Chemical Analysis
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 |
Physical Properties
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 |
Microstructure
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 |
Application
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 |