(高清版)GB∕T 20878-2024 不锈钢 牌号及化学成分

不锈钢牌号及化学成分国家市场监督管理总局国家标准化管理委员会IGB/T20878—2024本文件按照GB/T1.1—2020《标准化工作导则第1部分：标准化文件的结构和起草规则》的规定起草。本文件代替GB/T20878—2007《不锈钢和耐热钢牌号及化学成分》。与GB/T20878—2007相a)范围删除了“耐热钢”(见第1章，2007年版的第1章);b)删除了“耐热钢”的术语和定义(见2007年版的第2章);c)更改了“奥氏体-铁素体(双相)不锈钢”和的定义(见第3章，2007年版的第2章);d)更改了锰、磷、氮、铜含量极限值的确定准则(见4.3,2007年版的3.3);e)增加了不锈钢牌号和统一数字代号的表示方法的规定(见第5章和附录A);f)更改了部分统一数字代号表示方法(见表1～表5、表B.1、表C.1,2007年版的表1～表5、g)更改了8个牌号的化学成分(见表1、表2、表3和表5,2007年版的表1、表2、表3和表5);h)增加了97个牌号及化学成分，其中奥氏体不锈钢51个，奥氏体-铁素体(双相)不锈钢14个，铁素体不锈钢23个，马氏体不锈钢8个，沉淀硬化不锈钢1个(见表1～表5,2007年版的表1～表5);i)删除了23个牌号及其化学成分(见表1～表5,2007年版的表1～表5)。请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别专利的责任。本文件由中国钢铁工业协会提出。本文件起草单位：冶金工业信息标准研究院、山西太钢不锈钢股份有限公司、福建青拓特钢技术研环精密钢管有限公司、甘肃酒钢集团宏兴钢铁股份有限公司、江苏武进不锈股份有限公司、国家碳素结构钢产品质量检验检测中心(山东)、中国石化工程建设有限公司、山东省特种设备检验研究院集团有限市天盛不锈钢制品有限公司、泰州市吉强不锈钢制品有限公司、浙江正同管业有限公司、浙江康帕斯流体技术股份有限公司。本文件及其所代替文件的历次版本发布情况为：——2007年第一次修订为GB/T20878—2007;2除非作为合金元素，管材及其相关产品硅含量宜不大于0.75%,长条材和锻件硅含量宜不大于注：某些Cr-Mn-Ni或Cr-Mn-Ni-N不锈钢的磷含量可不大于0.060%。除非特殊技术要求较宽的成分范围(一般含量较高),镍含量上下限范围宜不大于3%。铬含量上下限范围宜为2%,但最大不大于3%。36.3本文件不能单独用于订货。本文件中不锈钢牌号的化学成分在被产品标准或技术协议采用之表1奥氏体不锈钢牌号和统一数字代号及其化学成分序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素1022Cr17Ni75.00~16.00~26.00~16.00~3022Cr17Ni7N5.00~16.00~0.07~48.00~17.00~52.00~8.00~17.00~6Y12Cr18Ni98.00~17.00~7Y12Cr18Ni9Se8.00~17.00~Se≥0.158Y12Cr18Ni9Cu38.00~17.00~1.50~9022Cr19Ni108.00~18.00~06Cr19Ni10a8.00~18.00~07Cr19Ni10a0.04~8.00~18.00~表1奥氏体不锈钢牌号和统一数字代号及其化学成分(续)U7序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素S30450a05Cr19Ni10Si2CeNa0.04~0.061.00~0.800.0450.0309.00~18.00~0.12~0.18Ce0.03～0.08S30453022Cr19Ni10N0.0300.0450.0308.00~18.00~20.000.10~0.16S3045806Cr19Ni10N0.080.0450.0308.00~18.00~20.000.10~0.16S3047806Cr19Ni9NbN0.080.0450.0307.50~18.00~20.000.15~0.30Nb0.15S3048006Cr18Ni9Cu20.080.0450.0308.00~17.00~1.00~S30483022Cr18Ni9Cu30.0300.0450.0308.00~17.00~3.00~4.00S3048806Cr18Ni9Cu30.080.0450.0308.50~17.00~3.00~4.00S30489a10Cr18Ni9NbCu3BNa0.07~0.130.300.500.0450.0307.50~17.00~2.50~0.05~0.12Nb0.30～0.60B0.0010～0.0100Al0.003～0.030S3050806Cr18Ni120.080.0450.03011.00~16.50~S3051010Cr18Ni120.120.0450.03010.50~17.00~S30548a06Cr18Ni13Si4a0.083.00~0.0450.03011.50~15.00~20.00—O表1奥氏体不锈钢牌号和统一数字代号及其化学成分(续)O序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素S30549a16Cr20Ni14Si2a0.201.50~0.0400.03012.00~19.00~22.00S3064020Cr18Ni15Si4Al0.16~0.243.20~4.000.0300.03013.50~17.00~—Al0.18～1.50S30808a06Cr20Ni11a0.080.0450.03010.00~19.00~21.00S30850a20Cr21Ni12SiNa0.15~0.250.75~1.00~0.0350.03010.50~20.50~22.500.300.15~0.30S3082908Cr21Ni11Si2NCe0.05~0.101.40~0.800.0350.02020.00~22.0010.00~0.14~0.20Ce0.03～0.08S30908a06Cr23Ni130.080.0450.03012.00~22.00~24.00S30920a16Cr23Ni13a0.200.0400.03012.00~22.00~24.00S30989a07Cr23Ni15Cu4NbNBa0.04~0.100.750.0300.01013.00~22.00~24.003.00~4.000.15~0.35Nb0.30～0.70B0.0020～0.0060S31002012Cr25Ni200.0150.150.0200.01519.00~22.0024.00~26.000.100.10S31008a06Cr25Ni20a0.080.0450.03019.00~22.0024.00~26.00S31009a07Cr25Ni200.04~0.100.750.0300.01519.00~22.0024.00~26.00表1奥氏体不锈钢牌号和统一数字代号及其化学成分(序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素S3102020Cr25Ni20a0.250.0400.03019.00~22.0024.00~26.00S31053022Cr25Ni22Mo2N0.0300.400.0300.01521.00~23.0024.00~26.002.00~一0.10~0.16S31059a07Cr25Ni21NbNa0.04~0.100.750.0300.01519.00~22.0024.00~26.000.15~0.35Nb0.20～0.60S31089a07Ni25Cr22W4Cu3CoNbNBa0.04~0.100.400.600.0250.01523.50~26.5021.50~23.502.50~0.20~0.30Nb0.40～0.60W3.00～4.00Co1.00～2.00B0.002～0.008S31092015Ni26Cr25Mo5Cu2N0.0200.700.0300.01024.00~27.0024.00~26.004.70~1.00~0.17~0.25S31252015Cr20Ni18Mo6CuN0.0200.800.0300.01017.50~19.50~20.506.00~6.500.50~0.18~0.22S31292015Ni27Cr22Mo7CuN0.0200.500.0300.01026.00~28.0020.50~23.006.50~8.000.50~0.30~0.40S31293022Cr24Ni22Mo6Mn3W2Cu2N0.0302.00~4.000.0350.02021.00~24.0023.00~25.005.20~6.201.00~0.35~0.60W1.50～2.50S31400a16Cr25Ni20Si2a0.201.50~0.0400.03019.00~22.0024.00~26.000.10—S31603022Cr17Ni12Mo20.0300.0450.03010.00~16.00~2.00~1奥氏体不锈钢牌号和统一数字代号及其化学成分(续)序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素06Cr17Ni12Mo2a10.00~16.00~2.00~07Cr17Ni12Mo2a0.04~10.00~16.00~2.00~022Cr17Ni12Mo2N10.00~16.00~2.00~0.10~022Cr20Ni9MoNc8.00~19.50~0.50~0.14~06Cr17Ni12Mo2N10.00~16.00~2.00~0.10~06Cr17Ni12Mo2Ti10.00~16.00~2.00~Ti≥5C06Cr17Ni12Mo2Nb10.00~16.00~2.00~022Cr18Ni14Mo2Cu212.00~17.00~1.20~1.00~一06Cr18Ni12Mo2Cu210.00~17.00~1.20~1.00~022Cr19Ni13Mo311.00~18.00~3.00~06Cr19Nil3Mo3a11.00~18.00~3.00~O表1奥氏体不锈钢牌号和统一数字代号及其化学成分(序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素S31723022Cr19Ni16Mo5N0.0300.0450.03013.50~17.00~20.004.00~0.10~0.20S31753022Cr19Ni13Mo4N0.0300.0450.03011.00~18.00~20.003.00~4.000.10~0.22S3179403Cr18Ni16Mo50.040.0450.03015.00~16.00~4.00~6.00S32050022Cr23Ni21Mo6N0.0300.0350.02020.00~23.0022.00~24.006.00~6.800.400.21~0.32一S32053022Ni25Cr23Mo6N0.0300.0300.01024.00~26.0022.00~24.005.00~6.000.17~0.22S32168a06Cr18Ni11Tia0.080.0450.0309.00~17.00~Ti5C～0.70S32169a07Cr19Ni11Tia0.04~0.100.0450.0309.00~17.00~20.000.10Ti4(C+N)～0.70S32652015Cr24Ni22Mo8Mn3CuN0.0200.502.00~4.000.0300.00521.00~23.0024.00~25.007.00~8.000.30~0.600.45~0.55S34553022Cr24Ni17Mo5Mn6NbN0.0305.00~0.0300.01016.00~23.00~25.004.00~0.40~0.60Nb0.10S34778a06Cr18Ni11Nba0.080.0450.0309.00~17.00~Nb10C～1.10S34779a07Cr18Ni11Nba0.04~0.100.0450.0309.00~17.00~Nb8C～1.10序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素7.50~1.00~14.50~1.00~0.10~8.00~1.00~13.50~0.50~0.10~8.00~1.00~13.50~0.10~20Cr15Mn15Ni2N0.15~14.00~1.50~14.00~0.15~6.00~3.50~14.00~1.00~0.05~04Cr16Mn8Cu3Ni2N7.50~1.80~15.50~2.30~0.10~022Cr16Mn8Ni2N7.00~1.50~15.00~0.15~7.00~1.00~16.00~0.15~5.00~1.00~16.00~0.50~0.20~一8.50~1.00~15.50~0.20~08Cr17Mn7Ni2Cu2N6.00~1.50~16.00~0.80~0.10~出序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素S3528508Cr17Mn6Ni3Cu3N0.100.755.00~0.0450.0302.00~4.0016.00~1.50~0.05~0.25S3528612Cr16Mn8Ni3Cu3N0.157.00~9.000.0500.0301.50~15.50~2.00~4.000.05~0.25S3535012Cr17Mn6Ni5N0.155.50~0.0500.0303.50~16.00~0.05~0.25S35353022Cr17Mn6Ni5N0.0300.755.50~0.0450.0303.50~16.00~0.05~0.25S35355022Cr17Mn7Ni5N0.0300.806.40~0.0450.0304.00~16.00~0.10~0.25S3538008Cr17Mn7Ni5Cu3N0.100.755.50~0.0450.0303.50~16.00~0.601.50~0.05~0.25一S35387Y06Cr17Mn6Ni6Cu2S0.085.00~6.500.0450.18~0.355.00~6.5016.00~1.75~S3538806Cr18Mn7Ni4CuN0.085.00~8.000.0500.0303.00~17.00~0.600.50~0.15~0.30S3545012Cr18Mn8Ni5N0.157.50~0.0500.0304.00~6.0017.00~0.05~0.25S3550012Cr18Mn12Ni2N0.1511.00~0.0450.0300.50~16.50~0.20~0.45—S3551012Cr19Mnl1Ni2CuN0.159.50~0.0500.0301.00~18.00~20.000.50~0.20~0.30序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素03Cr19Mn12Ni3N10.00~2.00~17.50~0.30~10.00~1.00~17.50~0.30~53Cr21Mn9Ni4Na0.48~8.00~3.25~20.00~0.35~05Cr19Mn6Ni5Cu2N4.00~3.50~17.50~0.50~0.20~08Cr19Mn6Ni3Cu2N4.00~2.50~17.50~0.50~0.20~55Cr21Mn8Ni2Na0.50~7.00~1.50~19.50~0.20~50Cr21Mn9Ni4Nb2WNa0.45~8.00~3.50~20.00~0.40~W0.80～1.5005Cr20Ni7Mn4N2.00~6.00~19.00~0.15~33Cr23Ni8Mn3Na0.28~0.50~1.50~7.00~22.00~0.25~05Cr22Ni13Mn5Mo2NbVN4.00~11.50~20.50~1.50~0.20~Nb0.10～0.30V0.10～0.30序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素S3588605Cr19Ni6Mn4Cu2MoN0.062.00~0.0450.0305.00~18.00~20.000.50~0.50~0.20~0.30S3588705Cr21Ni10Mn3Cu2Mo2N0.061.00~4.000.0450.0308.50~20.00~22.001.00~0.50~0.20~0.30S38367022Ni24Cr21Mo6N0.0300.0400.03023.50~25.5020.00~22.006.00~0.750.18~0.25S38377a12Ni35Cr160.150.0400.03033.00~37.0014.00~—S3840003Ni18Cr160.040.0450.03017.00~15.00~S3840806Ni18Cr160.080.0450.03017.00~15.00~S38843022Ni16Cr14Si6MoCu0.0305.50~6.500.0450.02015.00~13.00~0.75~0.75~Al0.30S38926015Ni25Cr20Mo6CuN0.0200.500.0300.01024.00~26.0019.00~21.006.00~0.50~0.15~0.25S39042015Cr21Ni26Mo5Cu20.0200.0400.03023.00~28.0019.00~23.004.00~1.00~0.10注：表中所列成分除标明范围或最小值外，其余均为最大值。序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素022Cr20Mn5Ni2N4.00~1.00~19.50~0.05~022Cr21Ni4Mo2N3.00~19.50~1.50~0.14~022Cr21Mn2Ni2MoN2.00~1.00~20.50~0.10~0.15~03Cr22Mn5Ni2CuMoN4.00~1.35~21.00~0.10~0.10~0.20~022Cr19Ni5Mo3Si2N1.30~1.00~4.50~18.00~2.50~0.05~022Cr23Ni2N1.00~21.50~0.18~022Cr23Ni5Mo3N4.50~22.00~3.00~0.14~022Cr21Mn3Ni3Mo2N2.00~2.00~19.00~1.00~0.14~0.09~4.80~20.00~Ti5(C—0.02)～0.80022Cr22Ni5Mo3N4.50~21.00~2.50~0.08~022Cr24Ni4Mn3Mo2CuN2.50~3.00~23.00~1.00~0.10~0.20~表2奥氏体-铁素体(双相)不锈钢牌号和统一数字代号及其化学成分(续)序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素S22553022Cr25Ni6Mo2N0.0300.0300.0305.50~6.5024.00~26.001.20~0.10~0.20S22583022Cr25Ni7Mo3WCuN0.0300.750.0300.0305.50~24.00~26.002.50~0.20~0.800.10~0.30W0.10～0.50S22582019Cr25Ni7Mo4Cu2WN0.0250.800.0250.0026.50~8.0024.00~26.003.00~4.001.20~0.23~0.33W0.80～1.20S22584022Cr25Ni7Mo3W2CuN0.0300.800.0300.0206.00~8.0024.00~26.002.50~0.20~0.800.24~0.32W1.50～2.50S23043022Cr23Ni4MoCuN0.0300.0350.0303.00~21.50~24.500.05~0.600.05~0.600.05~0.20S25073022Cr25Ni7Mo4N0.0300.800.0350.0206.00~8.0024.00~26.003.00~0.500.24~0.32Cr+3.3Mo+16N≥41S25203022Cr25Ni7Mo4Cu2N0.0300.800.0350.0205.50~8.0024.00~26.003.00~0.50~0.20~0.35S2555403Cr25Ni6Mo3Cu2N0.0400.0350.0304.50~6.5024.00~27.002.90~1.50~0.10~0.25S27073022Cr28Ni8Mo4CoN0.0300.500.0300.0105.50~9.5026.00~29.004.00~0.30~0.50S27603022Cr25Ni7Mo4WCuN0.0300.0300.0106.00~8.0024.00~26.003.00~4.000.50~0.20~0.30Cr+3.3(Mo+¹w)+序号统一数字代号化学成分(质量分数)/%MnPSNiMoN其他元素S2900806Cr26Ni4Mo20.080.750.0400.0302.50~23.00~28.001.00~S29063022Cr29Ni7Mo2MnN0.0300.800.80~0.0300.0305.80~28.00~30.001.50~0.800.30~0.40S29503022Cr28Ni4Mo2N0.0300.600.0350.0103.50~26.00~29.001.00~一0.15~0.35注：表中所列成分除标明范围或最小值外，其余均为最大值。序号统一数字代号化学成分(质量分数)/%CPSNiN其他元素S11163022Crl1Tia0.0300.0400.0200.6010.50~0.030Ti≥8(C十N)Ti0.15～0.50Nb0.10S11164022Crl1NiNbTi0.0300.0400.0300.75~10.50~0.040Ti≥0.50Nb10(C+N)～0.80S1116806Crl1Tia0.080.0450.0300.6010.50~Ti6C～0.75S11173022Crl1NbTia0.0300.0400.0200.6010.50~0.030(Ti十Nb)[8(C+N)十0.08]~0.75Ti≥0.05序号统一数字代号化学成分(质量分数)/%CMnSNiMoN其他元素S1117604Cr11Nb0.060.0400.0300.5010.50~Nb10C～0.75S11203022Cr12a0.0300.0400.0300.6011.00~S11213022Cr12Nia0.0300.0400.0150.30~10.50~0.030S1130606Cr130.080.0400.0300.6011.50~S1134806Cr13A]a0.080.0400.0300.6011.50~Al0.10～0.30S1146806Cr14Ni2MoTi0.080.0450.0301.00~13.50~0.20~Ti0.30～0.50S115100.120.0400.0300.6014.00~S11573022Cr15NbTi0.0300.0400.0300.6014.00~0.500.030(Ti+Nb)0.30～0.80S117100.120.0400.0300.6016.00~S11717Y10Cr170.120.0600.6016.00~0.60S11763022Cr17NbTi0.0300.750.0400.0300.6016.00~Ti或Nb0.10～1.00序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素S1177010Cr17MoNb0.120.0400.03016.00~0.75~Nb5C～0.80S1177504Cr17Nb0.050.0400.03016.00~—0.030Nb12C～1.00S117900.120.0400.0300.6016.00~0.75~S1179806Cr17Mo0.080.0400.03016.00~0.90~S11862019Cr18MoTi0.0250.0400.0300.6016.00~0.75~0.025Ti,Nb,Zr或其组合8(C十N)～0.80S11863022Cr18Ti0.0300.0400.0300.5017.00~0.030Ti[0.20+4(C+N)]~Al0.15S11864022Cr18NbTi-10.0300.0400.0300.5017.00~0.030(Ti+Nb)[0.20十4(C+N)]～0.75Al0.15S11873022Cr18NbTi0.0300.0400.01517.50~Ti0.10～0.60Nb≥0.30+3CS11882019Cr18CuNb0.0250.0400.0300.6016.00~20.000.30~0.800.025Nb8(C+N)～0.80序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素S11892019Cr18Mo2Nb0.0250.0400.0300.6017.50~1.75~0.500.025Nb10(C+N)～0.80S11973022Cr19NbTi0.0300.0400.0300.5018.00~20.000.030Ti0.07～0.30Nb0.10～0.60(Ti+Nb)[0.20十4(C+N)7～0.80S11972019Cr19Mo2NbTi0.0250.0400.03017.50~1.75~0.035(Ti+Nb)[0.20十4(C+N)]～0.80S12182019Cr21CuTi0.0250.0300.03020.50~23.000.30~0.800.025Ti、Nb、Zr或其组合8(C十N)～0.80S12203022Cr220.0300.0400.0300.6020.00~23.00S12361019Cr23Mo2Ti0.0250.0400.03021.00~24.001.50~0.600.025Ti、Nb、Zr或其组合8(C十N)～0.80S12362019Cr23MoTi0.0250.0400.03021.00~24.000.70~0.600.025Ti、Nb、Zr或其组合8(C十N)～0.80S12462019Cr24Mo2NbTi0.0250.600.400.0300.0200.6023.00~25.002.00~0.600.025S125500.2000.0400.0300.6023.00~27.000.300.25—S12562019Cr25Mo4Ni4NbTi0.0250.750.0400.0303.50~4.5024.50~26.003.50~4.500.035(Ti+Nb)[0.20十4(C+N)]～0.80序号统一数字代号化学成分(质量分数)/%CMnPSNiN其他元素S12763022Cr27Mo4Ni2NbTi0.0300.0400.0301.00~25.00~28.003.00~4.000.040(Ti+Nb)0.20～1.00S12791008Cr27Mo0.0100.400.400.0300.0200.5025.00~27.500.75~0.200.015S12871012Cr28Ni4Mo2NbAl0.0150.550.500.0200.0053.00~4.0028.00~29.001.80~0.020Nb0.15～0.50(C十N)0.030Al0.10～0.30S12963022Cr29Mo4NbTi0.0300.0400.03028.00~30.003.60~4.200.045(Ti+Nb)0.20～1.00且(Ti十Nb)≥6(C十N)S12990008Cr29Mo40.0100.300.200.0250.0200.1528.00~30.003.50~4.200.150.020S12991008Cr29Mo4Ni20.0100.300.200.0250.0202.00~28.00~30.003.50~4.200.150.020S13091008Cr30Mo20.0100.400.400.0300.0200.5028.50~32.001.50~0.200.015注：表中所列成分除标明范围或最小值外，其余均为最大值序号统一数字代号化学成分(质量分数)/%CMnPSNiN其他元素S40310a0.150.500.0400.0300.6011.50~S41010a0.150.0400.0300.6011.50~S4103606Cr13Mn0.03~0.080.801.00~0.0350.0300.6011.50~0.040(C十N)0.04～0.10S41092a0.08~0.180.600.0400.0300.6011.50~0.30~0.600.30一S414000.150.0400.0301.25~11.50~S41427Y25Cr13Ni20.20~0.300.500.80~0.08~0.120.15~0.251.50~12.00~0.60S4159504Cr13Ni5Mo0.050.600.50~0.0300.0303.50~11.50~0.50~S41617Y12Cr130.150.0600.6012.00~0.60S42020a20Cr13a0.16~0.250.0400.0300.6012.00~S4203030Cr130.26~0.350.0400.0300.6012.00~S4204040Cr130.36~0.450.600.800.0400.0300.6012.00~0.60序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素Y30Cr130.26~12.00~0.60~12.50~0.65~12.50~0.05~60Cr13Mo0.56~12.50~0.25~0.28~12.00~0.50~22Cr14NiMo0.15~0.35~13.50~0.40~0.45~14.00~0.50~V0.10～0.2022Cr12NiWMoVa0.20~0.50~0.50~11.00~0.75~W0.75～1.25V0.20～0.400.10~1.40~10.50~0.35~V0.18～0.300.15~0.50~10.00~0.30~0.05~V0.10～0.40Nb0.20～0.600.11~1.50~16.00~序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素S43120a17Cr16Ni2a0.12~0.220.0400.0301.50~15.00~S43127aY16Cr16Ni2S0.12~0.200.0400.15~0.302.00~15.00~0.60S44040a80Cr2OSi2Nia0.75~0.851.75~0.20~0.600.0300.0301.15~19.00~20.50—0.30一S4407068Cr170.60~0.750.0400.0300.6016.00~0.75S4408085Cr170.75~0.950.0400.0300.6016.00~0.75一S44090a95Cr180.90~0.800.800.0400.0300.6017.00~S440960.95~0.0400.0300.6016.00~0.75S44097Y108Cr170.95~0.0600.6016.00~0.75S440980.95~0.800.800.0400.0300.6016.00~0.40~0.70S4409990Cr18MoV0.85~0.950.800.800.0400.0300.6017.00~1.00~V0.07～0.12注：表中所列成分除标明范围或最小值外，其余均为最大值。序号统一数字代号化学成分(质量分数)/%CMnPSNiMoN其他元素S51290a022Cr12Ni9Cu2NbTia0.0300.500.500.0400.0307.50~9.5011.00~0.501.50~Ti0.80～1.40Nb0.10～0.50S51293022Cr12Ni9Mo4Cu2AlTi0.0300.700.0300.0158.00~11.00~3.50~1.50~Al0.15～0.50Ti0.50～1.20S5138004Cr13Ni8Mo2Al0.050.100.200.0100.0087.50~8.5012.30~2.00~0.010Al0.90～1.35S51525a06Cr15Ni25Ti2MoAlVBa0.080.0400.03024.00~27.0013.50~1.00~Al0.35W1.90～2.35B0.001～0.010y0.10～0.50S5155005Cr15Ni5Cu4Nb0.070.0400.0303.50~14.00~2.50~4.50Nb0.15～0.45S51570a07Cr15Ni7Mo2Ala0.090.0400.0306.50~14.00~2.00~Al0.75～1.50S51740a05Cr17Ni4Cu4Nba0.070.0400.0303.00~15.00~3.00~Nb0.15～0.45S5175009Cr17Ni5Mo3N0.07~0.110.500.50~0.0400.0304.00~16.00~2.50~0.07~0.13S51770a07Cr17Ni7Ala0.090.0400.0306.50~16.00~Al0.75～1.50S5177806Cr17Ni7AlTia0.080.0400.0306.00~16.00~Al0.75～1.50Ti0.40～1.20注：表中所列成分除标明范围或最小值外，其余均为最大值。25(规范性)A.1不锈钢牌号的表示方法一般用两位阿拉伯数字表示碳含量(以万分之几计),但对碳含量不大于0.030%的超低碳不锈a)只规定上限者，如碳含量上限不大于0.10%,则取其上限的3/4表示碳含量(见示例1);如碳含量上限大于0.10%,则取其上限的4/5表示碳含量(见示例2)。示例1:碳含量上限为0.08%时，以06表示其含量；碳含量上限为0.030%时，以022表示其含量；碳含量上限为0.020%示例2:碳含量上限为0.20%时，以16表示其含量；碳含量上限为0.15%时，以12表示其含量。示例3:A.1.3.1用一位或两位阿拉伯数字表示主元素(碳元素除外)的平均含量(以百分之几计),若主元素的A.1.3.2主元素(碳元素除外)宜按元素含量递减排序。若两个或两个以上元素的平均含量相等时，则示例1:碳含量不大于0.08%、铬含量为18.00%～20.00%、镍含量为8.00%～11.00%的不锈钢，其中碳含量以06表示，铬含量平均值为19%,镍含量平均值为9.5%修约为10%,则其牌号表示为06Cr19Ni10。示例2:平均值为6.5%修约为6%,氮含量平均值为0.22%(不标明含量),则其牌号表示为022Ni24Cr21Mo6N,而不示例3:26GB/T20878—2024示例4:022Cr18NbTi-1与022Cr18NbTi。A.2不锈钢牌号的统一数字代号表示方法A.2.1不锈钢牌号的统一数字代号ISC(Ironandsteelcode)采用英文字母符号“S”作前缀(“Stainless”的首字母),后接五位阿拉伯数字，其编号规则见图A.1。S前缀字母S:代表不锈钢第一位数字：1——铁素体不锈钢，2——奥氏体-铁素体(双相)不锈钢，3——奥氏体不锈钢，4——马氏体不锈钢，5——沉淀硬化不锈钢X第五位数字表示同一钢组内不同牌号的区别顺序号第四位数字表示同一钢组内含有特殊元素(如S、Ti、Nb、A1、Cu、Mo、Mn)或区别顺序号第二、三位数字(或与第一位数字组合)表示不同钢组或主元素含量第四位数字代表的含义0123456789顺序号顺序号加Se、Ce、Pb、 Ca或顺序号顺序号加A1、Si(或AlTi、NbTi)第五位数字代表的含义0123456789顺序号极低碳钢w(C)≤0.01%或顺序号超低碳钢w(C)≤0.025%或顺序号超低碳钢w(C)≤0.030%顺序号顺序号顺序号易切削钢或顺序号低碳钢w(C)≤0.08%耐热或顺序号若同一组两个牌号的统一数字代号相同，则建议调整第五位数字加以区别。示钢中含有特殊元素(见示例1),第五位数字表示钢类或同一钢组内牌号的顺序号(见示例2)。示例1:019Cr18MoTi,统一数字代号ISC为S11862,其中第一位数字1代表铁素体不锈钢，第二、三位数字18表示铬的平均含量，第四位数字6表示加Ti,第五位数字2表示超低碳钢(碳含量不大于0.025%)。示例2:022Cr11Ti和022Cr11NiNbTi两个牌号的统一数字代号ISC均为S11163,为了区分将022Crl1NiNbTi第五位数字由3改为4,即022Crl1NiNbTi牌号的统一数字代号ISC为S11164。A.2.3奥氏体-铁素体(双相)不锈钢S2××××,前四位数字借用美国AISI或UNS体系中四位数字(见示例1和示例2);否则，第二、三位数字表示铬的平均含量(以百分之几计),第四位数字表示钢中含27示例1:022Cr23Ni4MoCuN,统一数字代号为S23043,其中前四位数字2304借用美国AISI体系2304的四位数字，第五位数字3表示超低碳钢(碳含量不大于0.030%)。示例2:022Cr25Ni7Mo4CuN,统一数字代号为S25203,其中前四位数字2520借用美国UNS体系S32520中后四位数字，第五位数字3表示超低碳钢(碳含量不大于0.030%)。示例3:示例4:12Cr21Ni5Ti,统一数字代号ISC低铬系列(铬含量上限一般不大于16.5%);2——低镍系列(对应于美国AISI或UNS体系中204系列):3锰含量约为5%～8%(对应于美国AISI或UNS体系中201系列):4锰含量约为7%~10%系列(对应于美国AISI或UNS体系中202系列);5——锰含量约为10%～13%(锰含量高于美国AISI或UNS体系中202系列);6——镍含量低于美国AISI或UNS体系中202系列；7——高铬高镍示例1:(对应于AISI的304),第四位数字0表示顺序号，第五位数字8表示低碳钢(碳含量不大于0.08%)。示例2:022Ni25Cr21Mo7N,统一数字代号ISC为S38367,其中第一位数字3代表奥氏体不锈钢，后面四位数字8367借用UNS的N08367中后四位数字。示例3:12Cr17Mn6Ni5N,统一数字代号ISC为S35350,其中353代表Cr-Mn-Ni-N钢组，其中第三位数字3表示锰含量约为5%～8%(对应于AISI201),第四位数字5表示加氮，第五位数字0为顺序号。示例1:Y12Cr13,统一数字代号ISC为S41617,其中第一位数字4代表马氏体不锈钢，第一、二、三位数字416表示钢组(对应于AISI的416),第四数字1表示顺序号，第五位数字7表示易切削钢。示例2:A.2.6沉淀硬化不锈钢S5××××,第二、三、四、五位数字按Cr-Ni二元素及其含量编号，其中第二、28示例1:06Ni25Cr15Ti2MoAlVB,统一数字代号ISC为S51525,其中第一位数字5代表沉淀硬化不锈钢，第二、三位数字15示例2:05Cr15Ni5Cu4Nb,统一数字代号ISC为S51550,其中第一位数字5代表沉淀硬化不锈钢，第二、三位数字15表示铬表B.1给出了本文件部分不锈钢牌号的物理性能参数。CB/T20878-2024CB/T20878-2024序号统一数字代号密度pkg/dm³在下列温度(℃)的弹性20℃至下列温度(℃)的平均线膨胀系数α热导率λ比热容c电阻率p可磁化400400奥氏体不锈钢1S30103022Cr17Ni7——0.500.73否2S301100.500.73否3S30153022Cr17Ni7N0.500.73否4S3021012Cr18Ni9a0.500.73否5S3024012Cr18Ni9Si3a0.500.73否6S30317Y12Cr18Ni90.500.73否7S30327Y12Cr18Ni9Se0.500.73否8S30387Y12Cr18Ni9Cu30.500.72否9S30403022Cr19Ni100.500.73否S3040806Cr19Ni10a0.500.73否S3040907Cr19Ni10a0.450.71否S3045005Cr19Ni10Si2CeNa0.500.85否20878-202420878-2024序号统一数字代号kg/dm³在下列温度(℃)的弹性20℃至下列温度(℃)的平均线膨胀系数a热导率λ比热容c电阻率可磁化400400S30453022Cr19Ni10N0.500.73否S3045806Cr19Ni10N0.500.73否S3047806Cr19Ni9NbN0.500.73否S3048006Cr18Ni9Cu20.500.73否S30483022Cr18Ni9Cu30.500.73否S3048806Cr18Ni9Cu30.500.72否S30489a10Cr18Ni9NbCu3BNa否S3050806Cr18Ni120.500.73否S3051010Cr18Ni120.500.73否S30548a06Cr18Ni13Si4a0.50否S30549a16Cr20Ni14Si20.500.85否S30808a06Cr20Ni11a8.000.500.72否S3082908Cr21Nil1Si2NCe0.500.85否S30908a06Cr23Ni13a0.500.78否S30920a16Cr23Ni13a0.500.78否S30989a07Cr23Ni15Cu4NbNBa0.48否S31002012Cr25Ni200.450.85否S31008a06Cr25Ni20a0.500.85否S31009a07Cr25Ni200.500.85否S31020a20Cr25Ni20a0.500.85否CB/T20878-2024表B.1本文件部分不锈钢牌号的物理性能参数CB/T20878-2024序号统一数字代号kg/dm在下列温度(℃)的弹性20℃至下列温度(℃)的平均线膨胀系数a热导率λ比热容c 电阻率可磁化400400S31053022Cr25Ni22Mo2N0.500.80否S31059a07Cr25Ni21NbNa否S31089a07Ni25Cr22W4Cu3CoNbNBa8.10否S31092015Ni26Cr25Mo5Cu2N8.100.450.85否S31252015Cr20Ni18Mo6CuN8.030.500.85否S31292015Ni27Cr22Mo7CuN8.020.45否S31293022Cr24Ni22Mo6Mn3W2Cu2N8.200.45否S31400a16Cr25Ni20Si2a0.500.90否S31603022Cr17Ni12Mo20.500.75否S31608a06Cr17Ni12Mo2a0.500.75否S31609a07Cr17Ni12Mo2a0.500.75否S31653022Cr17Ni12Mo2N0.500.75否S31655C022Cr20Ni9MoNc0.590.79否S3165806Cr17Ni12Mo2N0.500.73否S31668a06Cr17Ni12Mo2Tia0.500.75否S3167806Cr17Ni12Mo2Nb0.500.75否S31683022Cr18Ni14Mo2Cu20.500.74否S3168806Cr18Ni12Mo2Cu20.500.74否S31703022Cr19Ni13Mo30.500.79否S31708a06Cr19Ni13Mo3a0.500.74否20878-202420878-2024序号统一数字代号kg/dm³在下列温度(℃)的弹性20℃至下列温度(℃)的热导率λ比热容c电阻率可磁化400400S31723022Cr19Ni16Mo5N0.500.85否S31753022Cr19Ni13Mo4N0.500.75否S3179403Cr18Ni16Mo58.000.50否S32050022Cr23Ni21Mo6N8.10否S32053022Ni25Cr23Mo6N8.10否S32168a06Cr18Ni11Tia0.500.73否S32169a07Cr19Ni11Tia0.500.73否S32652015Cr24Ni22Mo8Mn3CuN8.000.500.78否S34553022Cr24Ni17Mo5Mn6NbN8.000.450.92否S34778a06Cr18Ni11Nba8.030.500.73否S34779a07Cr18Nil1Nba8.030.500.73否S3510010Cr16Mn9Ni2Cu2N0.570.77否S3510112Cr15Mn10Ni2CuN0.500.66否S3510212Cr15Mn10Ni2N0.500.66否S3515020Cr15Mn15Ni2N0.70否S3518012Cr15Mn8Ni5Cu2N0.500.73否S3523012Cr17Mn8Ni2N0.500.62否S3525012Cr17Mn7Ni2Cu2N0.500.62否S3525712Cr17Mn10Ni2N0.500.62否S3528408Cr17Mn7Ni2Cu2N0.500.73否CB/T20878-2024表B.1本文件部分不锈钢牌号的物理性能参数CB/T20878-2024序号统一数字代号kg/dm在下列温度(℃)的弹性20℃至下列温度(℃)的平均线膨胀系数a热导率λ比热容c电阻率p可磁化400400S3528508Cr17Mn6Ni3Cu3N0.530.77否S3535012Cr17Mn6Ni5N0.500.70否S35355022Cr17Mn7Ni5N0.500.70否S3538806Cr18Mn7Ni4CuN0.500.70否S3545012Cr18Mn8Ni5N0.500.70否S3550012Cr18Mn12Ni2N0.500.80否S3551012Cr19Mn11Ni2CuN0.500.75否S3555403Cr19Mn12Ni3N0.500.75否S3555512Cr19Mn12Ni2N0.500.75否S3565605Cr19Mn6Ni5Cu2N0.500.70否S3565708Cr19Mn6Ni3Cu2N0.500.72否S3570605Cr20Ni7Mn4N0.590.74否S3588605Cr19Ni6Mn4Cu2MoN0.590.74否S3588705Cr21Ni10Mn3Cu2Mo2N0.590.79否S38367022Ni24Cr21Mo6N8.06否S3840003Ni18Cr168.03否S3840806Ni18Cr168.030.50否S38926015Ni25Cr20Mo6CuN8.100.45否S39042015Cr21Ni26Mo5Cu28.050.45否20878-202420878-2024序号统一数字代号kg/dm³在下列温度(℃)的弹性20℃至下列温度(℃)的热导率λ比热容c电阻率可磁化奥氏体-铁素体(双相)不锈钢022Cr20Mn5Ni2N是022Cr21Ni4Mo2N是022Cr21Mn2Ni2MoN是03Cr22Mn5Ni2CuMoN是022Cr19Ni5Mo3Si2N是022Cr23Ni2N是022Cr23Ni5Mo3N是022Cr21Mn3Ni3Mo2N是是022Cr22Ni5Mo3N是022Cr24Ni4Mn3Mo2CuN是022Cr25Ni6Mo2N是022Cr25Ni7Mo3WCuN是019Cr25Ni7Mo4Cu2WN是022Cr25Ni7Mo3W2CuN是022Cr23Ni4MoCuN是022Cr25Ni7Mo4N是022Cr25Ni7Mo4Cu2N是03Cr25Ni6Mo3Cu2N是CB/T20878-2024表B.1本文件部分不锈钢牌号的物理性能参数CB/T20878-2024序号统一数字代号kg/dm在下列温度(℃)的弹性20℃至下列温度(℃)的平均线膨胀系数a热导率λ比热容c电阻率p可磁化400400S27073022Cr28Ni8Mo4CoN0.470.80是S27603022Cr25Ni7Mo4WCuN0.500.80是S2900806Cr26Ni4Mo2是S29063022Cr29Ni7Mo2MnN一0.470.80是S29503022Cr28Ni4Mo2N是铁素体不锈钢S11163022Cr11Tia0.460.60是S11164022Cr11NiNbTi0.460.60是S1116806Crl1Tia0.460.60是S11173022Crl1NbTia是S1117604Cr11Nb————是S11203022Cr12a0.46是S11213022Cr12Nia0.430.60是S1130606Cr130.46是S1134806Cr13Ala0.46是S1146806Cr14Ni2MoTi0.46是20878-202420878-2024序号统一数字代号kg/dm³在下列温度(℃)的弹性20℃至下列温度(℃)的平均线膨胀系数a热导率λ比热容c电阻率p可磁化400400S115100.46是S11573022Cr15NbTi0.46是S117100.46是S11717Y10Cr170.460.60是S11763022Cr17NbTi0.430.70是S1177010Cr17MoNb0.440.70是S1177504Cr17Nb0.460.60是S11790—0.460.60是S1179806Cr17Mo0.460.70是S11862019Cr18MoTi0.460.60是S11863022Cr18Ti0.460.60是S11864022Cr18NbTi-10.460.60是S11873022Cr18NbTi0.460.60是S11882019Cr18CuNb0.460.60是S11892019Cr18Mo2Nb0.390.65是S11973022Cr19NbTi0.460.60是S11972019Cr19Mo2NbTi0.430.80是CB/T20878-2024表B.1本文件部分不锈钢牌号的物理性能参数CB/T20878-2024序号统一数字代号kg/dm在下列温度(℃)的弹性20℃至下列温度(℃)的平均线膨胀系数a热导率λ比热容c电阻率p可磁化400400S12182019Cr21CuTi0.46是S12203022Cr220.440.62是S12361019Cr23Mo2Ti0.430.80是S12362019Cr23MoTi0.430.80是S12462019Cr24Mo2NbTi0.430.80是S125500.500.70是S12562019Cr25Mo4Ni4NbTi——0.40是S12763022Cr27Mo4Ni2NbTi——是S12791008Cr27Mo0.460.64是S12871012Cr28Ni4Mo2NbAl—是S12963022Cr29Mo4NbTi是S12990008Cr29Mo4———是S12991008Cr29Mo4Ni20.45是S13091008Cr30Mo20.460.56是马氏体不锈钢S40310a0.460.57是20878-202420878-2024序号统一数字代号kg/dm³在下列温度(℃)的弹性20℃至下列温度(℃)的平均线膨胀系数α热导率λ比热容c 电阻率可磁化400400S41010a0.460.60是S4103606Cr13Mn0.460.58是S41092是S4159504Cr13Ni5Mo0.460.60是S41617Y12Cr130.460.60是S42020a20Cr130.460.60是S4203030Cr130.460.55是S4204040Cr130.460.55是S42037Y30Cr130.460.55是S4206065Cr130.420.51是S4209070Cr13Mo0.390.53是S4209660Cr13Mo0.460.62是S4209732Cr13Mo0.460.62是S4209950Cr15MoV0.460.65是S42210a13Crl1Ni2W2MoVa0.48是S43110a14Cr17Ni2a0.460.72是S43120a17Cr16Ni2a0.460.70是S4407068Cr170.460.60是CB/T20878-2024表B.1本文件部分不锈钢牌号的物理性能参数CB/T20878-2024序号统一数字代号kg/dm在下列温度(℃)的弹性20℃至下列温度(℃)的平均线膨胀系数a热导率λ比热容c电阻率p可磁化S4408085Cr17是S44090a95Cr18是S44096是S44097Y108Cr17是S44098是S4409990Cr18MoV是沉淀硬化不锈钢S51290a022Cr12Ni9Cu2NbTia—是S5138004Cr13Ni8Mo2Al是S51525a06Cr15Ni25Ti2MoAlVBa无S5155005Cr15Ni5Cu4Nb是S51570a07Cr15Ni7Mo2Ala是S51740a05Cr17Ni4Cu4Nb是S5175009Cr17Ni5Mo3N是S51770a07Cr17Ni7Ala是S5177806Cr17Ni7AlTia是可作耐热钢使用。古序号统一数字代号ISC代号ISC曾用牌号美国ASTMA959TypeUNS日本JIS国际Name欧洲NameNumberFOCT5632奥氏体不锈钢1S30103022Cr17Ni7—S30103SUS301L2S30110S30100SUS301X12CrNi17-74310-301-09-X3S30153022Cr17Ni7N301LNS30153SUS301LX2CrNiN18-74318-301-53-IX2CrNiN18-74S3021012Cr18Ni9aS30200SUS302X9CrNi18-94325-302-00-EX9CrNi18-95S3024012Cr18Ni9Si3a1Cr18Ni9Si3S30215SUS302BX12CrNiSi18-9-34326-302-15-I6S30317Y12Cr18Ni9Y1Cr18Ni9S30300SUS303X10CrNiS18-94305-303-00-IX8CrNiS18-97S30327Y12Cr18Ni9SeY1Cr18Ni9Se303SeS30323SUS303SeX12CrNiSe18-94625-303-23-XX12CrNiSe18-9七序号统一数字代号代号ISC曾用牌号美国ASTMA959TypeUNS日本JIS国际Name欧洲NameNumberFOCT56328S30387Y12Cr18Ni9Cu3—SUS303CuX12CrNiCuS18-9-34667-303-76-JX12CrNiCuS18-9-39S30403022Cr19Ni1000Cr19Ni10S30403SUS304LX2CrNi19-114306-304-03-IX2CrNi19-1103X18H11S3040806Cr19Ni10a0Cr18Ni9S30400SUS304X5CrNi18-104301-304-00-IX5CrNi18-10S3040907Cr19Ni10a——S30409SUH304HX7CrNi18-94948-304-09-IX6CrNi18-10S3045005Cr19Ni10Si2CeNaS30415X6CrNiSiNCe19-104818-304-15-EX6CrNiSiNCe19-10S30453022Cr19Ni10N00Cr18Ni10N304LNS30453SUS304LNX2CrNiN18-94311-304-53-IX2CrNiN18-10S3045806Cr19Ni10N0Cr19Ni9NS30451SUS304N1X5CrNiN19-94315-304-51-IX5CrNiN19-9S30478———06Cr19Ni9NbN0Cr19Ni10NbNXM-21S30452SUS304N2S3048006Cr18Ni9Cu20Cr18Ni9Cu2SUS304J3X6CrNiCul8-9-24567-304-98-XS30483022Cr18Ni9Cu3—S30430X3CrNiCul8-9-44567-304-30-IX3CrNiCul8-9-4S3048806Cr18Ni9Cu30Cr18Ni9Cu3SUSXM7序号统一数字代号代号ISC曾用牌号美国ASTMA959TypeUNS日本JIS国际Name欧洲NameNumberS3048910Cr18Ni9NbCu3BNaS30432———S3050806Cr18Ni120Cr18Ni12SUS305J1S3051010Cr18Ni121Cr18Ni12S30500SUS305X6CrNi18-124303-305-00-IX4CrNi18-1212X18H12TS30548S3814806Cr18Ni13Si4a0Cr18Ni13Si4SUSXM15J1X06CrNiSi18-13-44884-305-00-XS30549S3824016Cr20Ni14Si2a1Cr20Ni14Si2X15CrNiSi20-124828-305-09-IX15CrNiSi20-1220X20H14C2S3064020Cr18Ni15Si4AlS30615S3080806Cr20Ni11—S30800SUS308—S3085020Cr21Ni12Na—SUH37X20CrNi22-114824-308-09-JX20CrNi22-11S3085908Cr21Ni11Si2NCea08Cr21Ni11Si2CeNS30815X9CrNiSiNCe21-11-2S30908—06Cr23Ni13a0Cr23Ni13S30908SUS309SX6CrNi23-134950-309-08-EX6CrNi23-13S3092016Cr23Ni13a2Cr23Ni13S30900SUH309X12CrNi23-134833-309-08-IX12CrNi23-1320X23H12S30989——07Cr23Ni15Cu4NbNBa07Cr23Ni15Cu4NbN————————无序号统一数字代号ISC代号ISC曾用牌号美国ASTMA959TypeUNS日本国际Name欧洲NameNumberS31002012Cr25Ni20 S31002X1CrNi25-214335-310-02-IX1CrNi25-21S3100806Cr25Ni20a0Cr25Ni20S31008SUS310SX6CrNi25-204951-310-08-IX6CrNi25-20S3100907Cr25Ni20a07Cr25Ni21S31009S3102020Cr25Ni20a2Cr25Ni20S31000SUH310X23CrNi25-214845-310-09-XX8CrNi25-2120X25H20C2S31053022Cr25Ni22Mo2N S31050一X1CrNiMoN25-22-2X1CrNiMoN25-2