Cast Steel Roll
Tinvo produces robust alloy cast-steel rolls (Cr, Ni, Mo, V) with high toughness and hot-crack resistance, perfect for heavy-duty mill applications
Introduction
Alloy Cast Steel Roll materials are eutectoid steel and hypereutectoid steel. Adding alloy content such as Cr, Ni, Mo, and V up to more than 0.8%, carbon content 0.4~1.3%. The matrix structure, after heat treatment of normalizing and tempering, becomes sorbite and tempered sorbite. This type of steel mill roll possesses high strength, good toughness, good resistance to hot cracking, and strong impact resistance.
The cast steel roll employs monoblock casting process (single pour): Melting-Casting-Heat Treatment-Machining-Flaw Detection-Finished Products.
Unlike brittle cast iron, TINVO’s Alloy Cast Steel Rolls undergo rigorous normalization and tempering cycles to achieve a refined grain structure. This provides the fracture toughness required to handle the massive reductions in blooming and roughing stands
Application
It can be work rolls for blooming and slab mills, section roughing mill rolls, as well as backup rolls for hot-strip steel rolling mills.
Chemical Composition
| Cast Steel | C | Si | Mn | P | S | Ni | Cr | Mo |
| ZuS60SiCrNiMo | 0.55~0.65 | 0.20~0.45 | 0.90~1.20 | ≤0.035 | ≤0.030 | 0.80~1.20 | 0.30~0.45 | |
| ZuS65SiCrNiMo | 0.60~0.70 | 0.20~0.60 | 0.50~0.80 | ≤0.035 | ≤0.030 | 0.30~0.80 | 0.80~1.20 | 0.30~0.45 |
| Zu70Mn | 0.65~0.75 | 0.20~0.45 | 0.80~1.40 | ≤0.035 | ≤0.030 | |||
| Zu70Mn2 | 0.65~0.75 | 0.20~0.45 | 1.40~1.80 | ≤0.035 | ≤0.030 | |||
| Zu75CrMo | 0.70~0.80 | 0.20~0.45 | 0.60~0.90 | ≤0.035 | ≤0.030 | 0.75~1.00 | 0.30~0.45 | |
| Zu75CrNiMnMo | 0.70~0.80 | 0.20~0.60 | 0.60~1.10 | ≤0.035 | ≤0.030 | 0.30~1.00 | 0.90~1.20 | 0.30~0.45 |
| Zu75Cr3NiMo | 0.70~0.80 | 0.20~0.60 | 0.60~1.10 | ≤0.035 | ≤0.030 | 0.50~1.50 | 2.50~3.00 | 0.30~0.45 |
| Zu80Cr | 0.70~0.85 | 0.20~0.60 | 0.60~1.10 | ≤0.035 | ≤0.030 | 0.50~1.50 | 2.50~3.00 | 0.30~0.45 |
Physical Properties
| Cast Steel | Roll-body hardness HSD | Tensile strength Mpa | Tension% | ToughnessJ/cm |
| ZuS60SiCrNiMo | 32~42 | ≥740 | ≥5 | ≥8 |
Customization
We provide full customization based on your mill’s specific stress analysis. Submit your Technical Drawings for a stress-optimized roll neck and body design.