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R30006 Cobalt vs. AWS ER70S-A1

R30006 cobalt belongs to the cobalt alloys classification, while AWS ER70S-A1 belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is AWS ER70S-A1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 1.0
22
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 900
590
Tensile Strength: Yield (Proof), MPa 540
450

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
50
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
8.3

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 7.8
1.5
Embodied Energy, MJ/kg 110
20
Embodied Water, L/kg 500
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
120
Resilience: Unit (Modulus of Resilience), kJ/m3 670
540
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 29
21
Strength to Weight: Bending, points 24
20
Thermal Diffusivity, mm2/s 3.9
14
Thermal Shock Resistance, points 26
17

Alloy Composition


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Carbon (C), % 0.9 to 1.4
0 to 0.12
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
0 to 0.35
Iron (Fe), % 0 to 3.0
96.1 to 99.3
Manganese (Mn), % 0
0 to 1.3
Molybdenum (Mo), % 0 to 1.0
0.4 to 0.65
Nickel (Ni), % 0 to 3.0
0 to 0.2
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 2.0
0.3 to 0.7
Sulfur (S), % 0
0 to 0.025
Tungsten (W), % 4.0 to 6.0
0
Residuals, % 0
0 to 0.5