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R31539 Cobalt vs. EN 1.4525 Stainless Steel

R31539 cobalt belongs to the cobalt alloys classification, while EN 1.4525 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is EN 1.4525 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 13 to 22
5.6 to 13
Fatigue Strength, MPa 310 to 480
480 to 540
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
76
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
1030 to 1250
Tensile Strength: Yield (Proof), MPa 590 to 940
840 to 1120

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1360
1430
Melting Onset (Solidus), °C 1290
1390
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 13
18
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
2.6

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.2
2.8
Embodied Energy, MJ/kg 110
39
Embodied Water, L/kg 530
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
68 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
1820 to 3230
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33 to 44
36 to 45
Strength to Weight: Bending, points 27 to 32
29 to 33
Thermal Diffusivity, mm2/s 3.5
4.7
Thermal Shock Resistance, points 24 to 32
34 to 41

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
0 to 0.070
Chromium (Cr), % 26 to 30
15 to 17
Cobalt (Co), % 57.7 to 68.7
0
Copper (Cu), % 0
2.5 to 4.0
Iron (Fe), % 0 to 0.75
70.4 to 79
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
0 to 0.8
Nickel (Ni), % 0 to 1.0
3.5 to 5.5
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0 to 0.25
0 to 0.050
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0
0 to 0.025

Comparable Variants