Material Properties AISI 4027 Steel Annealed admin May 20, 2016 Material Properties for AISI 4027 Steel Annealed Physical specifications of materials. Materials AISI 4027 Steel Description Annealed Density g/cc 7.85 lb/in^3 0.284 Hardness Brinell unless specified 143 Tensile Strength ultimate Mpa 515 Ksi 74.675 Yield Strength MPa 325 Ksi 47.125 Modulus of Elasticity Gpa 205 10^6 Psi 29.71014488 Poisson’s Ratio 0.29 %Elongation at break 30 %Reduction of area 52.9 Izod Impact J Ft-lb Fracture Toughness Mpa(m)^0.5 Ksi(in)^0.5 Thermal conductivity W/m-K Btu/ft-h-F Specific Heat Cpacity J/g-K Btu/lb-F Coefficient of thermal expansion 1E-6/K 1E-6/F Electrical Resistivity Ohm-cm 0.0000245