Patent ID: 11884990
Assignee: TATA STEEL NEDERLAND TECHNOLOGY B.V.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 17:
18. The method according to claim 15, wherein the hot-rolled steel strip is pickled, cold-rolled, annealed at an annealing temperature of between Ac1-temperature and Ac3-temperature, or above Ac3-temperature, cooled and optionally temper rolled, and wherein the yield strength of the rolled strip or the temper rolled strip is at least 600 MPa and the tensile strength is at least 1000 MPa,
wherein Ac1-temperature is a temperature at which austenite begins to form during heating, and
wherein Ac3-temperature is a temperature at which transformation of ferrite to austenite is completed during heating.