The four-point flexural test provides values for the modulus of elasticity in bending E f , flexural stress σ σ f , flexural strain ε ε f and the flexural stress-strain response of the material. This test is very similar to the three-point bending flexural test. The major difference being that with the addition of a fourth bearing the portion of the beam between the two loading points is put under maximum stress, as opposed to only the material right under the central bearing in the case of three-point bending.