AWS A5。8M/A5。8:2019规定了钎焊和钎焊用钎料的分类要求。规定了120多种钎焊填充金属的化学成分、物理形态和包装。所述钎焊填充金属组包括铝、钴、铜、金、镁、镍、钯、银、钛和真空设备用钎焊填充金属。提供了有关每种钎焊填充金属的液相线、固相线、钎焊温度范围和推荐的一般应用区域的信息。额外要求包括制造、尺寸、长度和包装。本规范附有一份指南，作为所用分类系统以及钎焊和钎焊用钎料的预期用途的信息来源。

AWS A5.8M/A5.8:2019 prescribes the requirements for the classification of brazing filler metals for brazing and braze welding. The chemical composition, physical form, and packaging of more than 120 brazing filler metals are specified. The braz-ing filler metal groups described include aluminum, cobalt, copper, gold, magnesium, nickel,palladium, silver, titanium, and brazing filler metals for vacuum service. Information is provided concerning the liquidus, the solidus, the brazing temperature range, and general areas of application recommended for each brazing filler metal. Additional requirements are included for manufacture, sizes, lengths, and packaging. A guide is appended to the specification as a source of infor-mation concerning the classification system employed and the intended use of the brazing filler metals for brazing and braze welding.