A wire specimen is winded 5 windings around a round test bar with a given tensile stress in a spiral style,then measure the restore angle of the end of the 5th winding.

• 1996回弹性是卷绕成螺旋线圈或弯曲成一个角度的试样回弹后所测试得到的角度，一根校直试样在圆棒上卷绕5圈，圆棒直径和卷绕时张力应符合有关产品标准的规定。回弹性测量是第五圈试样末端回弹的角度读数。