High-strength high-Cr ferritic heat-resistant steel
US4957701A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 15, 1988 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Aug 15, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F21/083
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high-strength high-Cr ferritic, heat-resistant steel exhibiting improved high-temperature, long-term creep strength and a process for producing the same are disclosed. The steel consists essentially of, by weight %: ______________________________________ C: not more than 0.2%, Si: not more than 1.0%, Mn: 0.1-1.5%, P: not more than 0.03%, S: not more than 0.03%, Ni: not more than 1.0%, Cr: 5.0-15%, Mo: 0.02-3.0%, W: not more than 4.0%, sol. Al: 0.05-0.04%, N: not more than 0.07%, ______________________________________ at least one of V: 0.01-0.4% and Nb: 0.01-0.3%, B: 0-0.02%, PA0 at least one of Ca, Ti, Zr, Y, La, and Ce: 0-0.2%, and PA0 the balance Fe and incidental impurities, PA0 A.sub.cl point defined by Formula (1) below being 820 or higher. ##EQU1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.