Designation of rolls | Material code | C | Si | Mn | Ni | Cr | Mo | Mg |
Bainite ductile cast iron rolls Centrifugal (Ⅰ) | SGA Ⅰ | 3.00-3.40 | 1.20-2.20 | 0.40-0.80 | 3.01-3.50 | 0.20-0.80 | 0.50-1.00 | ≥0.04 |
Bainite ductile cast iron rolls Centrifugal (Ⅱ) | SGA Ⅱ | 3.00-3.40 | 1.00-2.00 | 0.40-0.80 | 3.51-4.50 | 0.20-1.00 | 0.50-1.00 | ≥0.04 |
Designation of rolls | Material code | Barrel hardness（HSD） | Neck hardness (HSD) | Tensile strength (Mpa) |
Bainite ductile cast iron rolls Centrifugal (Ⅰ) | SGA Ⅰ | 55-78 | 32-45 | ＞350 |
Bainite ductile cast iron rolls Centrifugal (Ⅱ) | SGA Ⅱ | 60-80 | 32-45 | ＞350 |
Designation of rolls | Material code | Microstructure |
Bainite ductile cast iron rolls Centrifugal (Ⅰ) | SGA Ⅰ | Bainite + A small amount of martensite+ Carbide + graphite |
Bainite ductile cast iron rolls Centrifugal (Ⅱ) | SGA Ⅱ | Bainite + A small amount of martensite+ Carbide + graphite |
Designation of rolls | Material code | Application |
Bainite ductile cast iron rolls Centrifugal (Ⅰ) | SGA Ⅰ | Beam, bar, wire rod mil rough rolling, the rolling, pre-finishing mill stand;. seamless steel pipe mill reducing rack set |
Bainite ductile cast iron rolls Centrifugal (Ⅱ) | SGA Ⅱ | Beam, bar, wire rod mil rough rolling, the rolling, pre-finishing mill stand;. seamless steel pipe mill reducing rack set |
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