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Weld purging is the act of removing, from the vicinity of the joint; oxygen, water vapour and any other gases or vapours that might oxidize or contaminate a welding joint as it is being welded and immediately after welding. [1] Stainless steels, duplex steels, titanium-, nickel- and zirconium- alloys are sensitive to the presence of air, oxygen ...
TIG welding is most commonly used to weld thin sections of stainless steel and non-ferrous metals such as aluminium, magnesium, and copper alloys. A related process, plasma arc welding, uses a slightly different welding torch to create a more focused welding arc and as a result is often automated. [1]
Structural steel welding - Welding of steel structures subject to high levels of fatigue loading AS/NZS 1554.6: Structural steel welding - Welding stainless steels for structural purposes AS/NZS 1554.7: Structural steel welding - Welding of sheet steel structures AS/NZS 3992: Pressure equipment - Welding and brazing qualification AS/NZS 4855
This is a list of welding processes, separated into their respective categories. The associated N reference numbers (second column) are specified in ISO 4063 (in the European Union published as EN ISO 4063 ). [ 1 ]
Successful orbital welding is also dependent upon using high quality tubing material. Typically only 316L stainless steel tubing (not pipe) and fittings are used for automatic orbital GTA welding and are obtained from a number of specialty manufacturers. The weld quality depends upon having a reasonably clean source of Argon for backing and ...
Plasma arc welding is an advanced form of tungsten inert gas (TIG) welding. In the case of TIG, it is an open arc shielded by argon or helium, whereas plasma uses a special torch where the nozzle is used to constrict the arc while the shielding gas is separately supplied by the torch. The arc is constricted with the help of a water-cooled small ...
Argon-oxygen blends with 1–2% oxygen are used for austenitic stainless steel where argon-CO 2 can not be used due to required low content of carbon in the weld; the weld has a tough oxide coating and may require cleaning. Hydrogen is used for welding of nickel and some stainless steels, especially thicker pieces. It improves the molten metal ...
High-strength low-alloy steels (HSLA) were developed especially for welding applications during the 1970s, and these generally easy to weld materials have good strength, making them ideal for many welding applications. [5] Stainless steels, because of their high chromium content, tend to behave differently with respect to weldability than other ...