free machining steels
free machining steels
Group of carbon steels designated by the American Iron and Steel Institute numerical classification are free machining grades: AISI 1108, 1109, 1110, etc., up to AISI 1151 for a total of 14 grades. AISI 1211, 1212, 1213, 1215 and 12L14 carbon steels are also free machining grades. Free machining steels contain one or more additives, which enhance machining characteristics and lower machining cost. Increased sulfur content (from 0.20 to 0.33 percent in some grades) improves chip control. Addition of lead (from 0.15 to 0.35 percent in some grades) reduces friction and buildup of heat between the cutting edge of the tool and the workpiece.
Group of carbon steels designated by the American Iron and Steel Institute numerical classification are free machining grades: AISI 1108, 1109, 1110, etc., up to AISI 1151 for a total of 14 grades. AISI 1211, 1212, 1213, 1215 and 12L14 carbon steels are also free machining grades. Free machining steels contain one or more additives, which enhance machining characteristics and lower machining cost. Increased sulfur content (from 0.20 to 0.33 percent in some grades) improves chip control. Addition of lead (from 0.15 to 0.35 percent in some grades) reduces friction and buildup of heat between the cutting edge of the tool and the workpiece.