Modulus of shear G  Shear strength, Tensile strength ...
Material G [GPa] The maximum shear stress of ductile materials (steels) is usually taken τ = 0.58 Rp0.2 according von Mises distortion energy criterion, i.e. yielding). For brittle materials τ = 0.5 Rp0.2.

PROPERTIES OF SPRING MATERIALS >>
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Steel
Copper
Titanium
Glass
Aluminium
Polyethylene
Rubber 		79.3
63.4
41.4
26.2
25.5
0.117
0.0003
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