Young's Modulus for steel is mostly invariant to chemical composition, processing, etc. The value is around 207 GPa. Poisson's ratio is usually accepted to be 0.29. Mass density is ~ 7.85 g/cm3. Thermal expansion coefficient is ~ 12 x 10-6m/mK from 20-100 C. From 20-200 it is ~ 12.5, 20-300 it is ~ 13.0, and 20-400 it is ~ 13.6.