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ASTM A732 Cast Steel vs. R30008 Cobalt

ASTM A732 cast steel belongs to the iron alloys classification, while R30008 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM A732 cast steel and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 4.0 to 25
1.1 to 73
Fatigue Strength, MPa 230 to 750
320 to 530
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72 to 73
83
Tensile Strength: Ultimate (UTS), MPa 460 to 1470
950 to 1700
Tensile Strength: Yield (Proof), MPa 310 to 1340
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
320
Melting Completion (Liquidus), °C 1440 to 1460
1400
Melting Onset (Solidus), °C 1400 to 1420
1330
Specific Heat Capacity, J/kg-K 470 to 480
450
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0 to 3.8
95
Density, g/cm3 7.8 to 7.9
8.4
Embodied Carbon, kg CO2/kg material 1.4 to 1.7
8.1
Embodied Energy, MJ/kg 19 to 24
110
Embodied Water, L/kg 47 to 54
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 4770
590 to 2720
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 16 to 52
31 to 56
Strength to Weight: Bending, points 17 to 37
25 to 37
Thermal Shock Resistance, points 14 to 43
25 to 44