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In order to measure the material properties in the conditions of metal cutting, wire drawing and missile penetration, a biaxial shear experiment has been performed at very large strains (~ 4) and at very high strain rate (0.4x105s-1) using a special specimen having a thin (0.25 mm) ring-shaped gauge part. The loading device is a tension-torsion Hopkinson bar apparatus which can be used also at low and medium strain rate. A special electroptical technique has been developed for the direct measurement on the specimen of the axial and angular displacements and of the shear stresses. Equivalent stress strain curves from shear tests of AISI 316 have been compared with tension curves.