High Cr content, P added ferritic stainless steel having improved atmospheric corrosion resistance and rust prevention
US5405575A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1993 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Oct 22, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/18
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
High Cr content, P added ferritic stainless steel containing, in % by weight, C: up to 0.02%, Si: up to 1.0%, Mn: up to 1.0%, S: up to 0.03%, Cr: from more than 20% to 40%, N: up to 0.015%, Al: up to 0.5%, and P: from more than 0.06% to 0.20%, the balance being Fe and incidental impurities, is improved in atmospheric corrosion resistance and rust prevention. The stainless steel may further contain at least one element selected from the following groups: (1) Mo: up to 4.0%; (2) one or more elements of Ti: up to 1.0%, Nb: up to 1.0%, Ta: up to 1.0%, V: up to 1.0%, W: up to 1.0%, Zr: up to 1.0%, and B: up to 0.01%; and (3) one or more elements of Cu: up to 1.0%, Ni: up to 5.0%, and Co: up to 1.0%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.