... steel (42GrMo,38GrMoAI), heating treatment and mechanical processing, hardness is HRC55~58.2.Inner structure: single-layer, multi-layer ... compact, adhesion strong.4.Precision: temperature difference <= 1°C, heating transform <= 0.02mm, concentric <= 0.005mm.5.Application: ... For example, anilox roller, embossing roller, mirror roller, heating roller, cooling roller, woolen paper roller, rubber roller, ...