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The AWS defines welding PQR as a record of welding variables used to produce an acceptable test weldment and the results of tests conducted on the weldment to qualify a Welding Procedure Specification. For steel construction (civil engineering structures) AWS D1.1 is a widely used standard.
Certification of companies for fusion welding of steel W47.2-11 (R2015) Certification of companies for fusion welding of aluminum W48-14: Filler metals and allied materials for metal arc welding W55.3-08 (R2013) Certification of companies for resistance welding of steel and aluminum W59-13: Welded steel construction (metal arc welding)
ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes; ASTM B308/308M: Standard Specification for Aluminum-Alloy 6061-T6 Standard Structural Profiles; ASTM B483: Standard Specification for Aluminum and Aluminum-Alloy Drawn Tube and Pipe for General Purpose Applications
The location of the elements of a welding symbol when following US conventions. In the US, the component elements of the weld specification are: [2] The reference line - the body of the arrow which is the baseline for the specification. The arrow tip which goes at an angle to the reference line, pointing to the joint to be welded.
Bare Metal Arc Welding (113) BMAW Consumable electrode, no flux or shielding gas Historical Carbon Arc Welding (181) CAW Carbon electrode, historical Copper, repair (limited) Flux Cored Arc Welding: 136 138: FCAW FCAW-S Continuous consumable electrode filled with flux Industry, construction Gas Metal Arc Welding [3] 131 135: GMAW
Aluminium alloys are often used due to their high strength-to-weight ratio, corrosion resistance, low cost, high thermal and electrical conductivity.There are a variety of techniques to join aluminium including mechanical fasteners, welding, adhesive bonding, brazing, soldering and friction stir welding (FSW), etc. Various techniques are used based on the cost and strength required for the joint.