admin May 20, 2016 Material Properties for Gray Cast Iron Physical specifications of materials. Materials Gray Cast Iron Description Density g/cc 7.15 lb/in^3 0.258 Hardness Brinell unless specified 208 Tensile Strength ultimate Mpa 276 Ksi 40.02 Yield Strength MPa Ksi Modulus of Elasticity Gpa 10^6 Psi Poisson’s Ratio %Elongation at break %Reduction of area 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