... : 20#, 45#, forge alloy steel (42GrMo,38GrMoAI), heating treatment and mechanical processing, hardness is HRC55~58.2. ... Processing: Hard Chrome plating (Dupont formula), chrommantel compact, adhesion strong.4.Precision: temperature difference <= 1°C, heating transform <= 0 ... For example, anilox roller, embossing roller, mirror roller, heating roller, cooling roller, woolen paper roller, rubber roller, ...