Steel sheet for tin plated steel sheet and tin-free steel sheet each having excellent formability and manufacturing method thereof
US7501031B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2005 |
| Grant date | Mar 10, 2009 |
| Priority date | — |
| Expiry date | Dec 28, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides a steel sheet for hard tinplate and a TFS steel sheet each having an excellent formability and a temper grade of T4 to DR9, and an efficient manufacturing method capable of selectively manufacturing these steel sheets by using raw materials having the same composition, wherein, the steel sheet for hard tinplate and a TFS steel sheet having a temper grade of T4 to DR9 is manufactured from raw materials having the same composition by changing a reduction ratio of temper rolling or double reduce rolling for ultra-low carbon aluminum killed steel C and P contents of which are so regulated as to satisfy a specific formula <1>:1.6×C×104+0.93×P×103≧70 . . . <1>.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.