Spring steel of high strength and high corrosion resistance.

摘要

Disclosed is a spring steel for a high corrosion resistance and high strength, which exhibits an excellent drawability without softening heat treatment after hot rolling, and which has a strength of 1900 MPa or more by quenching and tempering and an excellent corrosion resistance. The spring steel contains, in mass %, 0.3-0.6% C, 1.0-3.0% Si, 0.1-0.5% Mn and 0.5-1.5% Cr, and 1.0% or less (excluding 0%) Ni and/or 0.1-0.5% Mo, the balance being essentially Fe and inevitable impurities, wherein the elements satisfy the following requirement: 2.5