MakeItFrom.com
Menu (ESC)

R30816 Cobalt vs. AWS E16-8-2

R30816 cobalt belongs to the cobalt alloys classification, while AWS E16-8-2 belongs to the iron alloys. They have a modest 30% 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 R30816 cobalt and the bottom bar is AWS E16-8-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 23
40
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 81
77
Tensile Strength: Ultimate (UTS), MPa 1020
620

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Melting Completion (Liquidus), °C 1540
1440
Melting Onset (Solidus), °C 1460
1400
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 13
16
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Density, g/cm3 9.1
7.9
Embodied Carbon, kg CO2/kg material 20
3.2
Embodied Energy, MJ/kg 320
45
Embodied Water, L/kg 440
140

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 31
22
Strength to Weight: Bending, points 25
20
Thermal Diffusivity, mm2/s 3.3
4.2
Thermal Shock Resistance, points 28
16

Alloy Composition

Carbon (C), % 0.32 to 0.42
0 to 0.1
Chromium (Cr), % 19 to 21
14.5 to 16.5
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 0 to 5.0
68 to 76.5
Manganese (Mn), % 1.0 to 2.0
0.5 to 2.5
Molybdenum (Mo), % 3.5 to 4.5
1.0 to 2.0
Nickel (Ni), % 19 to 21
7.5 to 9.5
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0