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About This Item


Full Description

Eighteen fluxes for brazing and braze welding are classified according to the filler metal, form, and activity temperature range. Classification is in accordance with a classification system that employs the designator FB to indicate fluxes for brazing and braze welding applications. In addition to selected tests for each classification, major topics include general requirements, testing procedures, and packaging requirements. An annex listing general application guidelines is included.

This specification makes use of both the International System of Units (SI) and U.S. Customary Units. The measurements may not be exact equivalents; therefore, each system shall be used independently.

Document History

  1. AWS A5.31M/A5.31:2012


    Specification for Fluxes for Brazing and Braze Welding

    • Most Recent
  2. AWS A5.31:1992

    Specification for Fluxes for Brazing and Braze Welding

    • Historical Version