steel shot high quality ISO9001 SAE steel shot Contact: Emily Qin Skype:qt.1131QQ:1742625742Tel:0086-15966055683 The Techinical Data Of Steel Shot1. Production specification: S780, S660, S550, S460, S390, S330, S280, S230, S170, S110,S702. Chemical Composition of the products: C 0.70-1.20% Mn 0.60-1.20%, Si 0.40-1.20%, S≤0.05%, P ≤0.05%3. Hardness: Normal: 40-50HRC Special: 52-56HRC, 56-60HRC4. ...