本文件给出了铝、镁及其合金和纯铜的电子束和激光束焊接接头缺陷水平的指南。给出了三个等级，以允许应用于各种焊接制造。这些水平指的是生产质量，而不是所生产产品的适用性。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document gives guidance on levels of imperfections in electron and laser beam welded joints in aluminium, magnesium and their alloys and pure copper. Three levels are given in such a way as to permit application for a wide range of welded fabrications. The levels refer to production quality and not to the fitness-for-purpose of the product manufactured.All current amendments available at time of purchase are included with the purchase of this document.