Metals -> Tool steel -> Carbon tool steel Characteristics of the material U12А ( U12А, У12А ).
Material : U12А ( U12А, У12А ) Classification : Carbon tool steel
Chemical composition in % of the material U12А ( U12А, У12А ) . C Si Mn Ni S P Cr Cu 1.16 - 1.23 0.17 - 0.33 0.17 - 0.28 max 0.2 max 0.018 max 0.025 max 0.2 max 0.2
Temperature of critical points of the grade U12А ( U12А, У12А ).
Ac1 = 730 , Ac3 (Acm ) = 820 , Ar1 = 700 , Mn = 200
Mechanical properties under Т=20o С of the material U12А ( U12А, У12А ) .
Assortment Dimension Direct. s в s T
d 5
y KCU Heat treatment - mm - MPa MPa % % kJ / m2 - Band annealed 0.08 - 3 750 10
Brinell hardness of the material U12А ( U12А, У12А ) (annealing) , HB 10 -1 = 207 MPa
Physical properties of the material U12А ( U12А, У12А ) . T E 10- 5 a 10 6 l r C R 10 9 Grade MPa 1/Grade Watt/(m·Grade) kg/m3 J/(kg·Grade) Ohm·m 20 7810
Specification :
Mechanical properties : s в - Tensile strength , [MPa] s T - Yield stress, [MPa] d 5 - Specific elongation at fracture , [ % ] y - Reduction of area , [ % ] KCU - Impact strength , [ kJ / m2 ] HB - Brinell hardness , [MPa]
Physical properties : T - Test temperature , [Grade] E - Young modulus , [MPa] a - Coefficient of linear expansion
(range 20o - T ) , [1/Grade] l - Termal (heat) condition coefficient , [Watt/(m·Grade)] r - Density , [kg/m3 ] C - Specific heat
( range 20o - T ), [J/(kg·Grade)] R - Electrical resistance , [Ohm·m]
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