Details

mechanical properties of 21CMoV5-7,1.7709 QT

• Tensile strength, Rm = 700 - 850 MPa
• Yield point, Re > 550 MPa
• Elongation, A > 16% Contraction,
• Z > 60% Notch toughness, KV20℃ > 63 J

Softening at 650 °C with slow cooling Slow relief annealing at 530 °C at furnace to at least 200 Normalizing at 950 - 980℃ with cooling in calm air Hardening at 930 - 950℃ in water, 940 - 960℃ in oil Tempering at a temperature of 650 ° c in the air for many hours depending on the size of the material