Material Properties AISI 4027 Steel Water Quenched admin May 20, 2016 Material Properties for AISI 4027 Steel Water Quenched Physical specifications of materials. Materials AISI 4027 Steel Description Water Quenched Density g/cc 7.85 lb/in^3 0.284 Hardness Brinell unless specified 311 Tensile Strength ultimate Mpa 1035 Ksi 150.075 Yield Strength MPa 917 Ksi 132.965 Modulus of Elasticity Gpa 205 10^6 Psi 29.71014488 Poisson’s Ratio 0.29 %Elongation at break 16 %Reduction of area 57.8 Izod Impact J Ft-lb Fracture Toughness Mpa(m)^0.5 Ksi(in)^0.5 Thermal conductivity W/m-K 44.5 Btu/ft-h-F 25.722543349 Specific Heat Cpacity J/g-K 0.475 Btu/lb-F 0.114 Coefficient of thermal expansion 1E-6/K 1E-6/F Electrical Resistivity Ohm-cm 0.0000245