Sichuan Liaofu Special Steel Company is one of the most experienced manufacturers and suppliers of 21crmov5-7 steel bar 1.7709 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 DIN 1.7709 AFNOR 20CDV5-07 alloy steel bar
we also have 21crmov5-11 1.8070 steel
21CrMov5-7, code: 1.7709 Standard: DIN17240-1976, heat treatment status: 890-940℃ quenching, 680-720℃ high temperature tempering (at least 2h) yield strength, N: min.550 tensile strength, N: 700-850 mechanical properties
| 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 | - | - | |
Bar 21CrMoV5-7+QT 1.7709
Round Bar 21CrMoV5-7+QT 1.7709
Hot Rolled Bar 21CrMoV5-7+QT 1.7709
Hex Bar 21CrMoV5-7+QT 1.7709
Equivalent 1.7709 -CSN 15320.5, CSN 15320.6
Equivalent 1.7709 – B16, SA193-B16
Equivalent 1.7709 – 1.7711
Equivalent 21CrMoV5-7+QT -CSN 15320.5, CSN 15320.6
Equivalent 21CrMoV5-7+QT – B16, SA193-B16
Equivalent 21CrMoV5-7+QT – 1.7711
On stock 1.7709 / 21CrMoV5-7+QT
Supplier 1.7709 / 21CrMoV5-7+QT
21CrMoV5-7, 1.7709 - description and application
21HMF alloy structural steel and its 21CrMoV5-7 / (i.e) 21CrMoV5-11 replacement alloys belong to the group of high temperature boiler steels for energy industries. They are used in the production of components/subassemblies for the power industry, working at the temperatures up to 550 oC for small parts and for large forgings. The main applications of these grades of steel are rotors of steam turbines, rotor blades, shaft forgings, reservoirs and covers for up to 550 ℃ temperatures, nuts, tubes for high temperatures up to 540 ℃.
| W-Nr. | Material Designation | Alternative Designations |
|---|---|---|
| 1.2312 | 40CrMnMoS8-6 | AISI P20+S |
| 1.2311 | 40CrMnMo7 | AISI P20 |
| 1.2738 | 40CrMnNiMo8-6-4 | AISI P20+Ni |
| 1.2343 | X37CrMoV5-1 | AISI H11 |
| 1.2344 | X40CrMoV5-1 | AISI H13 |
| 1.2367 | X38CrMoV5-3 | Z38CDV5-3 |
| 1.2713 | 56NiCrMoV7 | 55NiCrMoV7 - AISI |
| 1.2787 | X22CrNi17 | X23CrNi17 |
| 1.2999 | X45MoCrV5-3-1 | |
| 1.2885 | X32CrMoCoV3-3-3 | |
| 1.2764 | X19CrNiMo4 | AISI P21 |
| 1.2581 | 30WCrV9-3 | Z30WCV9 - AISI H21 |
| 1.2365 | 32CrMoV12-28 | AISI H10 |
| 1.2567 | 30WCrV5-3 | WWS1 |
| 1.2510 | 100MnCrW4 | AISI O1 - T31501 |
| 1.2235 | 80CrV2 | |
| 1.2063 | 145Cr6 | NC6 - 12Ch1 |
| 1.2201 | NC10 | X165CrV12 |
| 1.2080 | X210Cr12 | AISI D4 - T30404 |
| 1.2210 | 115CrV3 | AISI L2 - T61202 |
| 1.2360 | X48CrMoV8-1-1 | |
| 1.2381 | 73MoV5-2 | |
| 1.2721 | 50NiCr13 | |
| 1.2328 | 45CrMoV7 | |
| 1.2249 | 45SiCrV6 | |
| 1.2243 | 61CrSiV5 | |
| 1.2208 | 31CrV3, 31CrV2 | |
| 1.2990 | 100CrMoV8-1-1 | |
| 1.2162 | 21MnCr5 | |
| 1.2826 | 60MnSiCr4 |
some other grade we can produce
FAQ
Q: What is the maximum operating temperature for 21CrMoV5-7?
A: It is designed for high-temperature service up to 550°C (1022°F) for small parts and 540°C for high-temperature tubes. Exceeding this limit will cause a rapid drop in creep strength and oxidation resistance, which can lead to part failure.
Q: How does 21CrMoV5-7 compare to 21CrMoV5-11 (1.8070)?
A: They are very similar, but 21CrMoV5-11 has slightly higher molybdenum and vanadium content. 21CrMoV5-7 (1.7709) is often used for large turbine rotors and high-temperature fasteners (like bolts), while 21CrMoV5-11 is used for smaller, highly stressed components.
Q: Can this material be supplied with ultrasonic testing (UT) for critical turbine parts?
A: Yes. Because it is used in high-pressure and high-temperature environments (like power plants), internal defects are unacceptable. We supply this material forged and rough-machined with third-party UT testing according to your required standards.
Q: What kind of heat treatment is required for 21CrMoV5-7?
A: The standard heat treatment is quenching at 890-940°C followed by high-temperature tempering at 680-720°C for at least 2 hours. This produces a yield strength of min. 550 MPa and a tensile strength of 700-850 MPa.
Q: Do you offer this grade as a pre-hardened (Q&T) bar?
A: Yes, we supply 21CrMoV5-7 in the Q&T (+QT) condition directly from our warehouse. The base material is produced at our in-house base, and the heat treatment is completed by our qualified partner heat treaters to ensure the exact mechanical properties you need.
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