Copyright Joseph Greene 200118 Properties of Materials Tensile modulusDensitySpec Mod –Low alloy steel207GPa(30Mpsi)7.85 g/cc26spGPa –Aluminum 72GPa(10Mpsi) 2.8 g/cc26spGPa –Carbon fiber300GPa(40Mpsi)1.8 g/cc167spGPa –Glass fiber76GPa(10Mpsi)2.56g/cc30spGPa –Aramid fiber125GPa (20Mpsi)1.4g/cc89spGPa (Kevlar) Tensile strengthDensitySpec Str –Low alloy steel1500MPa(220Kpsi)7.85 g/cc191spMPa –Aluminum 500MPa(75Kpsi) 2.8 g/cc178spGPa –Carbon fiber2400MPa(360Kpsi)1.8 g/cc4320spGPa –Glass fiber2000MPa(300Kpsi)2.56g/cc781spGPa –Aramid fiber3000MPa (450Kpsi)1.4g/cc2140spGPa (Kevlar)