Marco Steel inventories alloy in 4140, 4145, 4130, 4340, 8620, aluminum in rounds, flats, squares, angles, channels, sheet, plate, and tubing, and stainless steel in 304, 304/L, 316/L, rounds, flats, squares, angles, sheet, plate, and tubing. Our processing capabilities include plasma cutting, spade drilling, shearing, sawing and trepanning upon request.