Claims
- 1. An annealed, austenitic stainless steel wrought product formed from a stainless steel exhibiting no galling at stress of 63 ksi when rotated against itself in the form of button and block specimens in accordance with the test method described herein, said steel consisting essentially of, in weight percent, from about 12% to about 19% chromium, from about 4% to about 12% nickel, from about 7% to about 13% manganese, from about 3% to about 5% silicon, from about 0.01% to about 0.12% carbon, from about 0.03% to about 0.3% nitrogen, about 0.75% maximum molybdenum, about 0.75% maximum copper, about 0.09% maximum phosphorus, about 0.05% maximum sulfur, and remainder essentially iron, said product having a low shear strength oxide film containing silicon formed in air at ordinary temperatures, the nickel content being varied directly in proportion to the silicon content in such manner as to assure an austenitic structure.
- 2. The product of claim 1, consisting essentially of from about 15% to about 17% chromium, from about 6% to about 10% nickel, from about 7.5% to about 8.5% manganese, from about 3.7% to about 4.2% silicon, form about 0.05% to about 0.10% carbon, from about 0.10% to about 0.20% nitrogen, about 0.5% maximum molybdenum, about 0.5% maximum copper, about 0.07% maximum phosphorus, about 0.03% maximum sulfur, and remainder essentially iron.
- 3. An austenitic stainless steel fabricated article formed from an annealed stainless steel exhibiting no galling at a stress of 63 ksi when rotated against itself in the form of button and block specimens in accordance with the test method described herein, said steel consisting essentially of, in weight percent, from about 12% to about 19% chromium, from about 4% to about 12% nickel, from about 7% to about 13% manganese, from about 3% to about 5% silicon, from about 0.01% to about 0.12% carbon, from about 0.03% to about 0.3% nitrogen, about 0.75% maximum molybdenum, about 0.75% maximum copper, about 0.09% maximum phosphorus, about 0.05% maximum sulfur, and remainder essentially iron, said article having a low shear strength oxide film containing silicon formed in air at ordinary temperatures, the nickel content being varied directly in proportion to the silicon content in such manner as to assure an austenitic structure.
- 4. The article claimed in claim 3, consisting essentially of from about 15% to about 17% chromium, from about 6% to about 10% nickel, from about 7.5% to about 8.5% manganese, from about 3.7% to about 4.2% silicon, from about 0.05% to about 0.10% carbon, from about 0.10% to about 0.20% nitrogen, about 0.5% maximum molybdenum, about 0.5% maximum copper, about 0.07% maximum phosphorus, about 0.03% maximum sulfur, and remainder essentially iron.
Parent Case Info
This is a division of application Ser. No. 360,402 filed May 14, 1973 now U.S. Pat. No. 3,912,503.
US Referenced Citations (9)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1,950,932 |
Feb 1971 |
DT |
1,202,479 |
Aug 1970 |
UK |
Divisions (1)
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Number |
Date |
Country |
Parent |
360402 |
May 1973 |
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