References Steel and Non-Ferrous Metal Symbols Chart l Carbon Steels l High Speed Steels l Austenitic Stainless Steels JIS AISI DIN JIS AISI DIN JIS AISI DIN S10C 1010 C10 SKH2 T1 — SUS201 201 — S15C 1015 C15 SKH3 T4 S18-1-2-5 SUS202 202 — S20C 1020 C22 SKH10 T15 S12-1-4-5 SUS301 301 X12CrNi17 7 S25C 1025 C25 SKH51 M2 S6-5-2 SUS302 302 — S30C 1030 C30 SKH52 M3–1 — SUS302B 302B — S35C 1035 C35 SKH53 M3–2 S6-5-3 SUS303 303 X10CrNiS18 9 S40C 1040 C40 SKH54 M4 — SUS303Se 303Se — S45C 1045 C45 SKH56 M36 — SUS304 304 X5CrNiS18 10 S50C 1049 C50S55C1055C55l Alloy Tool Steels SUS304L 304L X2CrNi19 11SUS304NI304N— SKS11 F2 — SUS305 305 X5CrNi18 12 l Ni-Cr-Mo Steels SKS51 L6 — SUS308 308 — SNCM220 8620 21NiCrMo2 SKS43 W2-9 1/2 — SUS309S 309S — SNCM240 8640 — SKD1 D3 X210Cr12 SUS310S 310S — SNCM415 — — SKD11 D2 X155CrVMo12-1 SUS316 316 X5CrMo17 12 2 SNCM420 4320 — SKD61 — X40CrVMo5-1 SUS316L 316L X2CrNiMo17 13 2 SNCM439 4340 40NiCrMo6 l Grey Cast Iron SUS316N 316N — SNCM447 — 34NiCrMo6 FC100 No 20B GG-10 SUS317 317 — l Cr Steels FC150 No 25B GG-15 SUS317L 317L X2CrNiMo18 16 4 SCr415 — 15CrMo5 FC200 No 30B GG-20 SUS321 321 X6CrNiTi18 10 SCr420 5120 20Cr4 FC250 No 35B GG-25 SUS347 347 X6CrNiNb18 10 SCr430 5130 34Cr4 FC300 No 45B GG-30 SUS384 384 — SCr435 5132 37Cr4 FC350 No 50B GG-35 l Heat Resisting Steels SCr440 5140 41Cr4 l Nodular Cast Iron SUH31 — — SCr445 5147 — FCD400 60-40-18 GGG-40 SUH35 — — l Cr-Mo Steels FCD450 — GGG-40.3 SUH36 — X53CrMnNi21 9 SCM415 — 15CrMo5 FCD500 80-55-06 GGG-50 SUH37 — — SCM420 — 20CrMo5 FCD600 — GGG-60 SUH38 — — SCM430 4131 25CrMo4 FCD700 100-70-03 GGG-70 SUH309 309 — SCM435 4137 34CrMo4 SUH310 310 CrNi2520 SCM440 4140 42CrMo4 SUH330 N08330 — SCM445 4145 — l Ferritic Heat Resisting Steels l Mn Steels and Mn-Cr Steels for l Ferritic Stainless Steels SUH21 — CrAl1205 Structural Use SUS405 405 X10CrAl13 SUH409 409 X6CrTi12 SMn420 1522 — SUS429 429 — SUH446 446 — SMn433 1534 — SUS430 430 X6Cr17 SMn438 1541 — SUS430F 430F X7CrMo18 l Martensitic Heat Resisting Steels SMn443 1541 — SUS434 434 X6CrMo17 1 SUH1 — X45CrSi9 3 SMnC420 — — SUH3 — — SMnC443 — — l Martensitic Stainless Steels SUH4 — — SUS403 403 — SUH11 — — l Cr-Mo Steels SUS410 410 X10Cr13 SUH600 — — SK1 — — SUS416 416 — SK2 W1-11 1/2 — SUS420JI 420 X20Cr13 SK3 W1-10 C105W1 SUS420F 420F — SK4 W1-9 — SUS431 431 X20CrNi17 2 SK5 W1-8 C80W1 SUS440A 440A — SK6 — C80W1 SUS440B 440B — SK7 — C70W2 SUS440C 440C — N21 Guidance Technical