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R30075 Cobalt vs. ASTM A182 Grade F5a

R30075 cobalt belongs to the cobalt alloys classification, while ASTM A182 grade F5a belongs to the iron alloys. There are 28 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 R30075 cobalt and the bottom bar is ASTM A182 grade F5a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
190
Elongation at Break, % 12
25
Fatigue Strength, MPa 250 to 840
380
Poisson's Ratio 0.29
0.29
Reduction in Area, % 20
56
Shear Modulus, GPa 82 to 98
74
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
710
Tensile Strength: Yield (Proof), MPa 480 to 840
520

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
40
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
9.4

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.1
1.8
Embodied Energy, MJ/kg 110
24
Embodied Water, L/kg 530
69

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
160
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
700
Stiffness to Weight: Axial, points 14 to 17
14
Stiffness to Weight: Bending, points 24 to 25
25
Strength to Weight: Axial, points 26 to 42
25
Strength to Weight: Bending, points 22 to 31
23
Thermal Diffusivity, mm2/s 3.5
11
Thermal Shock Resistance, points 21 to 29
20

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.35
0 to 0.25
Chromium (Cr), % 27 to 30
4.0 to 6.0
Cobalt (Co), % 58.7 to 68
0
Iron (Fe), % 0 to 0.75
91.4 to 95.6
Manganese (Mn), % 0 to 1.0
0 to 0.6
Molybdenum (Mo), % 5.0 to 7.0
0.44 to 0.65
Nickel (Ni), % 0 to 0.5
0 to 0.5
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0 to 0.2
0