Sichuan Liaofu Special Steel Company is one of the most experienced manufacturers and suppliers of 21crmov5-7 structural steel bar in China. With over 20 years' experience, our factory offer high quality products made in China with competitive price. Welcome to contact us for wholesale service.
21CrMoV5-7 aly 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°C. 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. 21CrMoV5-7 is a steel for fasteners with specified elevated and/or low temperature properties. Imanite has been designed for nitriding, giving similar hardness distribution as case hardening.
When using nitriding the distortion due to quenching after carburising can be avoided. lmanite is a M-steel version of 21CrMoV5-7. M-treatment is very beneficial when the machining is done in Q&T condition and the hardness is about 300 HBW. Chrome Molybdenum Vanadiumsteel 21CrMoV5-7 is used for steam and gas turbine components and also for high temperature industrial boilers, valves and oil & gas applications. Bolts, studbolts, nuts, washers, bonet bolts parts of the turbine, pumps, valves etc.
| andards | Steel Grades | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | |||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Mo: | V: | Al: | Cu: | |
| DIN | 21CrMoV5-11 - 21 CrMoV 5-11 - 1.8070 | ||||||||||
| 0.17 - 0.25 | 0.3 - 0.6 | 0.30 - 0.60 | <0.035 | <0.035 | 1.2 - 1.5 | <0.6 | 1.0 - 1.2 | 0.25 - 0.35 | - | - | |
DIN 21CrMoV5-7 steel / W-Nr. 1.7709 Steel Regular size and Tolerance
Hot Rolled round bar
| Diameter(mm) | Diameter Tolerance(mm) |
| ≤12.70 | -0.13 ～0.30 |
| 12.7～25.40 | -0.13～0.41 |
| 25.4～38.10 | -0.15～0.51 |
| 38.1～50.80 | -0.20～0.64 |
| 50.80～63.50 | -0.25～0.76 |
| 63.50～76.20 | -0.25～1.02 |
| 76.20～101.60 | -0.30～+1.27 |
| 101.60～203.20 | -0.38～3.81 |
Heat treatment:
890-940℃ quenching, 680-720℃ high temperature tempering (at least 2h)
some other grade we can produce
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