USRE36382EExpiredUtility

Precipitation hardenable martensitic stainless steel

65
Assignee: SANDVIK ABPriority: Oct 7, 1991Filed: Oct 2, 1992Granted: Nov 9, 1999
Est. expiryOct 7, 2011(expired)· nominal 20-yr term from priority
Inventors:Anna Hultin-Stigenberg
C22C 38/52C22C 38/44C22C 38/50C22C 38/42
65
PatentIndex Score
17
Cited by
8
References
21
Claims

Abstract

Precipitation hardenable martensitic stainless steel of high strength combined with high ductility. The Iron-based steel comprises of about 10 to 14% chromium, about 7 to 11% nickel, about 0.5 to 6% molybdenum, up to 9% cobalt, about 0.5% to 4% copper, about 0.4 to 1.4% titanium, about 0.05 to 0.6% aluminium, carbon and nitrogen not exceeding 0.05% with iron as the remainder and all other elements of the periodic table not exceeding 0.5%.

Claims

exact text as granted — not AI-modified
I claim: 
     
       1. A precipitation hardenable martensitic stainless steel alloy consisting essentially of, in per cent by weight: about 10% to 14% chromium,   about 7% to 10% nickel,   about 0.5% to 6% molybdenum,   up to about 9% cobalt,   about 0.5% to 4% copper,   about 0.05% to 0.5% aluminium,   about 0.4% to 1.4% titanium,   not exceeding 0.03% carbon and nitrogen,   the content of tantalum, niobium, vanadium and tungsten being at most 0.1%,   with iron as the remainder and the total content, consisting essentially of silicon, manganese and any other element of the periodic table, not exceeding 0.3%.   
     
     
       2. The alloy of claim 1 wherein the amount of cobalt is up to about 6%. 
     
     
       3. The alloy of claim 1 wherein the amount of copper is about 0.5% to 3%. 
     
     
       4. The alloy of claim 1 wherein the amount of molybdenum is between about 0.5% to 4.5%. 
     
     
       5. The alloy of claim 1 wherein the amount of copper is between about 0.5% to 2.5%. 
     
     
       6. The alloy of claim 1 wherein the alloy is used in the manufacture of medical and dental applications. 
     
     
       7. The alloy of claim 1 wherein the alloy is used in the manufacture of spring applications. 
     
     
       8. The alloy of claim 1 wherein the alloy is used in the production of wire in sizes less than φ15 mm. 
     
     
       9. The alloy of claim 1 wherein the alloy is used in the production of bars in sizes less than φ70 mm. 
     
     
       10. The alloy of claim 1 wherein the alloy is used in the production of strips in sizes with thickness less than 10 mm. 
     
     
       11. The alloy of claim 1 wherein the alloy is used in the production of tubes in sizes with outer diameter less than 450 mm and wall-thickness less than 100 mm. 
     
     
       12. The alloy of claim 2 wherein the amount of copper is about 0.5% to 3%. 
     
     
       13. The alloy of claim 2 wherein the amount of molybdenum is between about 0.5% to 4.5%. 
     
     
       14. The alloy of claim 3 wherein the amount of molybdenum is between about 0.5% to 4.5%. 
     
     
       15. The alloy of claim 12 wherein the amount of molybdenum is between about 0.5% to 4.5%. 
     
     
       16. The alloy of claim 2 wherein the amount of copper is between 0.5% to 2.5%. 
     
     
       17. The alloy of claim 3 wherein the amount of copper is between 0.5% to 2.5%. 
     
     
       18. The alloy of claim 4 wherein the amount of copper is between 0.5% to 2.5%. 
     
     
       19. The alloy of claim 12 wherein the amount of copper is between 0.5% to 2.5%. 
     
     
       20. The alloy of claim 15 wherein the amount of copper is between 0.5% to 2.5%. .Iadd. 
     
     
       21.  A precipitation hardenable, martensitic stainless steel alloy consisting essentially of, in percent by weight: about 10% to 14% chromium,   about 7% to 10% nickel,   about 0.5% to 6% molybdenum,   up to about 9% cobalt,   about 0.5% to 4% copper,   about 0.05% to 0.5% aluminum,   about 0.4% to 1.4% titanium,   not exceeding 0.03% carbon and nitrogen,   the content of tantalum, niobium, vanadium, and tungsten being at most 0.1%,   with iron as the remainder and the total content, consisting essentially of silicon, manganese and any other element of the periodic table, not exceeding 0.4%. .Iaddend..Iadd.22. The alloy of claim 21 wherein the amount of cobalt is up to about 6%. .Iaddend..Iadd.23. The alloy of claim 21 wherein the amount of copper is about 0.5% to 3%. .Iaddend..Iadd.24. The alloy of claim 21 wherein the amount of molybdenum is between about 0.5% to 4.5%. .Iaddend..Iadd.25. The alloy of claim 21 wherein the amount of cooper is between about 0.5% to 2.5%. .Iaddend..Iadd.26. The alloy of claim 21 wherein the alloy is used in the manufacture of medical and dental applications. .Iaddend..Iadd.27. The alloy of claim 21 wherein the alloy is used in the manufacture of spring applications. .Iaddend..Iadd.28. The alloy of claim 21 wherein the alloy is used in the   
     
     
        production of wire in sizes less than φ15 mm. .Iaddend..Iadd.29.  The alloy of claim 21 wherein the alloy is used in the production of bars in sizes less than φ70 mm. .Iaddend..Iadd.30. The alloy of claim 21 wherein the alloy is used in the production of strips in sizes with thickness less than 10 mm. .Iaddend..Iadd.31. The alloy of claim 21 wherein the alloy is used in the production of tubes in sizes with outer diameter less than 450 mm and wall-thickness less than 100 mm. .Iaddend..Iadd.32. The alloy of claim 22 wherein the amount of copper is about 0.5% to 3%. .Iaddend..Iadd.33. The alloy of claim 22 wherein the amount of molybdenum is between about 0.5% to 4.5%. .Iaddend..Iadd.34. The alloy of claim 23 wherein the amount of molybdenum is between about 0.5% to 4.5%. .Iaddend..Iadd.35. The alloy of claim 32 wherein the amount of molybdenum is between about 0.5% to 4.5%. .Iaddend..Iadd.36. The alloy of claim 22 wherein the amount of copper is between 0.5% to 2.5%. .Iaddend..Iadd.37. The alloy of claim 23 wherein the amount of copper is between 0.5% to 2.5%. .Iaddend..Iadd.38. The alloy of claim 24 wherein the amount of copper is between 0.5% to 2.5%. .Iaddend..Iadd.39. The alloy of claim 32 wherein the amount of copper is between 0.5% to 2.5%. .Iaddend..Iadd.40. The alloy of claim 35, wherein the amount of cooper is 
     
     
        between 0.5% to 2.5%. .Iaddend..Iadd.41.  A precipitation hardenable, martensitic stainless steel alloy consisting essentially of, in percent by weight: about 10% to 14% chromium,   about 7% to 10% nickel,   about 0.5% to 6% molybdenum,   up to about 9% cobalt,   about 0.5% to 4% copper,   about 0.05% to 0.5% aluminum,   about 0.4% to 1.4% titanium,   not exceeding 0.03% carbon and nitrogen,   the content of tantalum, niobium, vanadium, and tungsten being at most 0.1%,   with iron as the remainder and the total content, consisting essentially of silicon not exceeding 0.4%, and manganese and any other element of the periodic table not exceeding 0.5%. .Iaddend..Iadd.42. The alloy of claim 41 wherein the amount of cobalt is up to about 6%. .Iaddend..Iadd.43. The alloy of claim 41 wherein the amount of copper is about 0.5% to 3%. .Iaddend..Iadd.44. The alloy of claim 41 wherein the amount of molybdenum is between about 0.5% to 4.5%. .Iaddend..Iadd.45. The alloy of claim 41 wherein the amount of copper is between about 0.5% to 2.5%. .Iaddend..Iadd.46. The alloy of claim 41 wherein the alloy is used in the manufacture of medical and dental applications. .Iaddend..Iadd.47. The alloy of claim 41 wherein the alloy is used in the manufacture of spring applications. .Iaddend..Iadd.48. The alloy of claim 41 wherein the alloy is used in the production of wire in sizes less than φ15 mm. .Iaddend..Iadd.49. The alloy of claim 41 wherein the alloy is used in the production of bars in sizes less than φ70 mm. .Iaddend..Iadd.50. The alloy of claim 41 wherein the alloy is used in the production of strips in sizes with thickness less than 10 mm. .Iaddend..Iadd.51. The alloy of claim 41 wherein the alloy is used in the production of tubes in sizes with outer diameter less than 450 mm and wall-thickness less than 100 mm. .Iaddend..Iadd.52. The alloy of claim 42 wherein the amount of copper is about 0.5% to 3%. .Iaddend..Iadd.53. The alloy of claim 42 wherein the amount of molybdenum is between about 0.5% to 4.5%. .Iaddend..Iadd.54. The alloy of claim 43 wherein the amount of molybdenum is between about 0.5% to 4.5%. .Iaddend..Iadd.55. The alloy of claim 52 wherein the amount of molybdenum is between about 0.5% to 4.5%. .Iaddend..Iadd.56. The alloy of claim 42 wherein the amount of copper is between 0.5% to 2.5%.   
     
     
        .Iaddend..Iadd.57.  The alloy of claim 43 wherein the amount of copper is between 0.5% to 2.5%. .Iaddend..Iadd.58. The alloy of claim 44 wherein the amount of copper is between 0.5% to 2.5%. .Iaddend..Iadd.59. The alloy of claim 52 wherein the amount of copper is between 0.5% to 2.5%. .Iaddend..Iadd.60. The alloy of claim 55, wherein the amount of cooper is between 0.5% to 2.5%. .Iaddend.

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