21CrMoV5-7 / 1.7709 Steel
Chemical Composition per EN 10269
GRADE | NUMBER | C | Si | Mn | P | S | Cr | Mo | Ni | V | Al |
21CrMoV5-7 | 1.7709 | 0.17-0.25 | ≤ 0.40 | 0.40-0.80 | ≤ 0.025 | ≤ 0.030 | 1.20-1.50 | 0.55-0.80 | ≤ 0.60 | 0.20-0.35 | ≤ 0.030 |
21CrMoV5-7 / 1.7709 Steel Description
Special structural steel. We can supply the 21CrMoV5-7 round bar, steel flat bar, plate, hexagonal steel bar and steel square block. 21CrMoV5-7 steel Round bar can be sawn to your required lengths as one offs or multiple cut pieces. 21CrMoV5-7 Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.
21CrMoV5-7 / 1.7709 Steel Applications
21CrMoV5-7 steel is used for engineering structural, like high tensile shafts, bolts and nuts, gears, pinions and spindles. Locomotive traction with the big gear, supercharger drive gear, pressure vessel, rear axle, gear load of connecting rod and a spring clip,21CrMoV5-7 steel can also be used to under 2000 m deep well of oil drill pipe joint and the fishing tool, and can be used for bending machine mould, etc
21CrMoV5-7 / 1.7709 Steel Mechanical Properties
Rm – Tensile strength (MPa) (+QT) | 700-850 |
Rp0.2 0.2% proof strength (MPa) (+QT) | 550 |
KV – Impact energy (J) (+QT) | +20° 63 |
A – Min. elongation at fracture (%) (+QT) | 16 |
Z – Reduction in cross section on fracture (%) (+QT) | 60 |
Brinell hardness (HBW): (+AC) | 229 |
Brinell hardness (HBW): (+S) | 255 |
21CrMoV5-7 / 1.7709 Steel Available Shapes
Black bar /Flat bar / Square bar /Pipe, /Steel strip, /sheet
Bright – peeled + polishing, centerless grinding
Forged – ring, tube, pipe casing, discs, shaft
Physical properties (average values) at ambient temperature
Modulus of elasticity [103 x N/mm2 ]: 210 Density [g/cm3 ]: 7.80 Continuous Cooling Transformation (CCT)
21CrMoV5-7 / 1.7709 Steel Soft Annealing
Heat to 650-740 degree, cool slowly.
21CrMoV5-7 / 1.7709 Steel Hardening
Harden from a temperature of 900-950 degree followed by oil or air quenching.
21CrMoV5-7 / 1.7709 Steel Tempering
Tempering temperature: 680-740 degree.
21CrMoV5-7 / 1.7709 Steel Forging
Hot forming temperature: 1100-850degree.
Page Contents
- Chemical Composition per EN 10269
- 21CrMoV5-7 / 1.7709 Steel Description
- 21CrMoV5-7 / 1.7709 Steel Applications
- 21CrMoV5-7 / 1.7709 Steel Mechanical Properties
- 21CrMoV5-7 / 1.7709 Steel Available Shapes
- Physical properties (average values) at ambient temperature
- 21CrMoV5-7 / 1.7709 Steel Soft Annealing
- 21CrMoV5-7 / 1.7709 Steel Hardening
- 21CrMoV5-7 / 1.7709 Steel Tempering
- 21CrMoV5-7 / 1.7709 Steel Forging