Our Customer Speaks

  • “ We are purchasing DPIC, ALLOY STEEL etc., for More than 10 years and found that their quality is up to our satisfaction. ” ARS Steel - K.Shrineevas Meera Reddy
  • “ Shiva Alloy rolls Product Quality is good.” Fernando
  • " Good and well designed product and Quick Delivery " Vel

Spheroidal Graphite Cast Iron Rolls (Nodular Iron Rolls)

These static cast Rolls are structurally characterized by nodular graphite. High Tensile strength and deep hardness penetration are few properties that nodular graphite gives these Metal Rolls. Because of excellent mechanical & material properties these Metal Rolls are capable of withstanding heavy loads and hence these Rolls are used in various Mills that produce different products. These Rolls are structurally made up of cementite and nodular graphite. Sufficient water cooling is a necessity for satisfactory performance.

Depending upon the required mechanical properties i.e. wear resistance, Roll hardness, strength, of Rolls, wide range of Rolls:

1. Pearlitic and 2.Bainitic Accicular can be made by alloying with nickel, molybdenum and chromium for added strength and deep hardness penetration.

Applications of Spheroidal Graphite Iron Rolls include :

  • Blooming, section and wire rod roughing.
  • Wire rod roughing and intermediate rolling.
  • Plate intermediate and finish rolling.
  • Roughing, intermediate and finishing for Rail and Structural mills.

Size limitation :

  • :

    600 mm diameter
  • :

    150 mm diameter

Material Specifications :

Spheroidal Graphite Cast Iron Rolls

Nodular Iron Rolls NIP 1 NIP 2 NIA 1 NIA 2
Composition (%wt)
Carbon (C) 2.90-3.20 3.00-3.40 3.10-3.50 3.25-3.55
Silicon (Si) 1.50-2.00 1.50-1.80 1.20-1.50 1.10-1.40
Manganese (Mn) 0.70 MAX 0.70 MAX 0.70 MAX 0.70 MAX
Nickel (Ni) 1.40-1.80 1.50-1.90 2.50-3.00 2.80-4.00
Chromium (Cr) 0.40-0.60 0.40-0.70 0.30-0.70 0.30-0.80
Molybdenum (Mo) 0.25-0.45 0.25-0.45 0.60-1.10 0.70-1.20
Mechanical Properties
Hardness (HSC) 45-55 55-65 65-75 75-80
Tensile strength (N/mm2) 400-500 400-500 500-600 500-600

Graph 1: Hardness drop curve for Spheroidal Graphite Cast Iron Rolls, NIP: Nodular Iron Pearlitic, NIA: Nodular Iron Accicular

Product Enquiry :