what is the melting point of this substance?
UNANSWERABLE
what is gas tungsten arc welding? It is an arc welding process that uses a non-consumable tungsten electrode to produce the weld. is there a gas used in this welding process? Yes, shielding gas what specific gas is used? Helium why are such gases used in this process? To protect the welding area from atmospheric gases. what are some of the applications of this process? Its used in welding thin workpieces, manufacture of space vehicles, bicycle industry, etc. what is that electrode which is used in this process made up of? Tungsten
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Gas tungsten arc welding [SEP] Introduction
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 is protected from oxidation or other atmospheric contamination by an inert shielding gas (argon or helium), and 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.