Brief Introduction


The shell has a remarkable mechanical performance. With virtually no fall of in hardness due to the quantity of graphite remains basically unchanged throughout the working layer. The hardness of roll depends mainly on the type of matrix, namely sorbite, bainite or martensite.       

Mechanical Properties
Hardness of shell HSD60-85
Hardness of neck HSD35-48
Tensile Strength of core ≥450Mpa

Chemical Analysis

Grade Hardness(HSD) C Si Mn Ni Cr Mo
IndefiniteⅠ 60-70 3.0/3.5 0.5/1.0 0.5/1.0 0.5/1.0 0.5/1.0 0.2/0.6
IndefiniteⅡ 62-72 3.0/3.5 0.5/1.0 0.5/1.0 1.0/2.0 0.5/1.0 0.2/0.6
IndefiniteⅢ 65-75 3.0/3.5 0.5/1.0 0.5/1.0 2.0/3.0 0.7/1.2 0.2/0.6
IndefiniteⅣ 70-85 3.0/3.5 0.5/1.0 0.5/1.0 3.0/5.0 1.0/2.0 0.2/0.6


For the finishing stands of continuous rolling mill of strip and bar, the pre-finishing stands of high speed wire, the intermediate and the front of finishing stands of small section, also utilized in thin plate and straightening roll.


Centrifugal Casting Alloy Indefinite Chill Cast Iron Roll and Ring