标准号:IS 9175 Pt.20-1986
发布日期:1986/8/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This standaad ( Part 20 ) covers the mechanical properties, harden-ability and isothermal transformation characteristics of 20MnCr5 grade of steel for use by automobile and ancillary industry.1.2 This is a carburizing ( case hardening ) steel used for components requiring high wear resistant surface, coupled with tough cores to resist shock loads and strength to give larger service life.