双相不锈钢分类、牌号及标准常用双相不锈钢牌号和各国牌号的近似值对照如下表:型号\国家中国美国瑞典德国法国日本低合金型00Ci23Ni4NUN23(SAF2304)SS232(SAF2304)W.Nr.1.4362UR35NDP11中合金型00Cr18Ni5Mo3Si200Cr22Ni5Mo3NUNSS31500UNSS31803SS2376(3RE60)SS2377(SAF2205)W.Nr.1.4417w.Nr.1.4462UR45NDP1DP8高合金型0Cr25Ni5Mo200Cr25Ni7Mo3WCuNUNSS32900UNSS31260SS2324(10RE51)W.Nr.1.4460W.Nr.1.4501329J1329J2L超级双相钢00Cr25Ni7Mo4N00Cr25Ni6Mo3CuNUNSS32750UNSS32550SS2328(SAF2507)W.Nr.1.4410W.Nr.1.4507UR47N+UR52N+双相不锈钢产品采用的相关标准:材质无缝和焊接管棒材板材带材锻件(法兰)铸件焊丝焊条双相不锈钢ASTMA789ASTMA790ASTMA450ASTMA530GB/T14976GB/T14975GB/T13296ASTMA276ASTMA479ASTMA484GB1220ASTMA240ASTMA182ASTMA788ASTMA351ASTMA995ASME/AWSA5.4ASME/AWSA5.9常用双相不锈钢的性能:1.化学成分(%)钢号C≤Mn≤Si≤S≤P≤CrNiMoCu≤NS32750(SAF2507)00Cr22Ni7Mo4N0.031.200.800.0200.03524.0/26.06.0/8.03.0/5.00.500.24/0.32S31803(SAF2205)00Cr22Ni5Mo3N0.032.001.00.020.03021.0/23.04.50/6.502.50/3.500.08/0.20S31500(3RE60)00Cr18Ni5Mo3Si20.031.2/2.001.4/2.000.0300.03018.0/19.04.25/5.252.50/2.000.05/0.102.机械性能:热处理制度℃Ab(Mpa)≥As(Mpa)≥∮≥布氏洛氏S32750(SAF2507)00Cr22Ni5Mo3N1025-1125水8005501531032S31803(SAF2205)00Cr22Ni5Mo3N1020-11006204502529030.5S31500(3RE60)00Cr18Ni5Mo3Si2980-10406304403029030.53.金相组织本公司的内控标准对相比例作出规定,固溶状态下的金相组织为铁素体相-奥氏体双相。其奥氏体相的含量为40%-60%。金相组织中不允许有0相等脆性相的析出。4.双相不锈钢的连续使用温度范围为-50℃-60℃。热加工温度应不低于950℃。双相不锈钢化学成分双相不锈钢化学成分(%)钢号C≤Mn≤Si≤S≤P≤CrNiMoCu≤NS32750(SAF2507)00Cr22Ni7Mo4N0.031.200.800.0200.03524.0/26.06.0/8.03.0/5.00.500.24/0.32S31803(SAF2205)00Cr22Ni5Mo3N0.032.001.00.020.03021.0/23.04.50/6.502.50/3.500.08/0.20S31500(3RE60)00Cr18Ni5Mo3Si20.031.2/2.001.4/2.000.0300.03018.0/19.04.25/5.252.50/2.00