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D2 tool steel


D2 steel (otherwise X155 CrVMo 12 or the same as 1.2379) is an air hardening, high-carbon, high-chromium tool steel. It has high wear and abrasion resistant properties. It is heat treatable and will offer a hardness in the range 55-62 HRC, and is machinable in the annealed condition. D2 steel shows little distortion on correct hardening. D2 steel’s high chromium content gives it mild corrosion resisting properties in the hardened condition.

Typical applications

Typical applications for D2 Steel:

  • Stamping or Forming Dies
  • Punches
  • Forming Rolls
  • Knives, slitters, shear blades
  • Tools
  • Scrap choppers
  • Tyre shredders


Typical chemical composition of AISI D2 Steel







We stock D2 sheet in a range of thickness 1.50 mm- 1.60 mm-2.0 mm-2.3mm-2.5mm-2.8mm-3.0mm-3.3mm-3.4mm-3.5mm-3.8mm-4.0mm-4.40mm-4.95mm-5.0mm-5.3mm-5.4mm-6.2mm-6.4mm-6.8mm-7.3mm-7.5mm-8.3mm-8.5mm-10 mm-10.50 mm in the hot rolled annealed condition.

Our range

We do not supply Mill Certificates with orders, we only supply Certificates of Conformity

Please contact us on 0114 244 0527 (option 2) to make an enquiry.