金属材料.管材.环形扩口试验

[中文适用范围]： 本国际标准规定了一种管材扩环试验方法，通过使用锥形心轴将试件扩径直至断裂，以显露管材表面和管壁内部的缺陷。 它还可用于评估管材承受塑性变形的能力。 扩环试验适用于外径18mm以上150mm以下、壁厚2mm以上16mm以下的管材。 [外文原描述]： ISO 8495:2013 specifies a method for a ring-expanding test on tubes, that is used to reveal defects both on the surfaces and within the tube wall by expanding the test piece using a conical mandrel until fracture occurs. It may be also used to assess the ability of tubes to undergo plastic deformation. The ring-expanding test is applicable to tubes having an outside diameter from 18 mm up to and including 150 mm and a wall thickness from 2 mm up to and including 16 mm.