Austenitic steel having improved high-temperature strength and corrosion resistance
US4842823A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Aug 14, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C30/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An austenitic steel having improved high-temperature strength as well as corrosion resistance is disclosed. The steel consists essentially of, by weight %: PA0 C: not more than 0.15%, Si: not more than 1.0%, PA0 Mn: not more than 10%, Cr: 20-30%, PA0 Ni: 30-55%, at least one of Mg and Ca in a total amount of 0.0010-0.0500%, PA0 Mo: 0.5-6.0% and/or W: 1.0-12.0%, wherein PA0 Mo(%)+1/2W(%)=0.5-6.0(%), PA0 B: 0-0.0100%, Zr: 0-0.200%, PA0 Ti: 0-0.30%, Nb: 0-1.00%, PA0 V: 0-1.00%, and PA0 balance: Fe and incidental impurities, of which impurities P, S, and Al are restricted to: PA0 P: not more than 0.020%, PA0 S: not more than 0.010%, and PA0 Al: not more than 0.030%, PA0 P (%)+S (%)+Al (%) being less than 0.050%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.