化学成分
碳 C :0.38~0.45%
硅 Si:0.17~0.37%
锰 Mn:0.50~0.80%
硫 S :允许残余含量≤0.035%
磷 P :允许残余含量≤0.035%
铬 Cr:0.90~1.20%
镍 Ni:允许残余含量≤0.030%
铜 Cu:允许残余含量≤0.030%
钼 Mo:0.15~0.25%
力学性能
抗拉强度σb (MPa):≥1080(110)
屈服强度 σs (MPa):≥930(95)
伸长率 δ5 (%):≥12
断面收缩率ψ (%):≥45
冲击功 Akv (J):≥63
冲击韧性值 αkv (J/cm2):≥78(8)
硬度 :≤217HB
试样尺寸:试样毛坯尺寸为25mm
对应各国牌号
对应国际标准组织牌号:42CrMo4
对应日本牌号:SCM440
对应德国牌号:42CrMo4 或1.7225
近似对应美国牌号:4140或G41400
特性及适用范围:
强度、淬透性高,韧性好,淬火时变形小,高温时有高的蠕变强度和持久强度。用于制造要求较35CrMo钢强度更高和调质截面更大的锻件,如机车牵引用的大齿轮、增压器传动齿轮、压力容器齿轮、后轴、受载荷极大的连杆及弹簧夹,也可用于 2000m以下石油深井钻杆接头与打捞工具,并且可以用于折弯机的模具等。
嘉旺合金结构钢:09MnNb 09Mn2 18Nb 09MnCuPTi 12MnSiCu 14MnNb16Mn 16MnRE 10MnPNbRE 14MnViRE 15MnVN 20Mn2 30Mn2 35Mn2 40Mn2 45Mn2 50Mn2 20MnV30Mn2MoW 27SiMn 35SiMn 42SiMn 20SiMn2MoV 25SiMn2MoV 37SiMn2MoV 40B 45B 40MnB 45MnB20Mn2B 20MnMoB 20MnVB 40MnVB 20MnTiB 25MnTiBRF 20SiMnVB 15Cr 30Cr 35Cr 40Cr 45Cr50Cr 38CrSi 12CrMo 20CrMo 30CrMo 35CrMo 42CrMo 12CrMoV 12Cr1MoV 35CrMoV 24CrMoV25Cr2MoVA 25Cr2Mo1VA 20Cr3MoWVA 38CrMoA1 20CrV 40CrV 50CrVA 15CrMn 20CrMn 40CrMn20CrMnSi 25CrMnSi 30CrMnSi 30CrMnSiA 35CrMnSiA 15CrMnMo 20CrMnMo 40CrMnMo 20CnMnTi30CrMnTi 20CrNi 40CrNi 45CrNi 50CrNi 12CrNi2 30CrNi3 37CrNi3 12Cr2Ni420Cr2Ni4 20CrNiMoA 40CrMiMoA 45CrNiMoVA 18Cr2Ni4WA 25Cr2Ni4WA
俄罗斯合金结构钢:20Г2,30Г2,35Г2,40Г2,45Г2,50Г2,35CГ,35CГ,15X,20X,30X,35X,40X,45X,38XC,12XM,15XM,20XM,30XM,35XM,12XMΦ,12X1MΦ,25X2M1ΦA,20XΦ,40XΦA,50XΦA,15XГ,18XГ,20XГCA,30XГCA,40XH,20XH3A,30XH3A,38XMIOA,40XHMA
美国合金结构钢:1330,1335,1340,1345,TS14B35,50B46H,50B40,50B44,5115,5120,5130,5132,5140,51,455,147,A-387Cr. B,4125,4130,4140,4135,6120,6140,6150,5152,3140H,3316,3325,3330,80B20,4340
英国合金结构钢:150M19,150M28,150M36,En46,En46,523M15,527A19,530A30,530A36,520M40,534A99,620Cr.B,1653,CDS12,CDS110,En20A,1717COS110,708A42,708M40,708A37,735A30,527A60,640M40,653M31,905M39,871M40
日本合金结构钢:**n420,**n433H,**n438(H),**n443,SCr415(H),SCr420H,SCr430,SCr430(H),SCr440,SCr445,STC42,STT42,STB42,SCT42,STT42,STB42,SCM420,SCM3,SNC236,SNC631H,SNC631,SACM645,SNCM439
法国合金结构钢:32M5,35M5,40M5,~55M5,12C3,18C3,32C4,42C4,45C4,12CD4,18CD4,25CD4,30CD4,42CD4,35CD4,20NC11,40CAD6.12
德国合金结构钢:20Mn5,30Mn5,36Mn5,46Mn7,20MnV6,37MnSi5,46MnSi4,15Cr3,20Cr4,28Cr4,34Cr4,41Cr4,13CrMo44,16CrMo44,20CrMo44,25CrMo4,42CrMo4,34CrMo4,13CrMoV42,22CrV4,42CrV6,40NiCr6,20NiCr14,28NiCr10,41CrAlMo07,40NiCrMo22