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Die steel P20

(submitted by the website administration)

USA: AISI P20
Chemical composition: C=0.4%, Mn=1.5%, Si=0.4%, Cr=1.9%, Mo=0.2%
Property Value in metric unit Value in US unit
Density 7.81 *10³ kg/m³ 487.5 lb/ft³
Modulus of elasticity 205 GPa 29700 ksi
Thermal expansion (20 ºC) 12.8*10-6 ºCˉ¹ 7.1*10-6 in/(in* ºF)
Specific heat capacity 460 J/(kg*K) 0.11 BTU/(lb*ºF)
Thermal conductivity 29 W/(m*K) 201 BTU*in/(hr*ft²*ºF)
Annealing temperature 850...900 ºC 1560...1650 ºF
Quenching temperature 860...880 ºC 1580...1620 ºF
Tempering temperature 200...590 ºC 390...1100 ºF
Hardness (annealed) 95 RB 95 RB
Hardness (hardened) 52 RC 52 RC
Quenching medium Oil
Hardening depth Medium
Resistivity to distortion High
Resistivity to cracking High
Machinability High
Toughness High
Wear resistance Low

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