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R30556 Alloy vs. R30016 Cobalt

R30556 alloy belongs to the iron alloys classification, while R30016 cobalt belongs to the cobalt alloys. They have 49% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R30556 alloy and the bottom bar is R30016 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 45
8.4
Fatigue Strength, MPa 320
290
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
85
Tensile Strength: Ultimate (UTS), MPa 780
1010
Tensile Strength: Yield (Proof), MPa 350
580

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1420
1360
Melting Onset (Solidus), °C 1330
1270
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 11
15
Thermal Expansion, µm/m-K 15
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.0

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.5
Embodied Carbon, kg CO2/kg material 8.7
7.7
Embodied Energy, MJ/kg 130
110
Embodied Water, L/kg 300
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
72
Resilience: Unit (Modulus of Resilience), kJ/m3 290
770
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26
33
Strength to Weight: Bending, points 22
26
Thermal Diffusivity, mm2/s 2.9
3.9
Thermal Shock Resistance, points 18
24

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
0.9 to 1.4
Chromium (Cr), % 21 to 23
28 to 32
Cobalt (Co), % 16 to 21
49.6 to 66.9
Iron (Fe), % 20.4 to 38.2
0 to 3.0
Lanthanum (La), % 0.0050 to 0.1
0
Manganese (Mn), % 0.5 to 2.0
0.5 to 2.0
Molybdenum (Mo), % 2.5 to 4.0
0 to 1.5
Nickel (Ni), % 19 to 22.5
0 to 3.0
Niobium (Nb), % 0 to 0.3
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.2 to 0.8
0.2 to 2.0
Sulfur (S), % 0 to 0.015
0
Tantalum (Ta), % 0.3 to 1.3
0
Tungsten (W), % 2.0 to 3.5
3.5 to 5.5
Zinc (Zn), % 0.0010 to 0.1
0