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Chromium Molybdenum Alloy Steel Hammers Product Details Composition(%) C Si Mn Cr Mo Ni P&S Hardness ASTM A297 Grade H1 0.2~0.35 1.2~1.7 0.6~1.0 1.2~2.0 0.15~0.25 0.3~0.45 ≤0.04 ≥HB481 (eqv.HRc50) ...