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- MERKBLATT AD 2000 W2/W7/W10
21CrMoV5-7 Mechanical Properties (EN 10269 / 1.7709)
The mechanical-property floor for 21CrMoV5-7 (Werkstoff 1.7709) in the quenched-and-tempered condition is fixed by EN 10269. The standard sets minimum acceptance values at room temperature plus the elevated-temperature 0.2 percent proof stress at the design metal temperature. Datasheet values from BGH, Boden and Virgamet typically exceed the EN 10269 floor by 10 to 20 percent.
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Room-Temperature Mechanical Properties
| Property | Value | Condition |
|---|---|---|
| Tensile (Rm) | 700 to 850 MPa | RT, Q+T |
| 0.2 percent proof stress (Rp0.2) | ≥550 MPa | RT, Q+T |
| Elongation A5 | ≥16 percent | RT, longitudinal |
| Charpy V impact (KV) | ≥63 J | 20 deg C |
| 0.2 percent proof at 500 deg C | ≥450 MPa | elevated-temp |
| Hardness | 210 to 250 HBW | Q+T |
Elevated-Temperature 0.2 Percent Proof Stress
| Test temperature | 0.2 percent proof (Rp0.2) | Tensile (Rm) |
|---|---|---|
| 20 deg C | ≥550 MPa | 700 to 850 MPa |
| 200 deg C | ≥510 MPa | ~680 MPa |
| 300 deg C | ≥490 MPa | ~660 MPa |
| 400 deg C | ≥470 MPa | ~640 MPa |
| 450 deg C | ≥460 MPa | ~625 MPa |
| 500 deg C | ≥450 MPa | ~605 MPa |
| 550 deg C | ≥420 MPa | ~580 MPa |
Impact Toughness
Charpy V notch impact at 20 deg C minimum 63 J longitudinal to EN 10269. Transverse minimum 40 J on call-out for through-thickness work. Low-temperature qualification at -40 deg C on call-out under VdTUV Wb 350 extended qualification scope.
Modulus of Elasticity
Young's modulus at room temperature: 210 GPa. At 500 deg C: 175 GPa. Shear modulus at room temperature: 80 GPa. Poisson ratio: 0.28. Density: 7.85 g/cm3.
Frequently Asked Questions
Q. What is the room-temperature 0.2 percent proof stress for 21CrMoV5-7?
Minimum 550 MPa to EN 10269 in the Q+T condition. Typical mill datasheet values 600 to 700 MPa, well above the standard floor.
Q. What is the elevated-temperature proof stress at 500 deg C?
Minimum 450 MPa at 500 deg C to EN 10269. Typical mill values 470 to 490 MPa. The proof stress drops smoothly with temperature; the slope is set by the V4C3 carbide-strengthening contribution and the matrix tempering.
Q. Are the EN 10269 mechanical values minimum or typical?
Minimum acceptance floor. The mill datasheet reports the actual heat-lot test results which typically exceed the EN 10269 floor by 10 to 20 percent. The EN 10204 type 3.1 certificate documents both the EN 10269 minimum and the actual heat-lot values.
Q. What is the Young modulus of 21CrMoV5-7?
210 GPa at room temperature; 175 GPa at 500 deg C. The modulus drops with temperature at the rate typical for Cr-Mo-V low-alloy steels.
Related Properties Pages
Drill into 21CrMoV5-7 properties: Chemical Composition · Heat Treatment · Elevated-Temperature Properties · Hardness · Creep-Rupture · Welding Procedure · Machinability. Standards: EN 10269 · vs ASTM A193 B16. Back to the 21CrMoV5-7 Alloy Hub.
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