■ Steel and Non-Ferrous Metal Symbols Chart

●Carbon Steels●High SeedSteels●Austenitic Stainless Steels
JISAISIDINJISAISIDINJISAISIDIN
S10C1010C10SKH2T1—SUS201201—
S15C1015C15SKH3T4S18-1-2-5SUS202202—
S20C1020C22SKH10T15S12-1-4-5SUS301301X12CrNi17 7
S25C1025C25SKH51M2S6-5-2SUS302302—
S30C1030C30SKH52M3–1—SUS302B302B—
S35C1035C35SKH53M3–2S6-5-3SUS303303X10CrNiS18 9
S40C1040C40SKH54M4—SUS303Se303Se—
S45C1045C45SKH56M36—SUS304304X5CrNiS18 10
S50C1049C50SUS304L304LX2CrNi19 11
S55C1055C55●AlloyToolSteelsSUS304NI304N—
SKS11F2—SUS305305X5CrNi18 12
●Ni-Cr-Mo SteelsSKS51L6—SUS308308—
SNCM220862021NiCrMo2SKS43W2-91/2—SUS309S309S—
SNCM2408640—SKS44W2-8—SUS310S310S—
SNCM415——SKD1D3X210Cr12SUS316316X5CrMo17 12 2
SNCM4204320—SKD11D2—SUS316L316LX2CrNiMo17 13 2
SNCM4394340—●GreyCastIronSUS316N316N—
SNCM447——FC100No 20BGG-10SUS317317—
●Cr SteelsFC150No 25BGG-15SUS317L317LX2CrNiMo18 16 4
SCr415——FC200No 30BGG-20SUS321321X6CrNiTi18 10
SCr4205120—FC250No 35BGG-25SUS347 SUS384347 384X6CrNiNb18 10 —
●GreyCastIron
FC100No 20BGG-10
FC150No 25BGG-15
FC200No 30BGG-20
FC250No 35BGG-25
FC300No 45BGG-30
FC350No 50BGG-35
●Nodular Cast Iron
FCD40060-40-18GGG-40
FCD450—GGG-40.3
FCD50080-55-06GGG-50
FCD600—GGG-60
FCD700100-70-03GGG-70
●Cr Steels
SCr415 ——
SCr420 5120—
SCr430 513034Cr4
SCr435 513237Cr4
SCr440 514041Cr4
SCr445 5147—
●Cr-Mo Steels
SCM415 ——
SCM420 ——
SCM430 4131—
SCM435 413734CrMo4
SCM440 414042CrMo4
SCM445 4145—
●Heat ResistingSteels
SUH31——
SUH35——
SUH36—X53CrMnNi21 9
SUH37——
SUH38——
SUH309309—
SUH310310CrNi2520
SUH330N08330—
●Ferritic Heat ResistingSteels
SUH21— CrAl1205
SUH409409 X6CrTi12
SUH446446 —
●Martensitic Heat ResistingSteels
SUH1— X45CrSi9 3
SUH3— —
SUH4— —
SUH11— —
SUH600— —
●Mn Steels Structurerand Mn-Cr Steels for Use
SMn4201522 —
SMn4331534 —
SMn4381541 —
SMn4431541 —
SMnC420— —
SMnC443— —
SUS405405X10CrAl13
SUS429429—
SUS430430X6Cr17
SUS430F430FX7CrMo18
SUS434434X6CrMo17 1
●MartensiticStainlessSteels
SUS403403—
SUS410410X10Cr13
SUS416416—
SUS420JI420X20Cr13
SUS420F420F—
SUS431431X20CrNi17 2
SUS440A440A—
SUS440B440B—
SUS440C440C—
●CarbonTool Steels
SK1——
SK2W1-111/2—
SK3W1-10C105W1
SK4W1-9—
SK5W1-8C80W1
SK6—C80W1
SK7—C70W2