Material Properties AISI 5140 Steel Annealed admin May 20, 2016 Material Properties for AISI 5140 Steel Annealed Physical specifications of materials. Materials AISI 5140 Steel Description Annealed Density g/cc 7.85 lb/in^3 0.284 Hardness Brinell unless specified 167 Tensile Strength ultimate Mpa 570 Ksi 82.65 Yield Strength MPa 295 Ksi 42.775 Modulus of Elasticity Gpa 205 10^6 Psi 29.71014488 Poisson’s Ratio 0.29 %Elongation at break 28.6 %Reduction of area 59.2 Izod Impact J 41 Ft-lb 30.2498 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