Method for producing low alloy hot rolled steel strip or sheet having high tensile strength, low yield ratio and excellent total elongation
US4316753A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1979 |
| Grant date | Feb 23, 1982 |
| Priority date | — |
| Expiry date | Mar 21, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing a low alloy hot rolled steel strip or sheet comprising hot rolling a steel slab at a finishing temperature not higher than the Ar.sub.3 transformation temperature plus 60.degree. C. and cooling and coiling the hot rolled strip at a temperature not higher than 500.degree. C. The steel slab contains not more than 0.20% carbon, 0.50 to 2.50% manganese and 0.05 to 1.0% chromium and optionally contains not more than 1.0% silicon, the balance being iron and unavoidable impurities. The resultant strip or sheet has a high tensile strength of not less than 40 kg/mm.sup.2, a low yeild ratio of not more than 70% and an excellent total elongation of not less than 25%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.