Material Properties AISI 1040 Steel Annealed admin May 20, 2016 Material Properties for AISI 1040 Steel Annealed Physical specifications of materials. Materials AISI 1040 Steel Description Annealed Density g/cc 7.845 lb/in^3 0.283 Hardness Brinell unless specified 149 Tensile Strength ultimate Mpa 515 Ksi 74.675 Yield Strength MPa 350 Ksi 50.75 Modulus of Elasticity Gpa 200 10^6 Psi 28.9855072 Poisson’s Ratio 0.29 %Elongation at break 30 %Reduction of area 57 Izod Impact J 45 Ft-lb 33.201 Fracture Toughness Mpa(m)^0.5 Ksi(in)^0.5 Thermal conductivity W/m-K 51.9 Btu/ft-h-F 29.9999999958 Specific Heat Cpacity J/g-K 0.486 Btu/lb-F 0.11664 Coefficient of thermal expansion 1E-6/K 11.3 1E-6/F 6.2872180401 Electrical Resistivity Ohm-cm 0.0000171