Products

Double Poured Indefinite Chill (DPIC) Rolls

Double Poured Indefinite Chill (DPIC) Rolls are high-performance composite rolls manufactured using the double pouring method, where a hard, wear-resistant outer shell is metallurgically bonded to a tougher, ductile iron or steel core. The outer working layer is composed of indefinite chill iron, featuring fine graphite and carbide dispersions in a martensitic or bainitic matrix. This gives the rolls exceptional hardness with superior wear resistance and thermal stability.

The double pour process ensures a strong bond between the shell and core, enabling the roll to maintain high performance under severe rolling conditions, while resisting shock and mechanical stresses. These rolls are ideal for applications requiring consistent surface finish and dimensional accuracy over long campaigns.

  • Hard working layer (40–80 HSD) with a tough, shock-resistant core
  • Excellent wear resistance and surface finish retention
  • High thermal conductivity and resistance to fire cracks
  • Uniform hardness across the shell depth
  • Custom sizes and grades available to suit specific mill requirements

SG DPIC Rolls are extensively used in high-speed and high-load rolling applications where both surface durability and core strength are critical. These include:

  • TMT Bar Mills – Ideal for roughing and intermediate stands to maintain consistent roll performance
  • Section Mills – Used for rolling channels, beams, and angles with excellent shape retention
  • Wire Rod Mills – Ensures smooth surface finish and accurate dimensions
  • Strip and Plate Mills – Maintains surface quality even under thermal fatigue conditions
  • Re-Rolling Mills – For hot and semi-hot rolling of billets into structural shapes and flats
  • DPIC Rolls offer a cost-effective and reliable solution for continuous rolling operations, reducing roll changes, improving mill productivity, and ensuring consistent product quality.

    • Carbon Silicon Manganese Nickle Chromium Molybdenum Hardness Tensile Strength
    (DPIC 1) Shell 2.90-3.30 1.0-Max 0.50-1.00 2.50-3.00 1.00-1.50 0.25-0.50 65-75 350-500
    (DPIC 1) Core 3.10-3.50 1.50-Max 0.60-0.90 0.40-1.00 0.25-0.50 - 30-40 350-500
    (DPIC 2)Shell 3.20-3.50 1.0-Max 0.50-0.70 2.50-3.50 1.20-1.80 0.25-0.50 75-85 350-500
    (DPIC 2) Core 3.20-3.50 1.50-Max 0.60-0.90 < = 1.00 0.25-0.50 - 30-40 350-500