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Tool steel A2

(submitted by the website administration)

USA: AISI A2, UK: BA2, Sweden: 2260, Germany: 1.2363, Japan: SKD12
Chemical composition: C=1%, Mn=0.3%, Si=0.3%, Cr=5%, Mo=1%
Property Value in metric unit Value in US unit
Density 7.81 *10³ kg/m³ 487.8 lb/ft³
Modulus of elasticity 190 GPa 27500 ksi
Thermal expansion (20 ºC) 10.6*10-6 ºCˉ¹ 5.9*10-6 in/(in* ºF)
Specific heat capacity 461 J/(kg*K) 0.11 BTU/(lb*ºF)
Thermal conductivity 26 W/(m*K) 180 BTU*in/(hr*ft²*ºF)
Annealing temperature 840...870 ºC 1545...1600 ºF
Quenching temperature 950...980 ºC 1740...1800 ºF
Tempering temperature 175...480 ºC 350...900 ºF
Hardness (annealed) 97 RB 97 RB
Hardness (hardened) 65 RC 65 RC
Quenching medium Air
Hardening depth High
Resistivity to distortion Very high
Resistivity to cracking Very high
Machinability Medium
Toughness Medium
Wear resistance High

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