Material Properties Malleable Cast Iron Astm Class 47 admin May 20, 2016 Material Properties for Malleable Cast Iron Astm Class 47 Physical specifications of materials. Materials Malleable Cast Iron Description Astm Class 47 Density g/cc 7.15 lb/in^3 0.258 Hardness Brinell unless specified 156 Tensile Strength ultimate Mpa 345 Ksi 50.025 Yield Strength MPa 224 Ksi 32.48 Modulus of Elasticity Gpa 10^6 Psi Poisson’s Ratio 0.29 %Elongation at break 10 %Reduction of area Izod Impact J Ft-lb Fracture Toughness Mpa(m)^0.5 Ksi(in)^0.5 Thermal conductivity W/m-K 40 Btu/ft-h-F 23.12138728 Specific Heat Cpacity J/g-K Btu/lb-F Coefficient of thermal expansion 1E-6/K 12 1E-6/F 6.676691724 Electrical Resistivity Ohm-cm 0.000034