Designation of rolls | Material code | C | Si | Mn | Ni | Cr | Mo |
CrMo indefinite chilled cast iron rolls | IC | 3.1-3.4 | 0.6-0.9 | 0.5-1.0 |
| 0.7-1.1 | 0.2-0.6 |
NICrMo indefinite chilled cast iron rolls(Ⅰ) | IC(Ⅰ) | 3.1-3.4 | 0.6-0.9 | 0.5-1.0 | 0.6-0.8 | 0.7-1.1 | 0.2-0.6 |
NiICrMo indefinite chilled cast iron rolls(Ⅱ) | IC(Ⅱ) | 3.1-3.4 | 0.6-1.0 | 0.5-1.0 | 2.2-2.8 | 0.7-1.1 | 0.2-0.6 |
NiCrMo indefinite chilled cast iron rolls(Ⅲ) | IC(Ⅲ) | 3.1-3.4 | 0.6-1.0 | 0.5-1.0 | 2.2-2.8 | 0.8-1.3 | 0.2-1.0 |
NiCrMo indefinite chilled cast iron rolls(Ⅳ) | IC(Ⅳ) | 3.1-3.4 | 0.6-1.0 | 0.5-1.0 | 3.1-4.3 | 1.0-1.3 | 0.2-1.0 |
NiCrMo indefinite chilled cast iron rolls(Ⅴ) | IC(Ⅴ) | 3.1-3.4 | 0.6-1.2 | 0.5-1.0 | 3.8-4.5 | 1.4-2.0 | 0.2-1.2 |
Designation of rolls | Material code | Barrel hardness(HSD) | Neck hardness (HSD) | Tensile strength (Mpa |
CrMo indefinite chilled cast iron rolls | IC | 50-70 | 35-55 | >160 |
NICrMo indefinite chilled cast iron rollsⅠ) | IC(Ⅰ) | 55-72 | 35-55 | >160 |
NiICrMo indefinite chilled cast iron rolls(Ⅱ) | IC(Ⅱ) | 55-72 | 35-55 | >160 |
NiCrMo indefinite chilled cast iron rolls(Ⅲ) | IC(Ⅲ) | 65-78 | 35-55 | >350 |
NiCrMo indefinite chilled cast iron rolls(Ⅳ) | IC(Ⅳ) | 70-83 | 35-55 | >350 |
NiCrMo indefinite chilled cast iron rolls(Ⅴ) | IC(Ⅴ) | 77-82 | 35-55 | >350 |
Designation of rolls | Material code | Microstructure |
CrMo indefinite chilled cast iron rolls | IC | Pearlite+ cementite+ small percentage graphite |
NICrMo indefinite chilled cast iron rollsⅠ) | IC(Ⅰ) | Pearlite+ cementite+ small percentage graphite |
NiICrMo indefinite chilled cast iron rolls(Ⅱ) | IC(Ⅱ) | Fine Pearlite+ cementite+ small percentage graphite |
NiCrMo indefinite chilled cast iron rolls(Ⅲ) | IC(Ⅲ) | Sorbite cementite + small percentage graphite |
NiCrMo indefinite chilled cast iron rolls(Ⅳ) | IC(Ⅳ) | Sorbite tempered bainite+ carbide +graphite + A small amount of martensite or bainite + carbide +graphite |
NiCrMo indefinite chilled cast iron rolls(Ⅴ) | IC(Ⅴ) | Sorbite tempered bainite+ carbide +graphite + A small amount of martensite or bainite + carbide +graphite |
Designation of rolls | Material code | Application |
CrMo indefinite chilled cast iron rolls | IC | Section mill、bar mill、intermediate and finishing stands of wire–rod mill |
NICrMo indefinite chilled cast iron rollsⅠ) | IC(Ⅰ) | Section mill、bar mill、intermediate and finishing stands of wire–rod mill |
NiICrMo indefinite chilled cast iron rolls(Ⅱ) | IC(Ⅱ) | Section mill、bar mill、intermediate and finishing stands of wire–rod mill |
NiCrMo indefinite chilled cast iron rolls(Ⅲ) | IC(Ⅲ) | Section mill、bar mill、intermediate and finishing stands of wire–rod mill |
NiCrMo indefinite chilled cast iron rolls(Ⅳ) | IC(Ⅳ) | Profile, rod and wire, narrow strip mill finishing stand, Plate fiat rack, strip finishing |
NiCrMo indefinite chilled cast iron rolls(Ⅴ) | IC(Ⅴ) | Plate. flat rack, strip finishing |
Designation of rolls | Material code | C | Si | Mn | Ni | Cr | Mo |
NICrMo chilled cast iron rolls (Ⅰ) | CC (Ⅰ) | 3.00-3.40 | 0.30-0.80 | 0.20-1.00 | 0.50-1.00 | 0.20-0.60 | 0.20-0.60 |
NICrMo chilled cast iron rolls (Ⅱ) | CC (Ⅱ) | 3.00-3.40 | 0.30-0.80 | 0.20-1.00 | 1.10-2.00 | 0.30-1.20 | 0.20-0.60 |
NICrMo chilled cast iron rolls (Ⅲ) | CC (Ⅲ) | 3.00-3.40 | 0.30-0.80 | 0.20-1.00 | 2.10-3.00 | 0.50-1.50 | 0.20-0.60 |
NICrMo chilled cast iron rolls(Ⅳ) | CC(Ⅳ) | 3.00-3.40 | 0.30-0.80 | 0.20-1.00 | 3.10-4.00 | 0.50-1.70 | 0.20-0.60 |
Designation of rolls | Material code | Barrel hardness(HSD) | Neck hardness (HSD) | Tensile strength (Mpa |
NICrMo chilled cast iron rolls (Ⅰ) | CC (Ⅰ) | 60-70 | 32-50 | >150 |
NICrMo chilled cast iron rolls (Ⅱ) | CC (Ⅱ) | 62-75 | 35-52 | >150 |
NICrMo chilled cast iron rolls (Ⅲ) | CC (Ⅲ) | 65-80 | 32-45 | >350 |
NICrMo chilled cast iron rolls(Ⅳ) | CC(Ⅳ) | 70-85 | 32-45 | >350 |
Designation of rolls | Material code | Microstructure |
NICrMo chilled cast iron rolls (Ⅰ) | CC (Ⅰ) | Pearlite + cementite |
NICrMo chilled cast iron rolls (Ⅱ) | CC (Ⅱ) | Fine pearlite + cementite |
NICrMo chilled cast iron rolls (Ⅲ) | CC (Ⅲ) | Fine pearlite cementite |
NICrMo chilled cast iron rolls(Ⅳ) | CC(Ⅳ) | sorbite+ cementite |
Designation of rolls | Material code | Application |
NICrMo chilled cast iron rolls (Ⅰ) | CC (Ⅰ) | Section mill、bar mil. wire-rod mill narrow strip mill、finishing stand |
NICrMo chilled cast iron rolls (Ⅱ) | CC (Ⅱ) | Section mill、bar mil. wire-rod mill narrow strip mill、finishing stand |
NICrMo chilled cast iron rolls (Ⅲ) | CC (Ⅲ) | Section mill、bar mil. wire-rod mill narrow strip mill、finishing stand |
NICrMo chilled cast iron rolls(Ⅳ) | CC(Ⅳ) | Section mill、bar mil. wire-rod mill narrow strip mill、finishing stand |
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 |
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 |
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 |
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 |
Designation of rolls | Material code | C | Si | Mn | Ni | Cr | Mo | Mg |
Pearlitic ductile cast iron rolls (Ⅰ) | SGPⅠ | 3.00-3.40 | 1.40-1.90 | 0.40-0.80 | 1.50-2.00 | 0.20-0.60 | 0.20-0.60 | ≥0.04 |
Pearlitic ductile cast iron rolls (Ⅱ) | SGPⅡ | 3.00-3.40 | 1.20-2.00 | 0.40-0.80 | 2.01-2.50 | 0.20-1.00 | 0.20-0.60 | ≥0.04 |
Pearlitic ductile cast iron rolls (Ⅲ) | SGPⅢ | 3.00-3.40 | 1.00-2.00 | 0.40-0.80 | 2.51-3.00 | 0.20-1.00 | 0.20-0.60 | ≥0.04 |
Designation of rolls | Material code | Barrel hardness(HSD) | Neck hardness (HSD) | Tensile strength (Mpa) |
Pearlitic ductile cast iron rolls (Ⅰ) | SGPⅠ | 45-55 | 35-55 | >450 |
Pearlitic ductile cast iron rolls (Ⅱ) | SGPⅡ | 55-65 | 35-55 | >450 |
Pearlitic ductile cast iron rolls (Ⅲ) | SGPⅢ | 62-72 | 35-55 | >450 |
Designation of rolls | Material code | Microstructure |
Pearlitic ductile cast iron rolls (Ⅰ) | SGPⅠ | Pearlite + cementite+ small Graphite |
Pearlitic ductile cast iron rolls (Ⅱ) | SGPⅡ | Pearlite + cementite+ small Graphite |
Pearlitic ductile cast iron rolls (Ⅲ) | SGPⅢ | Globular pearlite + carbide + graphite Or a small amount of pearlite +bainite +carbide + spherical graphite |
Designation of rolls | Material code | Application |
Pearlitic ductile cast iron rolls (Ⅰ) | SGPⅠ | Profiles, rods, wire and narrow strip mill thick, in the rolling mill stand |
Pearlitic ductile cast iron rolls (Ⅱ) | SGPⅡ | Profiles, rods, wire and narrow strip mill thick, in the rolling mill stand |
Pearlitic ductile cast iron rolls (Ⅲ) | SGPⅢ | Profiles, rods, wire and narrow strip mill thick, in the rolling mill stand |
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 |
Designation of rolls | Material code | C | Si | Mn | Ni | Cr | Mo |
Centrifugal cast iron rolls (Ⅰ) | HCrⅠ | 3.00-3.30 | 0.30-1.00 | 0.50-1.20 | 0.70-1.70 | 12.00-15.00 | 0.70-1.50 |
Centrifugal cast iron rolls (Ⅱ) | HCrⅡ | 3.00-3.30 | 0.30-1.00 | 0.50-1.20 | 0.70-1.70 | 15.01-18.00 | 0.70-1.50 |
Centrifugal cast iron rolls (Ⅲ) | HCrⅢ | 3.00-3.30 | 0.30-1.00 | 0.50-1.20 | 0.70-1.70 | 18.01-22.00 | 1.51-3.00 |
Designation of rolls | Material code | Barrel hardness(HSD) | Neck hardness (HSD) | Tensile strength (Mpa |
Centrifugal cast iron rolls (Ⅰ) | HCrⅠ | 60-75 | 32-45 | >350 |
Centrifugal cast iron rolls (Ⅱ) | HCrⅡ | 65-80 | 32-45 | >350 |
Centrifugal cast iron rolls (Ⅲ) | HCrⅢ | 75-90 | 32-45 | >350 |
Designation of rolls | Material code | Microstructure |
Centrifugal cast iron rolls (Ⅰ) | HCrⅠ | Bainite +carbide |
Centrifugal cast iron rolls (Ⅱ) | HCrⅡ | Bainite +carbide |
Centrifugal cast iron rolls (Ⅲ) | HCrⅢ | A small amount of bainite + martensite + carbide |
Designation of rolls | Material code | Application |
Centrifugal cast iron rolls (Ⅰ) | HCrⅠ | Beam, bar, wire rod mill finishing stand; Tropical rough rolling and rolling and finishing work roll front; Wide plate mill work roll; |
Centrifugal cast iron rolls (Ⅱ) | HCrⅡ | Beam, bar, wire rod mill finishing stand; Tropical rough rolling and rolling and finishing work roll front; Wide plate mill work roll; |
Centrifugal cast iron rolls (Ⅲ) | HCrⅢ | Beam, bar, wire rod mill finishing stand; Tropical rough rolling and rolling and finishing work roll front; Wide plate mill work roll; |
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