High Chromium Cast Iron Rolls
What are High Chromium Cast Iron Rolls?
High Chromium Cast Iron Rolls (Hi-Cr Rolls) are a premium class of cast iron rolls designed to withstand the most demanding rolling conditions. With their unique microstructure and high chromium content, these rolls deliver excellent wear resistance, heat stability, and consistent performance across various rolling mills.
High Chromium Cast Iron Rolls
Material Characteristics
The alloy composition of High Chromium Cast Iron Rolls typically includes 12–20% chromium, coupled with carbon and other alloying elements. This chemistry forms a hard martensitic and carbide-rich structure that provides:
- Superior Wear Resistance – The high chromium carbides in the roll barrel protect against abrasion, extending service life.
- High Hardness Retention – Even under elevated rolling temperatures, Hi-Cr rolls maintain their hardness.
- Thermal Fatigue Resistance – Enhanced ability to withstand thermal shocks during intensive rolling campaigns.
- Surface Quality – Stable roll surface reduces the risk of defects, ensuring smooth steel finishes.
Properties of High Chromium Cast Iron Rolls
| Material Category | Material Name | Material Code | C | Si | Mn | P | S | Cr | Ni | Mo | V | Mg | Hardness (HSD) Barrel | Hardness (HSD) Neck | Recommended Applications |
| High Chromium Iron Rolls | High Cr I | HCr I | 2.30 ~ 3.30 | 0.30 ~ 1.00 | 0.50 ~ 1.20 | ≤0.10 | ≤0.05 | 12.00 ~ 15.00 | 0.70 ~ 1.70 | 0.70 ~ 1.50 | 0.00 ~ 0.60 | — | 60 ~ 75 | 32 ~ 45 | Work rolls, vertical rolls, temper rolls for hot and cold rolled strip steel, work rolls for medium and heavy plates, universal horizontal roll rings, vertical roll rings and straightening rolls for section steel |
| High Cr II | HCr II | 2.30 ~ 3.30 | 0.30 ~ 1.00 | 0.50 ~ 1.20 | ≤0.10 | ≤0.05 | 15.01 ~ 18.00 | 0.50 ~ 1.70 | 0.70 ~ 1.50 | 0.00 ~ 0.60 | — | 65 ~ 80 | 32 ~ 45 | ||
| High Cr III | HCr III | 2.30 ~ 3.30 | 0.30 ~ 1.00 | 0.50 ~ 1.20 | ≤0.10 | ≤0.05 | 18.01 ~ 22.00 | 0.50 ~ 1.70 | 1.01 ~ 3.00 | 0.00 ~ 0.60 | — | 75 ~ 90 | 32 ~ 45 |
Applications
High Chromium Cast Iron Rolls are widely used in:
- Hot Strip Mills – For finishing stands requiring both wear and heat resistance.
- Plate Mills – Providing durability in roughing and finishing applications.
- Section Mills – Where roll surface stability is critical for product accuracy.
- Wire Rod and Bar Mills – Ensuring extended rolling cycles and consistent product quality.
Benefits for Steel Producers
Investing in Hi-Cr Cast Iron Rolls brings significant operational and economic advantages:
- Reduced roll consumption and changeover downtime
- Improved product surface quality and dimensional precision
- Lower cost per ton of rolled steel due to extended campaign life
Why Choose SATRAD GROUP
At SATRAD GROUP, we supply High Chromium Cast Iron Rolls engineered with advanced metallurgical control and precision casting technology. Each roll is designed to meet the specific rolling requirements of our customers, ensuring higher productivity, longer service life, and optimized cost performance.
If you are looking for rolls that combine hardness, heat resistance, and reliable performance, our team is ready to provide tailored solutions for your mill. Contact SATRAD GROUP today to discuss your needs and discover how Hi-Cr Rolls can elevate your production efficiency.
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