This article contains the values ​​of various elastic constants for various materials.

Longitudinal modulus of elasticity

The longitudinal modulus of elasticity or Young's modulus relates the stress in one direction to the unit strains that occur in the same direction.

Transverse modulus of elasticity

The transverse modulus of elasticity, shear modulus or shear modulus, for most materials, specifically isotropic materials, has a fixed relationship with the longitudinal modulus of elasticity and Poisson's ratio:

Poisson's ratio

Poisson's ratio corresponds to the ratio between transverse deformation and longitudinal elongation in a tensile test. Alternatively, Poisson's ratio can be calculated from the longitudinal and transverse moduli of elasticity:

Yield strength and breaking stress

The breaking stress is not strictly an elastic constant, since, for example, for ductile materials such as metals, breaking occurs in the plastic regime. The following values ​​correspond to the tensile breaking limits:

Some additional data for other alloys are:.

Strain hardening

Most metals that exhibit plasticity do not exhibit plasticity with hardening. In many of them this hardening can be represented by the Ludwik equation:

where:.

This equation is only valid for the range between the elastic limit and the beginning of necking. In these cases the exponent values ​​calculated for some materials are given by:.

Impact energy (Charpy test)

Impact energy is a measure that measures how much energy is necessary to apply to a specimen of a certain material to deform it until it breaks. Impact energy is not a purely plastic phenomenon since it involves elastic deformation, plastic deformation and fracture. The data obtained in the Izod test are given by:[12]​.