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R30556 Alloy vs. EN 2.4964 Cobalt

R30556 alloy belongs to the iron alloys classification, while EN 2.4964 cobalt belongs to the cobalt alloys. They have 54% of their average alloy composition in common. There are 27 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 R30556 alloy and the bottom bar is EN 2.4964 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 45
40
Fatigue Strength, MPa 320
220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 81
86
Tensile Strength: Ultimate (UTS), MPa 780
960
Tensile Strength: Yield (Proof), MPa 350
390

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Melting Completion (Liquidus), °C 1420
1630
Melting Onset (Solidus), °C 1330
1550
Specific Heat Capacity, J/kg-K 450
400
Thermal Conductivity, W/m-K 11
15
Thermal Expansion, µm/m-K 15
12

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.4
9.6
Embodied Carbon, kg CO2/kg material 8.7
9.8
Embodied Energy, MJ/kg 130
140
Embodied Water, L/kg 300
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
310
Resilience: Unit (Modulus of Resilience), kJ/m3 290
340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
21
Strength to Weight: Axial, points 26
28
Strength to Weight: Bending, points 22
23
Thermal Diffusivity, mm2/s 2.9
3.9
Thermal Shock Resistance, points 18
25

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
0
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
0.050 to 0.15
Chromium (Cr), % 21 to 23
19 to 21
Cobalt (Co), % 16 to 21
46.4 to 58
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 to 2.0
Molybdenum (Mo), % 2.5 to 4.0
0
Nickel (Ni), % 19 to 22.5
9.0 to 11
Niobium (Nb), % 0 to 0.3
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0.2 to 0.8
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.015
Tantalum (Ta), % 0.3 to 1.3
0
Tungsten (W), % 2.0 to 3.5
14 to 16
Zinc (Zn), % 0.0010 to 0.1
0