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ASTM A369 Grade FP91 vs. R30012 Cobalt

ASTM A369 grade FP91 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 (7, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP91 and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 19
1.0
Fatigue Strength, MPa 320
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 670
830
Tensile Strength: Yield (Proof), MPa 460
650

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1280
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 26
15
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 10
1.8

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 2.6
8.3
Embodied Energy, MJ/kg 37
120
Embodied Water, L/kg 88
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 560
960
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 24
26
Strength to Weight: Bending, points 22
22
Thermal Diffusivity, mm2/s 6.9
3.8
Thermal Shock Resistance, points 18
23

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
1.4 to 2.0
Chromium (Cr), % 8.0 to 9.5
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Iron (Fe), % 87.3 to 90.3
0 to 3.0
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.85 to 1.1
0 to 1.0
Nickel (Ni), % 0 to 0.4
0 to 3.0
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0.2 to 0.5
0 to 2.0
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0
7.5 to 9.5
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0