Ⅳ（ISO）国际标准
◤ 结构钢：E185 E235A E235B E235C E235D E275A E275A E275B E275C E275D E355C E355D
◤ 合金钢：E355DD E355E E460CC E460DD E460E E460DD E460E E550DD E550E E690DD E690E
◤ 耐候钢：Fe235WB Fe235WC Fe235WD Fe355WIA Fe355W Fe355W2B Fe355W2C Fe355W2D
◤ 表面硬化结构钢：C10 C15E4 C15M2 20Cr4 20CrS4 16MnCr5 16MnCrS5 20MnCr5 20MnCrS5 20NiCrMo2 20NiCrMoS2 18CrNiMo7
◤ 表面硬化结构HH和HL钢：20Cr4H 20CrS4H 20Cr4HL 20CrS4HL 16MnCr5HH 16MnCrS5HH 16MnCr5HL 16MnCrS5HL 20MnCr5HH 20MnCrS5HH 20MnCr5HL 20MnCrS5HL 20NiCrMo2HH 20NiCrMoS2HH 20NiCrMo2HL 20NiCrMoS2HL 18CrNiMo7HH 18CrNiMo7HL
◤ 渗氮结构钢：31CrMo12 33CrAlMo54 41CrAlMo74
◤ 非合金调质结构钢：C18 C20 C20E4 C20M2 C25 C25E4 C25M2 C30 C30E4 C30M2 C35 C35E4 C35M2 C40 C40E4 C40M2 C45 C45E4 C45M2 C50 C50E4 C50M2 C55 C55E4 C55M2 C60 C60E4 C60M2
◤ 合金调质结构钢：28Mn6 36Mn6 42Mn6 34Cr4 34CrS4 37Cr4 37CrS4 41Cr4 41CrS4 25CrMo4 25CrMoS4 34CrMo4 34CrMoS4 42CrMo4 42CrMoS4 50CrMo4 36CrNiMo4 36CrNiMo6 31CrNiMo8 51CrV6
◤ 易切削结构钢：9S20 11SMn28 11SMnPb28 12SMn35 12SMnPb35 10S20 10SPb20 17SMn20 35S20 44SMn28 46S20
◤ 冷镦钢：CC4X CC4A CC8X CC8A CC11X CC11A CC15X CC15K CC15A CC21K CC21A CE10 CE15E4 CE16E4 CE20E4 20Cr4E 16MnCr5E 18CrMo4E 20NiCrMo2E CE20E4 CE28E4 CE35E4 CE40E4 CE45E4 42Mn6E 37Cr2E 46Cr2E 34Cr4E 37Cr4E 41Cr4E 36Mo3E 25CrMo4E 34CrMo4E 42CrMo4E 41CrNiMo2E 41NiCrMo7E 31CrNiMo8E CE20BG1 CE20BG2 CE28B CE35B 35MnB5E 37CrB1E
◤ 弹簧钢：38Si7 46Si7 51CrV4 52CrMoV4 55Cr3 55SiCr6-3 55SiCrV6-3 56SiCr7 60Cr3 60CrMo3-3 60Si8 61SiCr7
◤ 轴承钢：100Cr6 100CrMnSi4-4 100CrMnSi6-4 100CrMnSi6-6 100CrMo7 100CrMo7-3 100CrMo7-4 100CrMnMoSi8-4-6 20Cr3 20Cr4 20MnCr4-2 17MnCr5 19MnCr5 15CrMo4 20CrMo4 20MnCrMo4-2 20NiCrMo2 20NiCrMo7 18CrNiMo7-6 18NiCrMo14-6 16NiCrMo16-5 C56E 56Mn4 70Mn4 43CrMo4 X47Cr14 X65Cr14 X108CRMo17 X89CrMoV18-1 80MoCrV42-16 13MoCrNi42-16-14 X82WmoCrV6-5-4 X75WCrV18-4-1 数字牌号：B1 B2 B3 B4 B5 B6 B7 B8 B20 B21 B22 B23 B24 B25 B26 B27 B28 B29 B30 B31 B32 B40 B41 B41 B43 B50 B51 B52 B53 B60 B61 B62 B63
◤ 碳素结构钢：Fe490 Fe590 Fe600
◤ 低合金钢：E355CC E355DD E420CC E420DD E460CC E460DD E355M E355ML E420M E420ML E460M E460ML
◤ 高屈服高强度热轧薄板：HS355 HS390 HS460 HS490
◤ 冷作高强度钢：FeE315 FeE355 FeE420 FeE460 FeE500 FeE550 FeE650 FeE700 FeE260 FeE315 FeE490 260Y 300Y 340Y 380Y 420Y 490Y 550Y
◤ 耐候钢：HSA235WB HSA245WD HSA245WB HSA245WD HSA355W1A HSA355W1D HSA355W2C HSA355W2D HSA365WB HSA365WD
◤ 结构钢热轧：HR235 HR275 HR355
◤ 结构钢冷轧：CR220 CR250 CR320 CR550
◤ 合金钢：10CrMo9-10 12CrMo9-10 12CrMoV12-10 13CrMo4-5 13CrMoSi5-5 13CrMoV9-10 15NiCuMoNb5-6-4 16Mo3 18MnMo4-5 20MnMoNi4-5 P235GH P265GH P295GH P355GH X10CrMoVNb9-1 X12CrMo5 13CrMo9-10 13CrMoV12-10 14CrMo4-5 14CrMo9-10 14CrMoSi5-6 14CrMoV9-10 19MnMo4-5 19MnMo5-5 19MnMo6-5 19MnMoNi5-5 PT410GH TP450GH PT480GH X9CrMoVNb9-1
◤ 镍合金钢：11MnNi5-3 12Ni14 13MnNi6-3 15MnNi6 X7Ni9 X8Ni9 X12Ni5 13Ni14 14Ni9 14Ni14 X9Ni5 X9Ni9
◤ 容器用钢板：P355M P355ML1 P355ML2 P420M P420ML1 P420ML2 P460M P460ML1 P460ML2 PT400N PT400NH TP400NL1 PT440N PT440NL1 PT440NH PT490N PT490NL1 PT490ML3 PT520M PT520ML1 PT520ML3 PT550M PT550M11 P355Q P355QH P355QL1 P355QL2 P460Q P460QH P460QL1 P460QL2 P500Q P500QH P500QL1 P500L2 P690Q P690QH P690QL1 P690QL2 PT440QL2 PT490Q TP490QH PT490QL2 PT520Q PT520QH PT520QL2 PT570Q PT570QH
◤ 热轧钢：HR185 HR235 HR275 HR295 HR325 HR355
◤ 细晶粒承压钢：P355N P355NH P355NL P390N P390NH P390NL P420N P420NH P420NL P460N P460NH P460NL
◤ 热处理细晶粒承压钢：P420Q P420QH P420QL P460Q P460QH P460QL P500Q P500QH P500QL P550Q P550QH P550QL P620Q P620QH P620QL P690Q P690QH P690QL
◤ 承压无缝钢：TS360 TS410 TS430 TS500 PH23 PH26 PH29 PH35 8CrMo4-5 8CrMo5-5 9NiMnMoNb5-4-4 11CrMo9-10TA 11CrMo9-10TN-TT 12CrMo6-2 13CrMo4-5 16Mo3 X10CrMoVNb9-1 X11CrMo5TA X11CrMo9-1TN-TT X12CrMoNV11-1-1 PL21 PL23 PL25 PL26 11MnNi5-3 12Ni4 13MnNi6-3 26CrMo4 X10Ni9 X12Ni5
◤ 非合金承压焊管：TW320 TW360 TW410 TW430 TW500
◤ 钢筋：PB240 PB300 RB300 RR400 RB500 RB400W RB500W
