3.0 Chemical Composition
Steel specification | C | Si | Mn | P | S | Ni | Cr | Mo |
ZuB140CrNiMo | 1.30~1.50 | 0.30~0.60 | 0.70~1.10 | ≤0.035 | ≤0.030 | 0.20~0.80 | 0.80~1.20 | 0.20~0.60 |
ZuB160CrNiMo | 1.50~1.70 | 0.30~0.60 | 0.70~1.10 | ≤0.035 | ≤0.030 | 0.20~1.00 | 0.80~1.20 | 0.20~0.60 |
ZuB180CrNiMo | 1.70~1.90 | 0.30~1.00 | 0.70~1.20 | ≤0.035 | ≤0.030 | 0.60~1.50 | 1.00~1.50 | 0.20~0.80 |
ZuB200CrNiMo | 1.90~2.10 | 0.30~1.00 | 0.70~1.20 | ≤0.035 | ≤0.030 | 1.00~2.00 | 1.20~2.00 | 0.20~0.80 |
4.0 Physical Properties
Steel specification | Roll-body hardness HSD | Tensile strength Mpa | Ductility % | Impact toughness J/cm |
ZuB140CrNiMo | 35~45 | ≥590 | ≥1.0 | ≥4 |
ZuB160CrNiMo | 38~53 | ≥540 | ≥1.0 | ≥4 |
ZuB180CrNiMo | 42~55 | ≥500 | ≥0.5 | ≥4 |
ZuB200CrNiMo | 45~60 | ≥450 | ≥0.5 | ≥4 |
5.0 Metallographic Structure
The metallurgical structure of roll-body work layer is: Pearlite + carbide or fine pearlite + a little bainite + carbide