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R30556 Alloy vs. R30006 Cobalt

R30556 alloy belongs to the iron alloys classification, while R30006 cobalt belongs to the cobalt alloys. They have 47% of their average alloy composition in common. There are 27 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 R30556 alloy and the bottom bar is R30006 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 45
1.0
Fatigue Strength, MPa 320
260
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
85
Tensile Strength: Ultimate (UTS), MPa 780
900
Tensile Strength: Yield (Proof), MPa 350
540

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1330
1290
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 11
15
Thermal Expansion, µm/m-K 15
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
1.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
1.7

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.6
Embodied Carbon, kg CO2/kg material 8.7
7.8
Embodied Energy, MJ/kg 130
110
Embodied Water, L/kg 300
500

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
7.8
Resilience: Unit (Modulus of Resilience), kJ/m3 290
670
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 26
29
Strength to Weight: Bending, points 22
24
Thermal Diffusivity, mm2/s 2.9
3.9
Thermal Shock Resistance, points 18
26

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
27 to 32
Cobalt (Co), % 16 to 21
48.6 to 68.1
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
Molybdenum (Mo), % 2.5 to 4.0
0 to 1.0
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 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
4.0 to 6.0
Zinc (Zn), % 0.0010 to 0.1
0