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Recommended Applications
- Hot rolling mills
- Roughing and intermediate stands
- Work roll and backup roll positions
- Heavy-duty rolling applications
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Graphite Steel Rolls for Section and Bar Mills
LONSUN supplies graphite steel rolls for grooved and thermally loaded rolling positions. Selection is based on mill type, stand position, pass geometry, required toughness, hardness, resistance to fire cracking and the performance of the current roll.
Discuss Your Graphite Steel Roll RequirementGraphite steel rolls have a pearlitic matrix containing spherical graphite and carbides. This material direction combines steel-grade strength with practical hardness, while the graphite helps resist fire cracking and scale adhesion. Grade and hardness must still be matched to the actual stand and pass.
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Enhanced ICDP Rolls for Demanding Finishing Applications
LONSUN supplies Enhanced ICDP rolls for hot-strip finishing and selected high-speed flat-product duties. Selection is based on stand position, strip surface requirement, hardness, current ICDP performance, thermal conditions, campaign target and grinding practice.
Discuss Your Enhanced ICDP Roll RequirementEnhanced ICDP rolls develop the conventional ICDP concept with a bainitic and martensitic matrix containing Fe3C and MC carbides together with fine free graphite. Double tempering is used to control retained austenite, hardness and residual stress. The upgrade should be evaluated against a defined conventional-roll baseline.
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Alloy Cast Steel Rolls for Heavy Rolling Duties
LONSUN supplies alloy cast steel rolls for roughing, backup, vertical and universal mill applications. Grade selection is based on rolling load, required toughness, barrel hardness, pass duty, current roll performance and the operating risks of the stand.
Discuss Your Alloy Cast Steel Roll RequirementAlloy cast steel rolls have lower carbon content than Adamite, high-chromium steel and graphite steel rolls. They are produced from alloyed molten steel with controlled casting and heat treatment to provide toughness, mechanical strength, wear resistance and fire-crack resistance for heavy rolling conditions.
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Enhanced HiCr Iron and HiCr Steel Rolls for Hot Rolling Mills
LONSUN supplies enhanced high-chromium cast iron and high-chromium cast steel rolls for hot-strip, plate, Steckel, skin-pass and selected section-mill duties. Selection must distinguish the iron and steel material directions before hardness or application is compared.
Discuss Your Enhanced HiCr Roll RequirementEnhanced HiCr iron uses a high-chromium shell without free graphite and a tempered martensitic matrix with hard carbides. HiCr steel has lower carbon and a different carbide direction, providing a separate balance of strength and wear resistance. These are related but not interchangeable roll families.