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R30605 Cobalt vs. ASTM A732 Cast Steel

R30605 cobalt belongs to the cobalt alloys classification, while ASTM A732 cast steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R30605 cobalt and the bottom bar is ASTM A732 cast steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
4.0 to 25
Fatigue Strength, MPa 260 to 590
230 to 750
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
72 to 73
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
460 to 1470
Tensile Strength: Yield (Proof), MPa 470 to 1600
310 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 290
250 to 260
Melting Completion (Liquidus), °C 1410
1440 to 1460
Melting Onset (Solidus), °C 1330
1400 to 1420
Specific Heat Capacity, J/kg-K 410
470 to 480
Thermal Conductivity, W/m-K 9.6
39 to 50
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.1 to 7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.2 to 8.9

Otherwise Unclassified Properties

Density, g/cm3 9.6
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 9.8
1.4 to 1.7
Embodied Energy, MJ/kg 140
19 to 24
Embodied Water, L/kg 450
47 to 54

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 33 to 55
16 to 52
Strength to Weight: Bending, points 25 to 36
17 to 37
Thermal Diffusivity, mm2/s 2.5
10 to 14
Thermal Shock Resistance, points 31 to 52
14 to 43