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AWS E383 vs. R30012 Cobalt

AWS E383 belongs to the iron alloys classification, while R30012 cobalt belongs to the cobalt alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 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 AWS E383 and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 34
1.0
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 80
86
Tensile Strength: Ultimate (UTS), MPa 580
830

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1370
1280
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Density, g/cm3 8.1
8.8
Embodied Carbon, kg CO2/kg material 6.4
8.3
Embodied Energy, MJ/kg 89
120
Embodied Water, L/kg 240
480

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 20
26
Strength to Weight: Bending, points 19
22
Thermal Diffusivity, mm2/s 3.1
3.8
Thermal Shock Resistance, points 15
23

Alloy Composition

Carbon (C), % 0 to 0.030
1.4 to 2.0
Chromium (Cr), % 26.5 to 29
27 to 32
Cobalt (Co), % 0
47.5 to 64.1
Copper (Cu), % 0.6 to 1.5
0
Iron (Fe), % 28.8 to 39.2
0 to 3.0
Manganese (Mn), % 0.5 to 2.5
0
Molybdenum (Mo), % 3.2 to 4.2
0 to 1.0
Nickel (Ni), % 30 to 33
0 to 3.0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.9
0 to 2.0
Sulfur (S), % 0 to 0.020
0
Tungsten (W), % 0
7.5 to 9.5