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EN 1.4606 Stainless Steel vs. R31539 Cobalt

EN 1.4606 stainless steel belongs to the iron alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.4606 stainless steel and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 23 to 39
13 to 22
Fatigue Strength, MPa 240 to 420
310 to 480
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 600 to 1020
1000 to 1340
Tensile Strength: Yield (Proof), MPa 280 to 630
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1430
1360
Melting Onset (Solidus), °C 1380
1290
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 14
13
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.2
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 6.0
8.2
Embodied Energy, MJ/kg 87
110
Embodied Water, L/kg 170
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 200
140 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 200 to 1010
780 to 2000
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 36
33 to 44
Strength to Weight: Bending, points 20 to 28
27 to 32
Thermal Diffusivity, mm2/s 3.7
3.5
Thermal Shock Resistance, points 21 to 35
24 to 32

Alloy Composition

Aluminum (Al), % 0 to 0.35
0.3 to 1.0
Boron (B), % 0.0010 to 0.010
0
Carbon (C), % 0 to 0.080
0 to 0.14
Chromium (Cr), % 13 to 16
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Iron (Fe), % 49.2 to 59
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 1.0 to 1.5
5.0 to 7.0
Nickel (Ni), % 24 to 27
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 1.9 to 2.3
0
Vanadium (V), % 0.1 to 0.5
0