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AWS E383 vs. R30816 Cobalt

AWS E383 belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. They have 48% of their average alloy composition in common. There are 21 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 E383 and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 34
23
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 80
81
Tensile Strength: Ultimate (UTS), MPa 580
1020

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1420
1540
Melting Onset (Solidus), °C 1370
1460
Specific Heat Capacity, J/kg-K 470
420
Thermal Conductivity, W/m-K 12
13
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Density, g/cm3 8.1
9.1
Embodied Carbon, kg CO2/kg material 6.4
20
Embodied Energy, MJ/kg 89
320
Embodied Water, L/kg 240
440

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 20
31
Strength to Weight: Bending, points 19
25
Thermal Diffusivity, mm2/s 3.1
3.3
Thermal Shock Resistance, points 15
28

Alloy Composition

Carbon (C), % 0 to 0.030
0.32 to 0.42
Chromium (Cr), % 26.5 to 29
19 to 21
Cobalt (Co), % 0
40 to 49.8
Copper (Cu), % 0.6 to 1.5
0
Iron (Fe), % 28.8 to 39.2
0 to 5.0
Manganese (Mn), % 0.5 to 2.5
1.0 to 2.0
Molybdenum (Mo), % 3.2 to 4.2
3.5 to 4.5
Nickel (Ni), % 30 to 33
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.9
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tungsten (W), % 0
3.5 to 4.5