鋼質等級

鋼質等級，也称钢铁牌号，是由标准组织制定的，用于对各种钢铁产品进行分类标识的方法。
分級的標準首先是化學成分中減少不必要的雜質，分成普通鋼和優質鋼，合格的普通鋼中磷和硫含量少於約萬分之五級，更少便是優質鋼，優質鋼又細分優質鋼和高級優質鋼，後者還可以再細分。
然後是對各種材料性能的測驗，各地和國際都制定一些標準方便用家。
例如：
国际标准化组织 ISO/TS 4949:2003
歐洲標準委員會 EN 10027
中华人民共和国国家标准 GB/T 221
| EN steel number (欧洲)> 碳钢 | EN steel name (欧洲)> 碳钢 | ASTM grade (美国)> 碳钢 | AISI/SAE grade (美国)> 碳钢 | UNS (美国)> 碳钢 | DIN (德国)> 碳钢 | BS (英国)> 碳钢 | UNI (意大利)> 碳钢 | JIS (日本)> 碳钢 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1.1141 1.0401 1.0453 | C15D C18D |  | 1010 1018 |  | CK15 C15 C16.8 | 040A15 080M15 080A15 EN3B | C15 C16 1C15 | S12C S15 S15CK S15C |
| 1.0503 1.1191 1.1193 1.1194 | C45 |  | 1045 |  | C45 CK45 CF45 CQ45 | 060A47 080A46 080M46 | C45 1C45 C46 C43 | S45C S48C |
| 1.0726 1.0727 | 35S20 45S20 |  | 1140/1146 |  | 35S20 45S20 | 212M40 En8M |  |  |
| 1.0715 1.0736 | 11SMn37 |  | 1215 |  | 9SMn28 9SMn36 | 230M07 En1A | CF9SMn28 CF9SMn36 | SUM 25 SUM 22 |
| 1.0718 1.0737 | 11SMnPb30 11SMnPb37 |  | 12L14 |  | 9SMnPb28 9SMnPb36 | 230M07 Leaded En1B Leaded | CF9SMnPb29 CF9SMnPb36 | SUM 22 SUM 23 SUM 24 |
| 1.1555 | C120U |  |  |  | C125W | BW1C | C120KU | SK2 |
合金钢
| 1.7218 |  |  | 4130 |  | 25CrMo4 GS-25CrMo4 | 708A30 CDS110 | 25CrMo4 (KB) 30CrMo4 | SCM 420 SCM 430 SCCrM1 |
| 1.7223 1.7225 1.7227 1.3563 | 42CrMo4 |  | 4140/4142 |  | 41CrMo4 42CrMo4 42CrMoS4 43CrMo4 | 708M40 708A42 709M40 En19 En19C | 41CrMo4 38CrMo4 (KB) G40 CrMo4 42CrMo4 | SCM 440 SCM 440H SNB 7  SCM 4M SCM 4 |
| 1.6582 1.6562 | 34CrNiMo6 |  | 4340 |  | 34CrNiMo6 40NiCrMo8-4 | 817M40 En24 | 35NiCrMo6 (KB) 40NiCrMo7 (KB) | SNCM 447 SNB24-1-5 |
| 1.6543 1.6523 | 20NiCrMo2-2 |  | 8620 |  | 21NiCrMo22 21NiCrMo2 | 805A20 805M20 | 20NiCrMo2 | SNCM 200 (H) |
| 1.5415 | 16Mo3 | A240 A/B/C |  | K12822 K12320 K12020 K11820 | 15Mo3 | 1503-243B 240 243 | 15Mo3 16Mo3 | STBA12 |
不锈钢
| 1.4310 | X10CrNi18-8 |  | 301 | S30100 |  |  |  |  |
| 1.4318 | X2CrNiN18-7 |  | 301LN |  |  |  |  |  |
| 1.4305 | X8CrNiS18-9 |  | 303 | S30300 | X10CrNiS18-9 | 303S 31 En58M | X10CrNiS18-09 | SUS 303 |
| 1.4301 | X2CrNi19-11 X2CrNi18-10 |  | 304（英语：） | S30400 | X5CrNi18-9 X5CrNi18-10 XCrNi19-9 | 304S 15 304S 16 304S 18 304S 25 En58E | X5CrNi18-10 | SUS 304 SUS 304-CSP |
| 1.4306 | X2CrNi19-11 |  | 304L | S30403 |  | 304S 11 |  | SUS304L |
| 1.4311 | X2CrNiN18-10 |  | 304LN | S30453 |  |  |  |  |
| 1.4948 | X6CrNi18-11 |  | 304H | S30409 |  |  |  |  |
| 1.4303 | X5CrNi18-12 |  | 305 | S30500 |  |  |  |  |
| 1.4401 1.4436 | X5CrNiMo17-12-2 X5CrNiMo18-14-3 |  | 316 | S31600 | X5CrNiMo17 12 2 X5CrNiMo17 13 3 X5CrNiMo 19 11 X5CrNiMo 18 11 | 316S 29 316S 31 316S 33 En58J | X5CrNiMo17 12 X5CrNiMo17 13 X8CrNiMo17 13 | SUS 316 SUS316TP |
| 1.4404 | X2CrNiMo17-12-2 |  | 316L（英语：） | S31603 |  | 316S 11 |  | SUS316L |
| 1.4406 1.4429 | X2CrNiMoN17-12-2 X2CrNiMoN17-13-3 |  | 316LN | S31653 |  |  |  |  |
| 1.4571 |  |  | 316Ti | S31635 | X6CrNiMoTi17-12 | 320S 33 |  |  |
| 1.4438 | X2CrNiMo18-15-4 |  | 317L | S31703 |  |  |  |  |
| 1.4541 |  |  | 321 | S32100 | X6CrNiTi18-10 | 321S 31 |  | SUS321 |
| 1.4848 | GX40CrNiSi25-20 | A351 HK40 |  | J94204 | SEW 595 GX40CrNiSi25-20 | 310C40 |  | SCH22 |
| 1.4859 | GX10NiCrSiNb32-20 |  |  | N08151 | GX10NiCrSiNb32-20 |  |  |  |
| 1.4878 | X12CrNiTi18-9   X8CrNiTi18-10 |  | 321H | S32109 |  |  |  |  |
| 1.4906 | X7CrNiNb18-10 |  | 347H | S34709 |  |  |  |  |
| 1.4512 | X6CrTi12 |  | 409 | S40900 |  |  |  | SUH409 |
|  |  |  | 410 | S41000 |  |  |  |  |
| 1.4016 |  |  | 430 | S43000 | X6Cr17 | 430S 17 |  | SUS430 |
|  |  |  | 440A | S44002 |  |  |  |  |
| 1.4112 |  |  | 440B | S44003 |  |  |  |  |
| 1.4125 |  |  | 440C（英语：） | S44004 | X105CrMo17 |  |  | SUS440C |
| 1.4104 |  |  | 430F | S44020 | X14CrMoS17 |  |  | SUS430F |
| 1.4057 | X17CrNi16-2 |  | 431 X | S43100 | X16CrNi16 | 431S 29 |  | SUS431 |
| 1.5423 | 16Mo5 | A335 P1 | 4520 4419H 4419 | K11522 | 16Mo5 |  |  | STPA12 |
| 1.7715 | 14MoV6-3 | A335 P2 |  | K11547 | 14MoV6-3 | 660 |  | STPA20 |
| 1.7335 1.7338 | 13CrMo4-5 10CrMo5-5 | A335 P11 |  | K11597 |  |  |  | STPA23 |
| 1.7375 1.7380 1.7383 | 10CrMo9-10 11CrMo9-10 12CrMo9-10 | A335 P22 |  | K21590 | 17175 10CrMo910 |  |  | STPA24 |
| 1.7362 1.7366 | X11CrMo5 X12CrMo5 12CrMo19-5 | A335 P5 | 501 502 | K41545 S50100 S50200 |  |  |  | STPA25 |
| 1.7386 | X11CrMo9-1 X12CrMo9-1 | A335 P9 | 503 | S50400 S50488 K90941 |  |  |  | STPA26 |
| 1.4903 | X10CrMoVNbN9-1 | A335 P91 |  | K91560 | X10CrMoVNbN9-1 |  |  |  |
| 1.4905 1.4906 | X11CrMoWVNb9-1-1 X12CrMoWVNbN10-1-1 | A335 P92 |  | K92460 | X11CrMoWVNb9-1-1 X12CrMoWVNbN10-1-1 |  |  |  |

| 1.4539 | X1NiCrMoCu25-20-5 |  | 904L | N08904 |  |  |  |  |
| 1.4547 | X1CrNiMoCuN20-18-7 |  |  | S31254 |  |  |  |  |
| 1.4565 |  |  | NIT50 | S20910 |  |  |  |  |
|  |  |  | NIT60 | S21800 |  |  |  |  |
工具钢
| 1.2363 | X100CrMoV5 |  | A-2 | T30102 | X100CrMoV51 | BA 2 | X100CrMoV5-1 KU | SKD 12 |
|  |  |  | A-3 | T30103 |  |  |  |  |
|  |  |  | A-4 | T30104 |  |  |  |  |
|  |  |  | A-6 | T30106 |  |  |  |  |
|  |  |  | A-7 | T30107 |  |  |  |  |
|  |  |  | A-8 | T30108 |  |  |  |  |
|  |  |  | A-9 | T30109 |  |  |  |  |
| 1.2365 | X32CrMoV3-3 32CrMoV12-28 |  | H10 | T20810 | X32CrMoV3-3 32CrMoV12-28 |  |  | SKD 7 |
| 1.2379 | X153CrMoV12 |  | D-2 |  | X153CrMoV12-1 | BD 2 | X155CrVMo12-1 | SKD 11 |
| 1.2510 |  |  | O-1 |  | 100MnCrW4 | Bo 1 | 95MnWCr-5 KU |  |