High strength stainless steel
US4849166A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1988 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Sep 12, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/001
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
There is disclosed a high strength stainless steel consisting essentially of not more than 0.10% C., more than 1.5% and not more than 2.95% Si, less than 0.5% Mn, not less than 4.0% and not more than 8.0% Ni, not less than 12.0% and not more than 18.0% Cr, not less than 0.5% and not more than 3.5% Cu, not more than 0.15% N and not more than 0.004% S, wherein the total content of C and N is not less than 0.10%, the balance is Fe and incidental impurities, said steel satisfies the relations A'>42, and 35<Md(N)<95, wherein A'=17.times.(C % / Ti %)+0.70.times.(Mn %)+1 x-(Ni %)+0.60.times.(Cr %)+0.76 (Cu %)-0.063.times.(Al %) and Md(N)=580-520 (C %)-2 (Si %)-16 (Mn %)-16 (Cr %)-23 (Ni %)-300 (N %)-26 (Cu %). This steel is inexpensive and can be provided with high strength and high ductility by cold working and aging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.