D-2 Air Hardening Tool Steel

AISI D2 is a high-carbon and high-chromium air hardening cold work tool steel. D2 steel provides an effective combination of high hardness, high toughness and good thermoplasticity, used for making large and thermoplastic cutting tools in addition to general tools.

D2 tool steel Designations:


DIN 1.2379


SAE J437

SAE J438

Available forms:

D2 round/square bar

D2 plate

D2 Flats

Chemistry composition:

1.40-1.6011.0 -13.00.10-0.600.70- 1.200.50-1.100.10-0.60Balance

Physical and Mechanical Properties:

Density:7.72 to 8.0 g/cm3

Thermal expansion at 20-200°C : 10.6  10⁶m/(m*K)

Hardness, Rockwell C: 57-59 HRC

Thermal Conductivity at 20-700°C: 16.7-24.2 W/(m*K)


AISI D2 tool steel is ideal for threading rolls and dies, icy trimming, cutting and stamping tools such as blanking Dies, Burnishing Tools, Coining Dies, Drawing Dies, Swaging Dies, Threaded Rolling Dies, Trimming Dies


ASTM D2 is the superior to D3 due to high alloys properties. The 12 % Chromium and 0.90% addition of Vanadium making it a high wear resistance and toughness.

LKALLOY is a leading Supplier of AISI D2 Steel. We mainly stocks and produces AISI D2 bar, AISI D2 flats, AISI D2 plates and other forms in various size and specifications.

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