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AWS E347 vs. R30012 Cobalt

AWS E347 belongs to the iron alloys classification, while R30012 cobalt belongs to the cobalt alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 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 AWS E347 and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 34
1.0
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
86
Tensile Strength: Ultimate (UTS), MPa 580
830

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1380
1280
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 14
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
1.8

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 3.7
8.3
Embodied Energy, MJ/kg 53
120
Embodied Water, L/kg 150
480

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21
26
Strength to Weight: Bending, points 20
22
Thermal Diffusivity, mm2/s 4.2
3.8
Thermal Shock Resistance, points 15
23

Alloy Composition

Carbon (C), % 0 to 0.080
1.4 to 2.0
Chromium (Cr), % 18 to 21
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 61.9 to 72.5
0 to 3.0
Manganese (Mn), % 0.5 to 2.5
0
Molybdenum (Mo), % 0 to 0.75
0 to 1.0
Nickel (Ni), % 9.0 to 11
0 to 3.0
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0
Tungsten (W), % 0
7.5 to 9.5