D2 Special Steel Properties
D2 special steel belongs to cold working tool steel with high carbon and high chromium contents.
Properties: This tool steel is a deep hardening, highly wear resistant alloy. It hardens upon air cooling so as to have minimum distortion after heat treatment. Machinability of D2 is poor. Using the water hardening simple alloy tool steels (W group) as a base of 100% the D2 alloy would rate about 50% in machinability.
Available Sizes:
Round bars:φ14-85
forged round bars: φ90~260
flats: thickness: 100~250mm; width: 500~800mm
Forming is done by forging and machining. Consult the alloy supplier for information as to welding. Heat treatment: Preheat very slowly to 1500 F and then increase temperature to 1850 F. Hold at 1850 F for 20 to 45 minutes and air cool (air quench). Forging may be done in the range of 1950 F down to 1750 F. Do not forge below 1700 F.
Cold working by conventional methods may be done with the alloy in the annealed condition.
Main applications: Used for long run tooling applications where wear resistance is important, such as blanking or forming dies and thread rolling dies.