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ASTM A182 Grade F6b vs. R31539 Cobalt

ASTM A182 grade F6b belongs to the iron alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 28 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 A182 grade F6b and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 18
13 to 22
Fatigue Strength, MPa 440
310 to 480
Poisson's Ratio 0.28
0.29
Reduction in Area, % 51
13 to 23
Shear Modulus, GPa 76
86
Tensile Strength: Ultimate (UTS), MPa 850
1000 to 1340
Tensile Strength: Yield (Proof), MPa 710
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Melting Completion (Liquidus), °C 1450
1360
Melting Onset (Solidus), °C 1400
1290
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 25
13
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 2.2
8.2
Embodied Energy, MJ/kg 30
110
Embodied Water, L/kg 100
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
780 to 2000
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 30
33 to 44
Strength to Weight: Bending, points 26
27 to 32
Thermal Diffusivity, mm2/s 6.7
3.5
Thermal Shock Resistance, points 31
24 to 32

Alloy Composition

Aluminum (Al), % 0
0.3 to 1.0
Carbon (C), % 0 to 0.15
0 to 0.14
Chromium (Cr), % 11.5 to 13.5
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 81.2 to 87.1
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.4 to 0.6
5.0 to 7.0
Nickel (Ni), % 1.0 to 2.0
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0