d6 steel

D6 steel is a high-carbon, high chromium tool steel alloyed with tungsten that is characterized by high compressive strength, high wear resistance, high surface hardness and good hardening stability. It is also called SKD2 steel and DIN 1.2436 steel. And D6 steel chemical composition and heat treatment information are below.

Tool steels are primarily used to manufacture tools that can be used for machining metals, woods, and plastics. They are generally ingot-cast wrought products, and have the potential to be stable at elevated temperatures and withstand high specific loads.

D6 Steel Application

press mold

SKD2 steel chemical composition makes it become good tool steel in the industry. SKD2 steel is used for forming tools; molds for abrasive plastics and ceramics; long-run press tools; blanking and shearing tools for hard materials; stamping tools; scraping tools and etc.

SKD2 Steel Physical Properties

Density7.67 g/cm³0.277 lb/in³

SKD2 Steel Mechanical Properties

Compressive strength1320 MPa191000 psi
Modulus of elasticity194 GPa28100 ksi
Hardness, Rockwell C4646

D6 Steel Grade Equivalent Chart

StandardASTM A681-08EN ISO 4957JIS G4404

D6 Steel Chemical Composition and Equivalent Grades

ASTM A681-082.00-2.200.20-0.400.030.030.20-0.4011.50-12.500.60-0.90
EN ISO 49572.00-2.300.30-0.600.030.030.10-0.4011.00-13.000.60-0.80
JIS G44042.00-2.300.30-0.600.030.030.10-0.6011.00-13.000.60-0.80

D6 Steel Round Bar Sheet Plate Heat Treatment


SKD2 tool steel is heated slowly and uniformly to 700°C (1292°F) and then more rapidly to 900-1050°C (1652-1922°F).


SKD2 tool steel is then annealed at 800-840°C (1472-1544°F) and cooled. Hardness of the steel after annealing will be approximately 225 Brinell.

Stress Relieving

Stresses from SKD2 tool steel can be eliminated before hardening by heating up to 650-700°C (1202-1292°F), if machining operations have been heavy. The steel is then allowed to cool slowly.

d6 steel round bar


SKD2 steel is pre-heated slowly to 750-800°C (1382-1472°F) and thoroughly soaked. Heating is then continued till the final hardening of 950-980°C (1742-1796°F), followed by air or oil quenching.


The SKD2 steel is heated uniformly and thoroughly at the selected tempering temperature. Double tempering can also be carried out with intermediate cooling to room temperature.

SKD2 Steel Round Bar Sheet Plate Supply

Round Bar

Specification: Dia 20-600; Length: <5800(fit 20ft container); >5800mm, 40ft container
Surface: original black, peeled, machined/turned, polished/ grounded/milled/grinded


Specification: thickness: 10-600mm; width: 30-810mm; length: same as above
Surface: original black, machined/turned, polished/ grounded/milled/grinded


We have our own cutting and processing equipment. Specifications can be cut and customized according to your requirements.

We are a professional special steel stockist and supplier with a high-quality stand for many years. Please contact us for any request of D6/SKD2 steels materials. Songshun Steel always with you.