... , G40, G50, G80 NameCast steel gritchemicalsC0.95~1.05 %Mn0.35~1.20%Si0.40~1.20%S ... ≤0.05%P≤0.05%Cr0.5%~1.65Average hardness >40-50HRC ... during shot basting process, it is particularly used for surface preparation applications(2)≥53-60HRC:With this ... High hardness, sharp edges remain during operation, mainly used for marble cutting,characters: stable and reliable performance,even size , ...