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Alloy steel SAE 9255

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SAE 9255
Chemical composition: C=0.55%, Mn=0.9%, Si=2.0%
Property Value in metric unit Value in US unit
Density 7.872 *10³ kg/m³ 491.4 lb/ft³
Modulus of elasticity 205 GPa 29000 ksi
Thermal expansion (20 ºC) 11.5*10-6 ºCˉ¹ 6.39*10-6 in/(in* ºF)
Specific heat capacity 477 J/(kg*K) 0.114 BTU/(lb*ºF)
Thermal conductivity 51.9 W/(m*K) 360 BTU*in/(hr*ft²*ºF)
Electric resistivity 2.34*10-7 Ohm*m 2.34*10-5 Ohm*cm
Tensile strength (annealed) 536 MPa 112000 psi
Yield strength (annealed) 357 MPa 71100 psi
Elongation (annealed) 22 % 22 %
Hardness (annealed) 96 RB 96 RB
Tensile strength (normalized) 633 MPa 135000 psi
Yield strength (normalized) 385 MPa 84100 psi
Elongation (normalized) 20 % 20 %
Hardness (normalized) 28 (104) RC (RB) 28 (104) RC (RB)

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