Patent ID: 9353424
Filing Date: 2016-05-31
CPC Classification: B22D,B32B,C21D,C22C,C23C,Y10T

Claim Text:
1. A high strength steel sheet comprising chemical components of, in mass %, C: 0.20 to 0.42%, Si: 0.06 to 0.5%, Mn: 0.2 to 2.2%, Cr: 0.1 to 2.5%, B: 0.0005 to 0.01%, O: 0.0020 to 0.020%, Al: 0.001 to 0.03%, Ti: 0.001 to 0.05%, Nb: 0 to 0.1%, Mo: 0 to 1.0%, W: 0 to 0.5%, V: 0 to 0.5%, Ni: 0 to 5.0%, Cu: 0 to 1.0%, N: 0.1% or less, P: 0.03% or less, S: 0.02% or less, and the balance: Fe and inevitable impurities,