Low-chromium ferritic heat-resistant steel with improved toughness and creep strength
US5407635A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 12, 1993 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Mar 12, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/54
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A low-Cr ferritic steel with improved toughness as well as creep strength is disclosed, which consists essentially of, by weight %: PA1 C: 0.03-0.12%, Si: 0.70% or less, Mn: 0.10-1.50%, PA1 Ni: 2.0% or less, Cr: 1.50-3.50%, W: 1.0-3.0%, PA1 V: 0.10-0.35%, Nb: 0.01-0.10%, PA1 B: 0.00010-0.020%, N: 0.005% or less, PA1 Al: 0.005% or less, PA1 Ti: not less than 0.001% but less than 0.05%, PA1 Cu: 0.10-2.50%, PA1 at least one of La, Ce, Y, Ca, Zr, Ta each in an amount of 0-0.20%, and Mg in an amount of 0-0.05%, PA1 Mo in an amount of 0-0.40%, and PA1 a balance of Fe and incidental impurities including P: not more than 0.030% and S: not more than 0.015%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.