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Tool steel D2

(submitted by the website administration)

USA: AISI D2, UK: BD2, Sweden: 2310, Germany: 1.2201, Japan: SKD11
Chemical composition: C=1.55%, Mn=0.3%, Si=0.3%, Cr=12%, Mo=1%
Property Value in metric unit Value in US unit
Density 7.7 *10³ kg/m³ 480.7 lb/ft³
Modulus of elasticity 210 GPa 30400 ksi
Thermal expansion (20 ºC) 10.5*10-6 ºCˉ¹ 5.8*10-6 in/(in* ºF)
Specific heat capacity 461 J/(kg*K) 0.11 BTU/(lb*ºF)
Thermal conductivity 20 W/(m*K) 139 BTU*in/(hr*ft²*ºF)
Annealing temperature 800...850 ºC 1800...1850 ºF
Quenching temperature 980-1100 ºC 1740...1800 ºF
Tempering temperature 175...480 ºC 350...900 ºF
Hardness (annealed) 97 RB 97 RB
Hardness (hardened) 64 RC 64 RC
Quenching medium Oil, air
Hardening depth High
Resistivity to distortion Very high
Resistivity to cracking High
Machinability Low
Toughness Low
Wear resistance Very high

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