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R30816 Cobalt vs. EN 1.4107 Stainless Steel

R30816 cobalt belongs to the cobalt alloys classification, while EN 1.4107 stainless steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is EN 1.4107 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
18 to 21
Fatigue Strength, MPa 250
260 to 350
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 81
76
Tensile Strength: Ultimate (UTS), MPa 1020
620 to 700
Tensile Strength: Yield (Proof), MPa 460
400 to 570

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Melting Completion (Liquidus), °C 1540
1450
Melting Onset (Solidus), °C 1460
1410
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 13
27
Thermal Expansion, µm/m-K 12
10

Otherwise Unclassified Properties

Density, g/cm3 9.1
7.8
Embodied Carbon, kg CO2/kg material 20
2.1
Embodied Energy, MJ/kg 320
30
Embodied Water, L/kg 440
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 510
420 to 840
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 31
22 to 25
Strength to Weight: Bending, points 25
21 to 22
Thermal Diffusivity, mm2/s 3.3
7.2
Thermal Shock Resistance, points 28
22 to 25

Alloy Composition

Carbon (C), % 0.32 to 0.42
0 to 0.1
Chromium (Cr), % 19 to 21
11.5 to 12.5
Cobalt (Co), % 40 to 49.8
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 5.0
83.8 to 87.2
Manganese (Mn), % 1.0 to 2.0
0.5 to 0.8
Molybdenum (Mo), % 3.5 to 4.5
0 to 0.5
Nickel (Ni), % 19 to 21
0.8 to 1.5
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 0.4
Sulfur (S), % 0 to 0.030
0 to 0.020
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0
Vanadium (V), % 0
0 to 0.080