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AWS ERNiCrFe-6 vs. R30021 Cobalt

AWS ERNiCrFe-6 belongs to the nickel alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AWS ERNiCrFe-6 and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 34
9.0
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
86
Tensile Strength: Ultimate (UTS), MPa 630
700

Thermal Properties

Latent Heat of Fusion, J/g 310
330
Melting Completion (Liquidus), °C 1370
1350
Melting Onset (Solidus), °C 1320
1190
Specific Heat Capacity, J/kg-K 460
450
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.5
2.1

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.4
Embodied Carbon, kg CO2/kg material 9.8
8.0
Embodied Energy, MJ/kg 140
110
Embodied Water, L/kg 260
520

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 21
23
Strength to Weight: Bending, points 19
21
Thermal Diffusivity, mm2/s 3.3
3.8
Thermal Shock Resistance, points 19
21

Alloy Composition


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Carbon (C), % 0 to 0.080
0.2 to 0.35
Chromium (Cr), % 14 to 17
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 0 to 8.0
0 to 3.0
Manganese (Mn), % 2.0 to 2.7
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 67 to 81.5
2.0 to 3.0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.35
0 to 1.5
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 2.5 to 3.5
0
Residuals, % 0 to 0.5
0