Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a non-consumable tungsten electrode to produce the weld. The weld area and electrode are protected from oxidation or other atmospheric contamination by an inert shielding gas (argon or helium). A filler metal is normally used, though some welds, known as autogenous welds, or fusion welds do not require it. When helium is used, this is known as heliarc welding. A constant-current welding power supply produces electrical energy, which is conducted across the arc through a column of highly ionized gas and metal vapors known as a plasma. GTAW is most commonly used to weld thin sections of stainless steel and non-ferrous metals such as aluminum, magnesium, and copper alloys. The process grants the operator greater control over the weld than competing processes such as shielded metal arc welding and gas metal arc welding, allowing for stronger, higher quality welds. However, GTAW is comparatively more complex and difficult to master, and furthermore, it is significantly slower than most other welding techniques. 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.
Worksop (/ˈwɜːrksɒp/ WURK-sop) is the largest town in the Bassetlaw district of the ceremonial county of Nottinghamshire in the East Midlands of England. Worksop lies on the River Ryton, and is located at the northern edge of Sherwood Forest. Worksop is located 19 miles (31 km) east-south-east of Sheffield, with a population of 41,820. It lies close to Nottinghamshire’s borders with South Yorkshire, and Derbyshire.
Worksop, a market town, has become a commuter town as a result of its geographic location and ease of access to major motorways and rail links.
Worksop is known as the "Gateway to The Dukeries", because of the now four obsolete ducal principal sites of which were closely located next to each other, south of the town. These four ducal locations were; Clumber House, Thoresby Hall, Welbeck Abbey and Worksop Manor. Other houses such as Rufford Abbey and Hodsock Priory are also just a few miles away.
Worksop is twinned with the German town Garbsen.