AWS C7.3:2016 pdf free download

AWS C7.3:2016 pdf free download.Process Specification for Electron Beam Welding.
5.1.2.1 To avoid problems with beam deflection, all tixturing should be non-magnetic where practical. At intervals to be noted in the WPS, the levels of residual magnetism of the tooling shall be monitored. If magnetism exceeds the allowable level noted in the WPS. degaussing operations must be accomplished to restore an acceptable level.
5.1.2.2 All tixturing should be made 1mm materials that will not affect weld or base metal quality through contact (either directly or via spatter). All tooling shall be cleaned w ensure no contamination is introduced into the weldment.
5.1.2.3 All tooling and tixturing shall meet calibration procedures noted in Clause 8.
5.2 Materials. This clause addresses the materials used during electron beam welding.
5.2.1 Base materials shall be specified in the reference document, these include contract, specification, drawing. etc.
5.2.2 Filler materials, when required. shall be specified in the reference document or in the WPS.
5.2.3 Cleaning materials, chemical solvents, and etching solutions shall be specified in the reference document or in the WPS. Some suggested cleaning materials and methods are noted in Annex A.
53 Joint Design. This clause addresses typical joints and tolerancing.
5.3.1 All joints shall be specified in the reference document using the symbols and terminology of AWS A2.4 and
AVS A3.O.
5.3.2 The tolerances for squareness and parallelism of the faying surfaces shall be specified in the reference document. Proper tolerances for these parameters are essential for the production of acceptable welds. See Clause 8 of AWS C?. I for more information on acceptable tolerance levels for electron beam welding.
5.3.3 The tolerances for root opening and mismatch shall be specified in the reference document. Proper tolerances for these parameters are essential for the production of acceptable welds. See Clause 8 of AWS C7. I for more information on acccptabk tolerance levels for electron beam welding.
5.4 Preweld and Postweld Heat Treatments. Preweld and postweld heat treatments are material dendent. Postweld heat treatments are usually a separate operation. However, if either is used, essential parameters shall be specified in the reference document or WPS.
5.5 Procedures. All weidments shall be fabricated in accordance with the reference document by following the WPS qualified and accepted for each type of weld employed. Required records and documents include the WPS. (he weld procedure qualification record (WPQR). AWS C7.3:2016 pdf free download.