5/32" to 1/2 inch thick. 14. For high speed cutting of angle iron, cast iron, bronze, brass, copper, galvanized pipe, thin wall tubing, mild steel, and also tougher steels at slow speed. 1/8" to 1/4 inch thick. 3/32" to 1/8 inch thick. 18. Recommended use of a ALLOY STEEL BLADE. Thickness of metal to be cut.