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R30016 Cobalt vs. EN 1.4729 Stainless Steel

R30016 cobalt belongs to the cobalt alloys classification, while EN 1.4729 stainless steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is R30016 cobalt and the bottom bar is EN 1.4729 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 8.4
15
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 85
75

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Melting Completion (Liquidus), °C 1360
1420
Melting Onset (Solidus), °C 1270
1380
Specific Heat Capacity, J/kg-K 450
490
Thermal Conductivity, W/m-K 15
24
Thermal Expansion, µm/m-K 14
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
3.3

Otherwise Unclassified Properties

Density, g/cm3 8.5
7.6
Embodied Carbon, kg CO2/kg material 7.7
2.1
Embodied Energy, MJ/kg 110
29
Embodied Water, L/kg 500
100

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Thermal Diffusivity, mm2/s 3.9
6.5

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.3 to 0.5
Chromium (Cr), % 28 to 32
12 to 14
Cobalt (Co), % 49.6 to 66.9
0
Iron (Fe), % 0 to 3.0
80.4 to 86.7
Manganese (Mn), % 0.5 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 1.5
0 to 0.5
Nickel (Ni), % 0 to 3.0
0 to 1.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.2 to 2.0
1.0 to 2.5
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 3.5 to 5.5
0