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R30816 Cobalt vs. ASTM A369 Grade FP12

R30816 cobalt belongs to the cobalt alloys classification, while ASTM A369 grade FP12 belongs to the iron alloys. There are 26 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 R30816 cobalt and the bottom bar is ASTM A369 grade FP12.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
140
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
20
Fatigue Strength, MPa 250
170
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 81
73
Tensile Strength: Ultimate (UTS), MPa 1020
470
Tensile Strength: Yield (Proof), MPa 460
250

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1540
1470
Melting Onset (Solidus), °C 1460
1430
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 13
45
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 9.1
7.9
Embodied Carbon, kg CO2/kg material 20
1.6
Embodied Energy, MJ/kg 320
21
Embodied Water, L/kg 440
52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
81
Resilience: Unit (Modulus of Resilience), kJ/m3 510
160
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 31
17
Strength to Weight: Bending, points 25
17
Thermal Diffusivity, mm2/s 3.3
12
Thermal Shock Resistance, points 28
14

Alloy Composition

Carbon (C), % 0.32 to 0.42
0.050 to 0.15
Chromium (Cr), % 19 to 21
0.8 to 1.3
Cobalt (Co), % 40 to 49.8
0
Iron (Fe), % 0 to 5.0
96.8 to 98.4
Manganese (Mn), % 1.0 to 2.0
0.3 to 0.61
Molybdenum (Mo), % 3.5 to 4.5
0.44 to 0.65
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0