45 #, 40Cr, 42CrMo chrome alloy steel products Tie bar assembly, guide rod / chrome plating, rod and components Specifications Diameter: D10-D600 mm Length: 1000mm-8000mm Chrome plating thickness :0.02-0 .08mm Surface hardness; HRC55 or more Company also produces: Use of steel, cast iron columns supporting the various processing tie bar nuts and other plastic machinery parts