MakeItFrom.com
Menu (ESC)

R30075 Cobalt vs. Nickel 684

R30075 cobalt belongs to the cobalt alloys classification, while nickel 684 belongs to the nickel alloys. They have a modest 40% of their average alloy composition in common, which, by itself, doesn't mean much. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30075 cobalt and the bottom bar is nickel 684.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210 to 250
200
Elongation at Break, % 12
11
Fatigue Strength, MPa 250 to 840
390
Poisson's Ratio 0.29
0.29
Reduction in Area, % 20
17
Shear Modulus, GPa 82 to 98
76
Tensile Strength: Ultimate (UTS), MPa 780 to 1280
1190
Tensile Strength: Yield (Proof), MPa 480 to 840
800

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1360
1370
Melting Onset (Solidus), °C 1290
1320
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.3
Embodied Carbon, kg CO2/kg material 8.1
10
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 530
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 140
120
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 1410
1610
Stiffness to Weight: Axial, points 14 to 17
13
Stiffness to Weight: Bending, points 24 to 25
23
Strength to Weight: Axial, points 26 to 42
40
Strength to Weight: Bending, points 22 to 31
30
Thermal Shock Resistance, points 21 to 29
34

Alloy Composition

Aluminum (Al), % 0 to 0.1
2.5 to 3.3
Boron (B), % 0 to 0.010
0.0030 to 0.010
Carbon (C), % 0 to 0.35
0 to 0.15
Chromium (Cr), % 27 to 30
15 to 20
Cobalt (Co), % 58.7 to 68
13 to 20
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 0 to 0.75
0 to 4.0
Manganese (Mn), % 0 to 1.0
0 to 0.75
Molybdenum (Mo), % 5.0 to 7.0
3.0 to 5.0
Nickel (Ni), % 0 to 0.5
42.7 to 64
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.020
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.010
0 to 0.015
Titanium (Ti), % 0 to 0.1
2.5 to 3.3
Tungsten (W), % 0 to 0.2
0