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R30816 Cobalt vs. SAE-AISI 1547 Steel

R30816 cobalt belongs to the cobalt alloys classification, while SAE-AISI 1547 steel belongs to the iron 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 R30816 cobalt and the bottom bar is SAE-AISI 1547 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
11 to 17
Fatigue Strength, MPa 250
270 to 430
Poisson's Ratio 0.3
0.29
Reduction in Area, % 22
32 to 40
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 1020
740 to 800
Tensile Strength: Yield (Proof), MPa 460
400 to 690

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1540
1460
Melting Onset (Solidus), °C 1460
1420
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 13
51
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 9.1
7.8
Embodied Carbon, kg CO2/kg material 20
1.4
Embodied Energy, MJ/kg 320
19
Embodied Water, L/kg 440
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
80 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 510
430 to 1280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 31
26 to 28
Strength to Weight: Bending, points 25
23 to 24
Thermal Diffusivity, mm2/s 3.3
14
Thermal Shock Resistance, points 28
23 to 25

Alloy Composition

Carbon (C), % 0.32 to 0.42
0.43 to 0.51
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 40 to 49.8
0
Iron (Fe), % 0 to 5.0
97.8 to 98.2
Manganese (Mn), % 1.0 to 2.0
1.4 to 1.7
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0 to 0.050
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0