1. 142, in 0.05 and in p = 0.0001, are confirming that during the forming of pipes, the level of deformation throughout the bending of sheet and calibration, influence the decrease of impact toughness. With increasing of the deformation level results that impact toughness decreased, and these decreasing is more significant for the pipe with diameter;three applied methods (criteria) for results analysis, with degree of decreasing the mistake of the first type
2. n-d-M Correlations Source: ASTM Standard D-3238-80. Copyright ASTM. Used with permission.