化學(xué)成份
碳 C :0.38~0.45% 硅 Si:0.17~0.37%
錳 Mn:0.50~0.80% 硫 S :允許殘余含量≤0.035% 磷 P :允許殘余含量≤0.035% 鉻 Cr:0.90~1.20% 鎳 Ni:允許殘余含量≤0.030% 銅 Cu:允許殘余含量≤0.030% 鉬 Mo:0.15~0.25% 42CrMo許用應(yīng)力 42CrMo許用應(yīng)力186~310/MPa,屈服點(diǎn)930σs/MPa,42CrMo強(qiáng)度、淬透性高,韌性好,淬火時(shí)變形小,高溫時(shí)有高的蠕變強(qiáng)度和持久強(qiáng)度。42CrMo用于制造要求較35CrMo鋼強(qiáng)度更高和調(diào)質(zhì)截面更大的鍛件