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PF 103

Nodular cast iron rolls (rings) are characterized by the nodular shaped graphite in the microstructure. Through adjusting the alloy elements of Ni, Cr, Mo and heat treatment technique, the different type of rolls (rings) of popular nodular graphite cast iron, large scale alloyed nodular graphite cast iron, pearlitic nodular graphite cast iron and acicular nodular graphite cast iron can be manufactured. All these types of rolls (rings) have high strength , excellent thermal properties and resistance to accidents and there is very little hardness drop in the surface work layer.

Microstructure:

Chemical Composition (%) Symbol C Si Mn Cr Ni Mo Mg SGP-1 2.9-3.8 0.8-2.5 0.4-1.2 0.2-0.6 - 0.2-0.6 >0.04  SGP-2 2.9-3.8 0.8-2.5 0.4-1.2 0.2-0.6 0.2-2.5 0.2-0.6 >0.04  SGP-3 3.0-3.6 1.6-2.3 0.3-1.0 0.1-1.4 1.2-2.1 0.2-0.6 >0.04  SGP-4 3.0-3.6 1.0-2.4 00.2-1.0 0.5-1.2 1.0-3.5 0.2-0.8 >0.04  SGAC 3.0-3.6 1.2-2.4 0.2-0.8 0.2-1.0 3.2-4.5 0.3-1.0 >0.04     Physical Properties: Symbol Shell HS Uniformity of hardness HS Neck hardness HS Tensile strength MPa SGP-1 58-70 - 35-55 >320 SGP-2 62-70 - 35-55 >352 SGP-3 42-55 <5 32-43 >390 SGP-4 50-72 <5 35-55 >390 SGAC 55-75 <5 40-60 >400    Application: SGP-1 Rolls for roughing and intermediate stands of bar, rod and section mills, vertical rolls of beam mills. SGP-2 Rolls for roughing and intermediate stands of bar, rod and section mills. SGP-3 Rolls for blooming mills. SGP-4 Rolls for roughing and intermediate stands of continuous section mills, bar, rod mills and seamless tube mills. SGAC Rolls for intermediate, finishing stands of continuous section mills, rolls and ring for seamless tube mills, rolls and rings for intermediate, pre-finishing, finishing stands of bar, rod, screw mills.    The capacity of making: Type Diameter of barrel (mm) Length of barrel (mm)   rolls rings £X190-1500 900(max)