Material Properties AISI 5140 Steel Oil Quenched admin May 20, 2016 Material Properties for AISI 5140 Steel Oil Quenched Physical specifications of materials. Materials AISI 5140 Steel Description Oil Quenched Density g/cc 7.85 lb/in^3 0.284 Hardness Brinell unless specified 293 Tensile Strength ultimate Mpa 972 Ksi 140.94 Yield Strength MPa 841 Ksi 121.945 Modulus of Elasticity Gpa 205 10^6 Psi 29.71014488 Poisson’s Ratio 0.29 %Elongation at break 18.5 %Reduction of area 58 Izod Impact J Ft-lb Fracture Toughness Mpa(m)^0.5 Ksi(in)^0.5 Thermal conductivity W/m-K 44.6 Btu/ft-h-F 25.7803468172 Specific Heat Cpacity J/g-K 0.452 Btu/lb-F 0.10848 Coefficient of thermal expansion 1E-6/K 12.6 1E-6/F 7.0105263102 Electrical Resistivity Ohm-cm 0.0000228