The derivation of materials properties data from small scale punch tests

The small scale punch test has been evaluated. Disc deformation behaviour has been investigated in a pressure vessel steel and its relationship with load displacement behaviour established. Empirical relationships between punch test data and uniaxial tensile data have been explored and reasonable correlations found. A punch test ductile brittle transition curve has been generated and a transition shift of 170 degrees C obtained compared with Charpy and fracture toughness data. Comparisons with published data indicate that correlations are sensitive to specimen and test rig geometry and are generally material specific.