51CrV4 is a chromium-vanadium alloyed spring steel commonly used in the production of various types of springs and high-strength automotive components. Here are its typical material properties:
Carbon (C): 0.47 - 0.55%
Silicon (Si): 0.15 - 0.40%
Manganese (Mn): 0.70 - 1.10%
Phosphorus (P): ≤ 0.025%
Sulfur (S): ≤ 0.025%
Chromium (Cr): 0.90 - 1.20%
Vanadium (V): 0.10 - 0.25%
Tensile Strength: 1100 - 1300 MPa (160,000 - 190,000 psi)
Yield Strength (0.2% Offset): ≥ 900 MPa (130,000 psi)
Elongation: 10 - 12%
Hardness: Typically, after quenching and tempering, hardness values range from 48 to 54 HRC (Rockwell C scale)
Density: 7.85 g/cm³ (0.284 lb/in³)
Modulus of Elasticity (Young's Modulus): 210 GPa (30,000 ksi)
Annealing: Heat to 650-700°C (1200-1290°F), furnace cooling
Hardening: Oil quench from 830-870°C (1525-1600°F)
Tempering: Temper immediately after quenching, typically at 425-650°C (800-1200°F), depending on desired hardness
51CrV4 is commonly used in the production of:
Springs: Including leaf springs for automotive and industrial applications, and coil springs.
High-strength fasteners: Bolts, screws, and other fastening components requiring high tensile strength and resilience.
Automotive components: Such as stabilizers, shafts, crankshafts, and gears where high strength and toughness are required.
This steel grade is valued for its excellent combination of high tensile strength, good toughness, and resilience, making it suitable for demanding applications where components are subjected to significant mechanical stress and fatigue.
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