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EXAMINATION OF RAW MATERIALS
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alloys amperage arc strike ASTM base metal blisters borescope brazing caused characteristics color cooling Courtesy cracking cross section decarburization diameter dimensional dimensions distortion ductile ductile failure electrical resistance electrode equipment excessive failure analysis fatigue fiber film Flash welding flux focal length foreign material forging fracture surfaces fusing gages groove hand-held heat treated heat treatment heat-affected zone hot deformation hydrogen embrittlement improper inch ingot inspection intergranular involves joint lens lenses loading magnifying devices magnifying power manufacturer markings Measuring Devices merchant bars methods mill mold mold sand molten metal observed occur oxides photography pipe plate porosity problems produce record keeping rejection removed resistance welding result reveal rolled rolled-in SAE-Grade scale seams shape shear sketches slag solder solidification specific spot welding stress concentration supplier surface defects tape temperature tion transgranular tubing U.S. Steel upset weld usually view camera visual examination weld metal wire