Steel Shot S70-S780 Chemical Composition C 0.85~1.20% Mn 0.35~1.20% Si â?¥0.40 S â?¤0.05% P â?¤0.05% Microhardness Normal: 40~50HRC (377~509HV) Special: 52~56HRC (543~620HV) Special: 56~60HRC (620~713HV) Microstructure Tempered Martensite or Sorbite Density 7.2g/cm3 Packaging Details 25kg/bag, 40bags/ton bag Delivery Detail About 7 days after receiving the payment