Patent ID: 11939650
Assignee: NIPPON STEEL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 3:
4. The hot-rolled steel sheet according to claim 2, the hot-rolled steel sheet comprising, as the chemical composition, by mass %, at least one of:
0.001 to 0.20% of Ti;
0.001 to 0.20% of Nb;
0.001 to 0.010% of B;
0.005 to 1.0% of V;
0.005 to 1.0% of Cr;
0.005 to 1.0% of Mo;
0.005 to 1.0% of Cu;
0.005 to 1.0% of Co;
0.005 to 1.0% of W;
0.005 to 1.0% of Ni;
0.0003 to 0.01% of Ca;
0.0003 to 0.01% of Mg;
0.0003 to 0.01% of REM; and
0.0003 to 0.01% of Zr.