... over the world, which is famous manufacture in making rollers. Steel Roller’s DetailsSteel Roller, Shanghai Donghui Roller is an ... question, let us know.Materials: 20#, 45#, forge alloy steel (42GrMo,38GrMoAI), heating treatment and mechanical processing, hardness is ... max length is 6000 mm.Raw material is Carbon steel, alloy steel, stainless steel and others.Embossing roller, laser engravuring, 3D ...