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EN 1.4020 Stainless Steel vs. R31537 Cobalt

EN 1.4020 stainless steel belongs to the iron alloys classification, while R31537 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is EN 1.4020 stainless steel and the bottom bar is R31537 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 13 to 34
14 to 23
Fatigue Strength, MPa 340 to 540
310 to 480
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
87
Tensile Strength: Ultimate (UTS), MPa 770 to 1130
1000 to 1340
Tensile Strength: Yield (Proof), MPa 430 to 950
590 to 940

Thermal Properties

Latent Heat of Fusion, J/g 280
320
Melting Completion (Liquidus), °C 1390
1360
Melting Onset (Solidus), °C 1350
1290
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 17
13

Otherwise Unclassified Properties

Density, g/cm3 7.6
8.4
Embodied Carbon, kg CO2/kg material 2.5
8.1
Embodied Energy, MJ/kg 37
110
Embodied Water, L/kg 150
530

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 220
140 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 2290
780 to 1990
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 41
33 to 44
Strength to Weight: Bending, points 25 to 32
26 to 32
Thermal Shock Resistance, points 16 to 23
24 to 32

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.14
Chromium (Cr), % 16.5 to 19
26 to 30
Cobalt (Co), % 0
58.9 to 69
Iron (Fe), % 62.8 to 71.8
0 to 0.75
Manganese (Mn), % 11 to 14
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0.5 to 2.5
0 to 1.0
Nitrogen (N), % 0.2 to 0.45
0 to 0.25
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0