the highest temperature where a metal remains completely solid.
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Tempering
process of reheating hardened steel below the lowest critical temperature and then allowing it to cool to make the steel stronger.
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Weld
a point where metals have been fused together by heating the materials to a suitable temperature. Filler metals or pressure may be used to accomplish the weld.
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Welder Certification
document certifying that the welder has made his welds according to the standards prescribed.
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Welding torch
tool used for gas welding to control the flow of gases used.