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Welding - Welding of reinforcing steel - Part 1: Load-bearing welded joints ISO 17660-2: Welding - Welding of reinforcing steel - Part 1: Non-load bearing welded joints ISO/TR 20172: Welding — Grouping systems for materials — European materials ISO/TR 20173: Welding — Grouping systems for materials — American materials ISO/TR 20174
6011 and 7018 are among the most commonly used electrodues. Pipe welds are typically done with a 6010 root pass and 7018 cap. Boiler tube welds are now commonly tig'ed for the root past and finished with the appropriate stick electrode (7018, 8018, or 9018). An picture of an electrode chart from Lincoln, or Miller/Hobart would not be a bad idea.
Gas Metal Arc Welding [3] 131 135: GMAW Continuous consumable electrode and shielding gas: Industry Gas Tungsten Arc Welding [4] 141: GTAW Nonconsumable electrode, slow, high quality welds Aerospace, Construction (piping), Tool and Die Plasma Arc Welding: 15: PAW Nonconsumable electrode, constricted arc Tubing, instrumentation Shielded Metal ...
The actual welding technique utilized depends on the electrode, the composition of the workpiece, and the position of the joint being welded. The choice of electrode and welding position also determine the welding speed. Flat welds require the least operator skill, and can be done with electrodes that melt quickly but solidify slowly.
Gas tungsten arc welding (GTAW), or tungsten/inert-gas (TIG) welding, is a manual welding process that uses a non-consumable electrode made of tungsten, an inert or semi-inert gas mixture, and a separate filler material. Especially useful for welding thin materials, this method is characterized by a stable arc and high quality welds, but it ...
Operator skill is a major factor as improper electrode manipulation or machine setup can cause porosity. Flux-cored arc welding machine. Another type of FCAW uses a shielding gas that must be supplied by an external source. This is known informally as "dual shield" welding. This type of FCAW was developed primarily for welding structural steels.
For DC welding, the electrode can be connected to the machine's positive terminal (DCEP) or negative terminal (DCEN), changing the current's direction. The process and type of electrode used will typically determine the current. [44] [45] Shielding gas prevents oxygen in the atmosphere from entering the molten weld pool.
Spray transfer GMAW. Gas metal arc welding (GMAW), sometimes referred to by its subtypes metal inert gas (MIG) and metal active gas (MAG) is a welding process in which an electric arc forms between a consumable MIG wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to fuse (melt and join).
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