Forging Pieces 42CrMo Steel Shaft Forging Processing Manufacturing

Standard No.Alloy No.Chemical compositions(%)CSiMnS PCrNiCuMoGB/T3077-199942CrMo0.38~0.450.17~0.370.50~0.80≤0.035≤0.0350.90~1.20≤0.3≤0.30.15~0.25MechanicalTensile Strength Mpa (min)Yeild Strength Mpa (min)Elongation % (min)Contraction% of area ZV(min)Impact toughnessAKV J (min)Property≥1080≥930≥12≥45≥6342CrMO related performance and parameters:42CrMO steel belongs to alloy structural steel in terms of ma-terial classification, has good mechanical properties and ma-chinability, and is widely used, mainly has plate and roundbar two types of materials, its comprehensive performance isbetter than 40CR, has been recognized by the industry.42CrMo steel is a super high strength steel with high strengthand toughness, good hardenability, no obvious temper brit-tleness, high fatique limit and multi-impact resistance afterquenching and tempering treatment, good impact toughnessat low temperature. 42CrMo steel is suitable for the manufac-ture of large and medium-sized plastic molds requiring cer-tain strength and toughness.42CrMO mechanical properties:Hardness: annealed, 147 ~ 241HB, 42crmo 42crmo mechani-cal properties: tensile strength ob (MPa) : >1080(110) yieldstrength os (MPa) :2930(95) elongation 65(%): z12 sectionshrinkage w(%) : 245 impact work AKV (J-RRB- : 263 impacttoughness value aJvCM2/cm2) :>78(8) hardness: GT; 850° C, 4 & GT; 50 mm, the cooling is slow. Normalizingspecification normalizing temperature 850 ~ 900°Cout of the furnace air cooling. High temperature tem-pering specification tempering temperature 680 ~700°C, out of the furnace air-cooling. The specifica-tions for quenching and tempering include preheat-ing temperature 680 ~ 700· C, quenching tempera-ture 840 ~ 880°C, oil cooling, tempering tempera-ture 580° C, water cooling or oil cooling, hardness