Properties Metric Imperial Tensile strength 130 MPa 18855 psi Yield strength 125 MPa 18130 psi Shear strength 83 MPa 12039 psi Fatigue strength 55 MPa 7977 psi Elastic modulus 70-80 GPa 10153-11603 ksi Poisson's ratio 0.33 0.33 Elongation 10% 10% Hardness 35 35