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R30016 Cobalt vs. ASTM A372 Grade E Steel

R30016 cobalt belongs to the cobalt alloys classification, while ASTM A372 grade E steel belongs to the iron alloys. There are 27 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 R30016 cobalt and the bottom bar is ASTM A372 grade E steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 8.4
20 to 22
Fatigue Strength, MPa 290
310 to 380
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 1010
650 to 910
Tensile Strength: Yield (Proof), MPa 580
430 to 550

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1270
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
44
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
8.3

Otherwise Unclassified Properties

Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 7.7
1.5
Embodied Energy, MJ/kg 110
20
Embodied Water, L/kg 500
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 72
130 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 770
500 to 810
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33
23 to 32
Strength to Weight: Bending, points 26
21 to 27
Thermal Diffusivity, mm2/s 3.9
12
Thermal Shock Resistance, points 24
19 to 27

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.25 to 0.35
Chromium (Cr), % 28 to 32
0.8 to 1.2
Cobalt (Co), % 49.6 to 66.9
0
Iron (Fe), % 0 to 3.0
97 to 98.3
Manganese (Mn), % 0.5 to 2.0
0.4 to 0.9
Molybdenum (Mo), % 0 to 1.5
0.15 to 0.25
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0.2 to 2.0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.010
Tungsten (W), % 3.5 to 5.5
0