Chemical Analysis
Designation of rolls | Material code | C | Si | Mn | Ni | Cr | Mo | Mg |
CrMo indifinite chilled SG cast iron rolls | SG Ⅱ | 3.00-3.40 | 1.40-1.90 | 0.20-0.80 |
| 0.20-0.60 | 0.20-0.60 | ≥0.04 |
NiCrMo indifinite chilled SG cast iron rolls (Ⅰ) | SG Ⅳ | 3.00-3.40 | 1.40-1.90 | 0.40-0.80 | 0.50-1.00 | 0.20-0.60 | 0.20-0.60 | ≥0.04 |
NiCrMo indifinite chilled SG cast iron rolls (Ⅱ) | SG Ⅴ | 3.00-3.40 | 1.40-1.90 | 0.40-0.80 | 1.10-2.00 | 0.30-1.00 | 0.20-0.60 | ≥0.04 |
Physical Properties
Designation of rolls | Material code | Barrel hardness（HSD） | Neck hardness (HSD) | Tensile strength (Mpa |
CrMo indifinite chilled SG cast iron rolls | SG Ⅱ | 50-70 | 35-55 | ＞320 |
NiCrMo indifinite chilled SG cast iron rolls (Ⅰ) | SG Ⅳ | 55-70 | 35-55 | ＞320 |
NiCrMo indifinite chilled SG cast iron rolls (Ⅱ) | SG Ⅴ | 60-70 | 35-55 | ＞320 |
Microstructure
Designation of rolls | Material code | Microstructure |
CrMo indifinite chilled SG cast iron rolls | SG Ⅱ | Pearlite+ cementite+ small Graphite |
NiCrMo indifinite chilled SG cast iron rolls (Ⅰ) | SG Ⅳ | Pearlite+ cementite+ small Graphite |
NiCrMo indifinite chilled SG cast iron rolls (Ⅱ) | SG Ⅴ | Fine pearlite + cementite + small Graphite |
Application
Designation of rolls | Material code | Application |
CrMo indifinite chilled SG cast iron rolls | SG Ⅱ | Profiles, rods, wire and narrow strip mill thick, in the rolling mill stand |
NiCrMo indifinite chilled SG cast iron rolls (Ⅰ) | SG Ⅳ | Profiles, rods, wire and narrow strip mill thick, in the rolling mill stand |
NiCrMo indifinite chilled SG cast iron rolls (Ⅱ) | SG Ⅴ | Profiles, rods, wire and narrow strip mill thick, in the rolling mill stand |