Many friends asked for the steel code lately,then I collect some as below.

American standard AISI Steel Code:

P1 – P19: LowCarbon Steel

P20-p39: Low Carbon, High Alloy Steel(plastic die Steel)

2 xx, xx, xx 4, 6 xx: Stainless Steel (Stainless Steel)

H1-h19: Chromium base (Chromium base – hot working steel)

Wx: Water Hardening Steel

Sx: Shock Resisting Steel

Ox: OilHardening Steel (Steel)

Ax: AirHardening Steel

Dx: High Carbon, High Chromium Steel

Mx: Molybdenum base (H.S.S.- high speed steel)

German standard DIN Steel Code:

Low carbon, high alloy (p20-plastic die steel)

Lowcarbon, high alloy (p20-plastic die steel)

Lowcarbon, high alloy, free Machine (p20-free cutting)

StainlessSteel (420 – acid-fast steel)

1.2316: Highperformance stainless Steel (420 – high acid Steel)

1.2343: Chromiumbase (Chromiumbase -H11 – hot working steel)

1.2344: Chromiumbase (chromium-based -H13 – hot working steel)

Lowalloy steel (o1-oil steel)

1.2379: Highcarbon, high chromium steel (D2 — chromium steel)

Japanese standard JIS Steel Code:

SxxC: Plain Carbon steel(yellow card-s55c)

SUSxx: Stainless Steel, acid Steel – 420)

SCrx: Chromium Steel

SCMx: Chromium Molybdenum Steel (P20)

SKx: Carbon Tool Steel

SKSx: Low Alloy Steel (oil steel-o1)

SKD11: MediumHigh Alloy Steel(chromium-d2)

SKD6: Medium High Alloy Steel(Medium High Alloy Steel -H11)

SKD61: Medium High Alloy Steel(Medium High Alloy Steel –H13)

SKHxx: High Speed Steel (hs-m 2)

SUMx: Free Cutting Steel

SUJx: Bearing Steel

Ms Sharon Wan

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Email: Sharon@otaisteel.com