The four-digit identification number used to designate carbon steel coils. AISI stands for the American Iron and Steel Institute. The first two digits in the AISI number indicate the grade of steel, while the last two digits give the amount of carbon in the steel.
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Still Building America—Welding big birds, pursuing big dreams - by Josh Welton Welder and inspector Lucca Ilbert, who trained at the Robert Morgan Educational Center in Miami, loves fabricating and repairing aircraft parts. He hopes one day to have his own FAA-approved custom fabricating shop.
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