Weatherable steel material
US6436340B1 · kind B1 · utility
2Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2000 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Feb 24, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Steel is obtained which comprises by wt %, C: 0.001-0.025%, Si: not more than 0.60%, Mn: 0.10-3.00%, P: 0.005-0.030%, S: not more than 0.01%, Al: not more than 0.10%, Cu: 0.1-1.5%, Ni: 0.1-6.0%, B: 0.0001-0.0050%, and the balance being Fe and inevitable impurities; since the steel contains C and P in small contents, stable amorphous rusts are formed on the surface thereof at an early stage; and steel simultaneously realizes excellent weather resistance, material weldability and toughness particularly in an environment such as a seashore district and the like where salt is present in a large amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.