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AWS E630 vs. R30155 Cobalt

Both AWS E630 and R30155 cobalt are iron alloys. They have 53% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is AWS E630 and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 8.0
34
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
81
Tensile Strength: Ultimate (UTS), MPa 1040
850

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 17
12
Thermal Expansion, µm/m-K 14
14

Otherwise Unclassified Properties

Base Metal Price, % relative 14
80
Density, g/cm3 7.8
8.5
Embodied Carbon, kg CO2/kg material 2.8
9.7
Embodied Energy, MJ/kg 40
150
Embodied Water, L/kg 140
300

Common Calculations

PREN (Pitting Resistance) 18
37
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 37
28
Strength to Weight: Bending, points 29
24
Thermal Diffusivity, mm2/s 4.5
3.2
Thermal Shock Resistance, points 28
21

Alloy Composition

Carbon (C), % 0 to 0.050
0.080 to 0.16
Chromium (Cr), % 16 to 16.8
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 3.3 to 4.0
0
Iron (Fe), % 71.6 to 75.9
24.3 to 36.2
Manganese (Mn), % 0.25 to 0.75
1.0 to 2.0
Molybdenum (Mo), % 0 to 0.75
2.5 to 3.5
Nickel (Ni), % 4.5 to 5.0
19 to 21
Niobium (Nb), % 0.15 to 0.3
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0