化学成份标准.doc

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1、铸钢件化学成份标准汇编表1铸造碳钢化学成份(%)GB919---67钢号CMnSiSP(≤)ⅠⅡⅢZG150.12~0.220.35~0.650.20~0.450.040.050.06ZG250.22~0.320.50~0.800.20~0.450.040.050.06ZG350.32~0.420.50~0.800.20~0.450.040.050.06ZG450.42~0.520.50~0.800.20~0.450.040.050.06ZG550.52~0.620.50~0.800.20~0.450.040.050.06注：Ⅰ——高级铸钢；Ⅱ——优

2、质铸钢；Ⅲ——普通铸钢；钢号后边没有注明Ⅰ、Ⅱ或Ⅲ者，均视为Ⅲ级铸钢。表2重型机械铸钢件碳钢的化学成份GB/T5000.6-1998钢号元素最高含量（%）CSiMnSP残余元素NiCrCuMoVZG200~4000.200.500.800.040.040.300.350.300.200.05ZG230~4500.300.90ZG270~5000.40ZG310~5700.500.60ZG340~6400.60注：①.对上限减少0.01%的碳，允许增加0.04%的锰。对ZG200~400的锰最高至1.00%，其余四个牌号锰高至1.20%。②.残余元素总

3、量不超过1.00%，如需方无要求，残余元素可不进行分析。③.当使用酸性炉生产铸件时，S、P含量由供需双方商定。表3重型机械铸钢件低合金钢的化学成份JB/T5000.6-1998牌号CSiMnPSCrNiMoCuZG30Mn0.27~0.340.30~0.501.20~1.50≤0.035－－－－ZG40Mn0.35~0.450.30~0.451.20~1.50≤0.035－－－－ZG40Mn20.35~0.450.20~0.401.60~1.80≤0.035－－－－ZG50Mn20.45~0.550.20~0.401.50~1.80≤0.035－－－

4、－ZG20Mn(ZG20SiMn)0.12~0.220.60~0.801.00~1.30≤0.035－≤0.40－－ZG35Mn(ZG35SiMn)0.30~0.400.60~0.801.10~1.40≤0.035－－－－ZG35SiMnMo0.32~0.401.10~1.401.10~1.40≤0.035－－0.20~0.30≤0.30ZG35CrMnSi0.30~0.400.50~0.750.90~1.20≤0.0350.50~0.80－－－ZG20MnMo0.17~0.230.20~0.401.10~1.40≤0.035－0.20~0.35≤0

5、.30ZG55CrMnMo(ZG5CrMnMo)0.50~0.600.25~0.601.20~1.60≤0.0350.60~0.90－0.20~0.30≤0.30ZG40Crl(ZG40Cr)0.35~0.450.20~0.400.50~0.80≤0.0350.80~1.10－－－ZG34Cr2Ni2Mo(ZG34CrNiMo)0.30~0.370.30~0.600.60~1.00≤0.0351.40~1.701.40~1.700.15~0.35－ZG20CrMo0.17~0.250.20~0.450.50~0.80≤0.0350.50~0.80－0

6、.40~0.60－ZG35CrlMo(ZG35CrMo)0.30~0.370.30~0.500.50~0.80≤0.0350.80~1.20－0.20~0.30－ZG42CrlMo(ZG42CrMo)0.38~0.450.30~0.600.60~1.00≤0.0350.80~1.20－0.20~0.30－ZG50CrlMo(ZG50CrMo)0.46~0.540.25~0.500.50~0.80≤0.0350.90~1.20－0.15~0.25－ZG65Mn0.60~0.700.17~0.370.90~1.20≤0.035－－－－ZG28NiCrMo

7、0.25~0.300.30~0.800.60~0.80≤0.0350.35~0.850.40~0.800.35~0.55－ZG30NiCrMo0.25~0.350.30~0.600.70~1.00≤0.0350.60~0.900.60~1.000.35~0.50－ZG35NiCrMo0.30~0.370.60~0.900.70~1.00≤0.0350.40~0.900.60~0.900.40~0.50－注：1.括号内牌号为传统牌号。2.残余元素含量：Ni≤0.30%，Cr≤0.30%，Cu≤0.25%，Mo≤0.15%，V≤0.05%，残余元素总量≤

8、1%。如需方无要求，残余元素不作为验收依据。表4汽轮机常用铸钢化学成份JB/T7024---2002牌号CM