D2

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Chemical Composition

The following table shows the chemical composition of D2 tool steels.

Element Content (%)
C 1.40 – 1.60
Mn 0.60
Si 0.60
Co 1.00
Cr 11.00 – 13.00
Mo 0.70 – 1.20
V 1.10
P 0.03
Ni 0.30
Cu 0.25
S 0.03

Physical Properties

The physical properties of D2 tool steels are outlined in the following table.

Properties Metric Imperial
Density 7.7 x 1000 kg/m3 0.278 lb/in3
Melting point 1421°C 2590°F

Mechanical Properties

The mechanical properties of D2 steels are tabulated below:

Mechanical Properties Metric Imperial
Hardness, Knoop (converted from Rockwell C hardness) 769 769
Hardness, Rockwell C 62 62
Hardness, Vickers 748 748
Izod impact unnotched 77.0 J 56.8 ft-lb
Poisson's ratio 0.27-0.30 0.27-0.30
Elastic modulus 190-210 GPa 27557-30



D2