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R31539 Cobalt vs. ASTM A299 Steel

R31539 cobalt belongs to the cobalt alloys classification, while ASTM A299 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is ASTM A299 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 13 to 22
21 to 22
Fatigue Strength, MPa 310 to 480
230 to 250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 86
73
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
590 to 620
Tensile Strength: Yield (Proof), MPa 590 to 940
330 to 360

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
51
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
8.2

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.2
1.4
Embodied Energy, MJ/kg 110
19
Embodied Water, L/kg 530
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
110
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
290 to 350
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33 to 44
21 to 22
Strength to Weight: Bending, points 27 to 32
20 to 21
Thermal Diffusivity, mm2/s 3.5
14
Thermal Shock Resistance, points 24 to 32
17 to 18

Comparable Variants