UNS R30021 Co-Cr-W Alloy
Cobalt Alloys
Property Overview
Density8.4g/cm³
Elastic Modulus220GPa
Tensile Strength700MPa
Yield Strength500MPa
Brinell HardnessUnknown
Maximum Service TemperatureUnknown
Chemical Composition
C
0.2 to 0.35%
CR
26 to 29%
NI
2.0 to 3.0%
MO
4.5 to 6.0%
SI
0 to 1.5%
CO
61.7 to 67.3%
FE
0 to 3.0%
Mechanical
Compressive (Crushing) Strength
1300 MPa
Elastic (Young's, Tensile) Modulus
220 GPa
Elongation at Break
9.0 %
Fatigue Strength
250 MPa
Poisson's Ratio
0.29
Shear Modulus
86 GPa
Tensile Strength: Ultimate (UTS)
700 MPa
Tensile Strength: Yield (Proof)
500 MPa
Hardness
Rockwell C Hardness
32
Physical
Density
8.4 g/cm 3
Thermal
Latent Heat of Fusion
330 J/g
Melting Completion (Liquidus)
1350 °C
Melting Onset (Solidus)
1190 °C
Specific Heat Capacity
450 J/kg-K
Thermal Conductivity
15 W/m-K
Thermal Diffusivity
3.8 mm 2 /s
Thermal Expansion
11 µm/m-K
Thermal Shock Resistance
21 points
Electrical
Electrical Conductivity: Equal Volume
1.9 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.1 % IACS
Calculated
Resilience: Ultimate (Unit Rupture Work)
57 MJ/m 3
Resilience: Unit (Modulus of Resilience)
570 kJ/m 3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
23 points
Strength to Weight: Bending
21 points
Environmental
Embodied Carbon
8.0 kg CO 2 /kg material
Embodied Energy
110 MJ/kg
Embodied Energy
110 MJ/kg 46 x 10 3 BTU/lb
Embodied Water
520 L/kg
Embodied Water
520 L/kg 62 gal/lb
Registered Designations & Aliases
R30021UNS R30021 Co-Cr-W Alloy