Cobalt-Based Elastic Alloy

3J21

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Specifications
  • Plate / Sheet
    Plate / Sheet
    Thickness: 0.1mm-5.0mm
    Width: 50mm-1000mm
    Length: 500mm-3000mm
  • Strip
    Strip
    Thickness: 0.02mm-1.5mm
    Width: 3mm-500mm
    Delivery Forms: Bright shiny, cold rolled or hot rolled
  • Rod
    Rod
    Diameter: Ø5mm-Ø80mm
    Length: 100mm-2000mm
  • Wire
    Wire
    Diameter: Ø0.03mm-Ø5mm
    Delivery Forms: Bright shiny, supplied in spools
  • Tube
    Tube
    Outer Diameter: Ø3mm-Ø100mm
    Wall Thickness: 0.5mm-10mm
    Length: 100mm-6000mm
Chemical Composition
Carbon (C) Sulfur (S) Phosphorus (P) Manganese (Mn) Silicon (Si) Nickel (Ni) Chromium (Cr) Titanium (Ti) Aluminum (Al) Cobalt (Co) Molybdenum (Mo) Tungsten (W) Iron (Fe) Other Elements
Not greater than
0.07-.12 0.015 0.015 1.70-2.30 0.6 14.0-16.0 19.0-21.0 - - 39-41 6.5-7.5 - Rest -
Physical & Mechanical Properties
Alloy Grade Density (g/cm³) Electrical Resistivity (10⁻⁶ Ω·cm) Thermal Conductivity (W/m·K) Modulus of Elasticity (GPa) Yield Strength (MPa) Tensile Strength (MPa) Elongation at Break (%) Elastic Limit (MPa) Fatigue Life (cycles) Working Temperature Range (°C) Temperature Coefficient
3J21 (High Elasticity) 8.1 80 11 144 800 1000 10 800 >10⁷ -60-200 Extremely low temperature coefficient of elasticity
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