Cobalt-Based Elastic Alloy
3J21
Specifications
-
Plate / Sheet
- Thickness: 0.1mm-5.0mm
- Width: 50mm-1000mm
- Length: 500mm-3000mm
-
Strip
- Thickness: 0.02mm-1.5mm
- Width: 3mm-500mm
- Delivery Forms: Bright shiny, cold rolled or hot rolled
-
Rod
- Diameter: Ø5mm-Ø80mm
- Length: 100mm-2000mm
-
Wire
- Diameter: Ø0.03mm-Ø5mm
- Delivery Forms: Bright shiny, supplied in spools
-
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 |