Tensile modulus GPa of various materials

The specific mechanical properties take account of the density and consider the performance to density ratio (performance/density). 

Metals are characterized by their low coefficients of thermal expansion and their strong thermal and electric conductivities, whereas wood (except where there is excessive moisture), and neat polymers have high coefficients of thermal expansion and are electrical and thermal insulators. 

The loading or reinforcement of the polymers changes these characteristics  

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Figure 1.6. Specific tensile modulus (GPa) of various materials...

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