1. ISO9000 2. ASTM A792, JIS G3302, Chinese standard 3. Hard, full hard, steel ... . (0.2-1.2)*(800-1500) steel1. Certificate: ISO9000 Standard: ASTM A792, JIS G3302, BS, GB, TIN, Chinese standard, factory standard ... , S45C, S50C, A572ST37, ST37-2, ST52 and etc.StandardASTM A570, ASTM A36, JIS G3101, SAE 1045, DIN EN 10025GB/T09-2006Surface treatmentpolishedTickness2 ...