AWS C3。9/C3。9M:2020提供了钢、铜、铜合金、耐热和耐腐蚀合金电阻钎焊的最低制造、设备、材料和工艺程序要求，以及不连续性限制，以及其他可充分进行电阻钎焊的材料（AWS C3.7M/C3.7《铝钎焊规范》中介绍了铝合金的电阻钎焊）。本规范提供了根据荷载和失效后果对电阻钎焊接头进行分类的标准，以及定义每类可接受极限的质量保证标准。 本规范规定了可接受的电阻钎焊设备、材料和程序，以及每类接头所需的检查。

AWS C3.9/C3.9M:2020 provides the minimum fabrication, equipment, material, and process procedure requirements, as well as discontinuity limits for the resistance brazing of steels, copper, copper alloys, heat- and corrosion-resistant alloys, and other materials that can be adequately resistance brazed (the resistance brazing of aluminum alloys is addressed in AWS C3.7M/C3.7, Specification for Aluminum Brazing). This specification provides criteria for classifying resistance brazed joints based on loading and the consequences of failure and quality assurance criteria defining the limits of acceptability in each class. This specification defines acceptable resistance brazing equipment, materials, and procedures, as well as the required inspection for each class of joint.