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R30006 Cobalt vs. EN 1.4848 Stainless Steel

R30006 cobalt belongs to the cobalt alloys classification, while EN 1.4848 stainless steel 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 27 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 R30006 cobalt and the bottom bar is EN 1.4848 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
9.0
Fatigue Strength, MPa 260
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 85
78
Tensile Strength: Ultimate (UTS), MPa 900
510
Tensile Strength: Yield (Proof), MPa 540
250

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1400
1390
Melting Onset (Solidus), °C 1290
1340
Specific Heat Capacity, J/kg-K 450
490
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
2.3

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 7.8
4.4
Embodied Energy, MJ/kg 110
63
Embodied Water, L/kg 500
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
38
Resilience: Unit (Modulus of Resilience), kJ/m3 670
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 29
18
Strength to Weight: Bending, points 24
18
Thermal Diffusivity, mm2/s 3.9
3.9
Thermal Shock Resistance, points 26
11

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.3 to 0.5
Chromium (Cr), % 27 to 32
24 to 27
Cobalt (Co), % 48.6 to 68.1
0
Iron (Fe), % 0 to 3.0
45.4 to 55.7
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0 to 1.0
0 to 0.5
Nickel (Ni), % 0 to 3.0
19 to 22
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 2.0
1.0 to 2.5
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 4.0 to 6.0
0