By preheat flame raise the surface or edge etc. of the steel to approximately 1800°F (it will looks bright red color). then direct pure oxygen toward the heated area in a fine, high pressure stream. As the steel is oxidized and blown away to form a cavity, the preheat and oxygen stream are moved at constant speed to form a continuous cut
Tahir Bilge Ölmez
International Welding Engineer
Mat. & Met. Eng.
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