Stainless steel alloy having lowered nickel-chromium toxicity and improved biocompatibility
AssigneeSciMed Life Systems, Inc.
InventorCharles Horace Craig
Life of this patent
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Abstract
The present invention is directed towards an austenitic, stainless steel series 300 alloy having improved biocompatible characteristics. The modified stainless steel alloy consists essentially of, in weight percent, about C Mn Si P S Cr Mo ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 8.5-11.5 0.0-6.25 Ni Fe “X” 6.5-7.5 46.185-74.000 5.0-10.0 whereby variable “X” could be comprised from a group consisting of Gold, Osmium, Palladium, Platinum, Rhenium Tantalum, or Tungsten. The alloy provides a unique combination of strength, ductility, corrosion resistance, and other mechanical properties which also has improved biocompatible characteristics.
Claims15
A steel alloy, consisting essentially of, in weight percent, about
- C Mn Si P S Cr Mo ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 8.5-11.5 0.0-6.25 Ni Fe “X” 6.5-7.5 46.185-74.000 5.0-10.0
- wherein variable “X” is a material selected from a group consisting of Gold, Osmium, Palladium, Platinum, Rhenium, Tantalum, and Tungsten.
A steel alloy, consisting essentially of, in weight percent, about
- C Mn Si P S Cr Mo Ni Au ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 8.5-11.5 0.0-6.25 6.5-7.5 5.0-10.0
- and the balance is essentially iron.
A steel alloy, consisting essentially of, in weight percent, about
- C Mn Si P S Cr Mo Ni Os ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 8.5-11.5 0.0-6.25 6.5-7.5 5.0-10.0
- and the balance is essentially iron.
A steel alloy, consisting essentially of, in weight percent, about
- C Mn Si P S Cr Mo Ni Pd ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 8.5-11.5 0.0-6.25 6.5-7.5 5.0-10.0
- and the balance is essentially iron.
A steel alloy, consisting essentially of, in weight percent, about
- C Mn Si P S Cr Mo Ni Pt ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 8.5-11.5 0.0-6.25 6.5-7.5 5.0-10.0
- and the balance is essentially iron.
A steel alloy, consisting essentially of, in weight percent, about
- C Mn Si P S Cr Mo Ni Re ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 8.5-11.5 0.0-6.25 6.5-7.5 5.0-10.0
- and the balance is essentially iron.
A steel alloy, consisting essentially of, in weight percent, about
- C Mn Si P S Cr Mo Ni Ta ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 8.5-11.5 0.0-6.25 6.5-7.5 5.0-10.0
- and the balance is essentially iron.
A steel alloy, consisting essentially of, in weight percent, about
- C Mn Si P S Cr Mo Ni W ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 8.5-11.5 0.0-6.25 6.5-7.5 5.0-10.0
- and the balance is essentially iron.
Dependencies are inferred from the claim text.