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ASTM A216 Cast Steel vs. R30012 Cobalt

ASTM A216 cast steel belongs to the iron alloys classification, while R30012 cobalt belongs to the cobalt alloys. There are 27 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 ASTM A216 cast steel and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 25 to 27
1.0
Fatigue Strength, MPa 170 to 230
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
86
Tensile Strength: Ultimate (UTS), MPa 500 to 570
830
Tensile Strength: Yield (Proof), MPa 230 to 310
650

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Melting Completion (Liquidus), °C 1450 to 1460
1470
Melting Onset (Solidus), °C 1410
1280
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 49 to 52
15
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1 to 7.2
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.3
1.8

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 1.4
8.3
Embodied Energy, MJ/kg 18
120
Embodied Water, L/kg 45
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 250
960
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 18 to 20
26
Strength to Weight: Bending, points 18 to 20
22
Thermal Diffusivity, mm2/s 13 to 14
3.8
Thermal Shock Resistance, points 16 to 18
23