduction of section of 40% a strength was obtained which did not exceed 88-90 kg./mm. and for a reduction of section of a strength which did not exceed -127 kg./mm.
Finally, a glazed sheet of 20/10 mm. gave on a standardized chasing test of the Erichsen type REFERENCES CITED The following references are of record in the file of this patent:
FOREIGN PATENTS Country Date Great Britain Oct. 23, 1935 OTHER REFERENCES Alloys of Iron and Chromium, High Chromium, vol. 2, pages 433 and 43 1. Edited by Kinzel and Franks. Published in 1940' by the McGraw- Hill Book Co., New York.
Number
Claims (1)
1. STAINLESS STEEL CONSISTING ESSENTIALLY OF ABOUT 18% NICKEL, ABOUT 8% CHROMIUM, ABOUT 1% COPPER, AND IRON.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2523000X | 1948-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2523000A true US2523000A (en) | 1950-09-19 |
Family
ID=9686105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US93631A Expired - Lifetime US2523000A (en) | 1948-05-28 | 1949-05-16 | Chromium nickel steels |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2523000A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2687955A (en) * | 1951-11-05 | 1954-08-31 | Armco Steel Corp | Cold-workable stainless steel and articles |
| US2697035A (en) * | 1951-12-03 | 1954-12-14 | Armco Steel Corp | Free-machining stainless steel and method |
| US2775519A (en) * | 1951-11-05 | 1956-12-25 | Armco Steel Corp | Cold-spun articles |
| US2775520A (en) * | 1951-11-05 | 1956-12-25 | Armco Steel Corp | Cold-stamped articles |
| WO2014164722A1 (en) * | 2013-03-11 | 2014-10-09 | Crs Holdings, Inc. | A ferrous alloy for coining and mehtod for producing the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB437592A (en) * | 1934-03-23 | 1935-10-23 | Alloy Res Corp | Improvements in alloys and methods of preparing the same |
-
1949
- 1949-05-16 US US93631A patent/US2523000A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB437592A (en) * | 1934-03-23 | 1935-10-23 | Alloy Res Corp | Improvements in alloys and methods of preparing the same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2687955A (en) * | 1951-11-05 | 1954-08-31 | Armco Steel Corp | Cold-workable stainless steel and articles |
| US2775519A (en) * | 1951-11-05 | 1956-12-25 | Armco Steel Corp | Cold-spun articles |
| US2775520A (en) * | 1951-11-05 | 1956-12-25 | Armco Steel Corp | Cold-stamped articles |
| US2697035A (en) * | 1951-12-03 | 1954-12-14 | Armco Steel Corp | Free-machining stainless steel and method |
| WO2014164722A1 (en) * | 2013-03-11 | 2014-10-09 | Crs Holdings, Inc. | A ferrous alloy for coining and mehtod for producing the same |
| US9351547B2 (en) | 2013-03-11 | 2016-05-31 | Crs Holdings Inc. | Ferrous alloy for coining and method for producing the same |
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