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ASTM A732 Cast Steel vs. R30001 Cobalt

ASTM A732 cast steel belongs to the iron alloys classification, while R30001 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM A732 cast steel and the bottom bar is R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 4.0 to 25
1.0
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72 to 73
86
Tensile Strength: Ultimate (UTS), MPa 460 to 1470
620

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
310
Melting Completion (Liquidus), °C 1440 to 1460
1530
Melting Onset (Solidus), °C 1400 to 1420
1260
Specific Heat Capacity, J/kg-K 470 to 480
430
Thermal Conductivity, W/m-K 39 to 50
15
Thermal Expansion, µm/m-K 13
11

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 7.8 to 7.9
9.0
Embodied Carbon, kg CO2/kg material 1.4 to 1.7
8.9
Embodied Energy, MJ/kg 19 to 24
130
Embodied Water, L/kg 47 to 54
460

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 16 to 52
19
Strength to Weight: Bending, points 17 to 37
18
Thermal Diffusivity, mm2/s 10 to 14
3.7
Thermal Shock Resistance, points 14 to 43
19