Stainless steel alloy having lowered nickel-chromium toxicity and improved biocompatibility
AssigneeSciMed Life Systems, Inc., a Minnesota corporation
InventorCharles Horace Craig
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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 1 C Mn Si P S ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 Cr Mo Ni Fe “X” 8.5-11.5 0.0-6.25 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.
Claims39
A modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel.
A modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 14 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 15 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 16 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 17 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 18 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 19 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 20 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.
A modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 21 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 22 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 23 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 24 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 25 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 26 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 modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 27 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.
A modified series 300 stainless steel alloy which provides improved biocompatible characteristics over standard 300 stainless steel, said alloy consisting essentially of, in weight percent, about
- 28 C Mn Si P S Cr Mo Ni Fe “X” ≦0.030 ≦2.00 ≦0.750 ≦0.023 ≦0.010 8.5-11.5 0.0-6.25 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.
Dependencies are inferred from the claim text.