Bulk Modulus - Metals and Alloys

Bulk modulus of some common metals and alloys

The Bulk Modulus of a substance measures the substance's resistance to uniform compression. Bulk Modulus of Elasticity is the ratio of stress to change in volume of a material subjected to axial loading.

Material Bulk Modulus
(106 psi) (GPa)
Aluminum, various alloys 9.9 - 10.2 68 - 70
Brass, 70-30 15.7 108
Brass, cast 16.8 116
Copper 17.9 123
Iron, cast 8.4 - 15.5 58 - 107
Iron, malleable 17.2 119
Magnesium alloy 4.8 33.1
Monel metal 22.5 155
Phosphor bronze 16.3 112
Stainless Steels 18-8 23.6 163
Steel, cast 20.2 139
Steel, cold rolled 23.1 159
Steel, various 22.6 - 24.0 156 - 165

Bulk Modulus is related to Modulus of Elasticity and Poisson's Ratio as

K = E / 3 (1 - 2 r)         (1)

where

K = Bulk Modulus

E = Modulus of Elasticity

r = Poisson's Ratio

Related Topics

  • Material Properties - Material properties - density, heat capacity, viscosity and more - for gases, fluids and solids

Related Documents

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