21CrMoV5-7 alloy structural steel and its 21CrMoV5-11/(ie) 21CrMoV5-11 substitute alloy belong to the high-temperature boiler steel for energy industry. They are used to produce components/subassemblies for the power industry, small parts and large forgings at temperatures up to 550 oC. The main applications of these steel grades are rotors for steam turbines, rotor blades, shaft forgings, vessels and covers for temperatures up to 550°C, nuts, pipes for temperatures up to 540°C.
| 1" rowspan="2" style="word-break: break-all;">Grade | 11" style="word-break: break-all;">Chemical Composition WT % | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Mn | Si | P | S | Cr | Ni | Mo | V | Al | Cu | |
| 21CrMoV5-7, 1.7709 | 0.17 - 0.25 | 0.4 - 0.8 | Max 0.4 | Max 0.025 | Max 0.030 | 1.2 - 1.5 | Max 0.6 | 0.55 - 0.80 | 0.20 - 0.35 | Max 0.3 | - |
| 25Ch1M1F, 21Kh1M1F, 25Х1М1Ф | 0.22 - 0.29 | 0.4 - 0.7 | 0.17 - 0.37 | Max 0.030 | Max 0.025 | 1.5 - 1.8 | Max 0.3 | 0.25 - 0.35 | 0.15 - 0.30 | - | Max 0.2 |
| 21CrMoV5-11, 1.8070 | 0.17 - 0.25 | 0.3 - 0.6 | 0.30 - 0.60 | Max 0.035 | Max 0.035 | 1.2 - 1.5 | Max 0.6 | 1.0 - 1.2 | 0.25 - 0.35 | - | - |
| 20CDV5-07 | 0.17 - 0.24 | 0.3 - 0.6 | Max 0.5 | Max 0.015 | Max 0.015 | 1.1 - 1.5 | Max 0.5 | 0.5 - 0.8 | 0.15 - 0.35 | - | - |
| Grade | Shape | Dimensionmm | Qty.kg |
|---|---|---|---|
| 21CrMoV5-7, 1.7709 | Round bar | Φ180 | 12085 |
| 21CrMoV5-7 | Ingot | 568 |
Steel grade
Special steel