Patent ID: 11952650
Assignee: NIPPON STEEL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  F | IPC B  C  F

Claim 0:
1. A steel wire having a chemical composition consisting of, in mass %,
C: 0.53 to 0.59%,
Si: 2.51 to 2.90%,
Mn: 0.70 to 0.85%,
P: 0.020% or less,
S: 0.020% or less,
Cr: 1.40 to 1.70%,
Mo: 0.17 to 0.53%,
V: 0.23 to 0.33%,
Cu: 0.050% or less,
Ni: 0.050% or less,
Al: 0.0050% or less,
Ti: 0.050% or less,
N: 0.0070% or less,
Ca: 0 to 0.0050%, and
Nb: 0 to 0.020%,
with the balance being Fe and impurities,
wherein a number density of V-based precipitates having a maximum diameter ranging from 2 to 10 nm is 500 to 8000 per μm2.