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Nickel 686 vs. S20161 Stainless Steel

Nickel 686 belongs to the nickel alloys classification, while S20161 stainless steel belongs to the iron alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is nickel 686 and the bottom bar is S20161 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 51
46
Fatigue Strength, MPa 410
360
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 560
690
Tensile Strength: Ultimate (UTS), MPa 780
980
Tensile Strength: Yield (Proof), MPa 350
390

Thermal Properties

Latent Heat of Fusion, J/g 320
330
Maximum Temperature: Mechanical, °C 980
870
Melting Completion (Liquidus), °C 1380
1380
Melting Onset (Solidus), °C 1340
1330
Specific Heat Capacity, J/kg-K 420
490
Thermal Conductivity, W/m-K 9.8
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 70
12
Density, g/cm3 9.0
7.5
Embodied Carbon, kg CO2/kg material 12
2.7
Embodied Energy, MJ/kg 170
39
Embodied Water, L/kg 300
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
360
Resilience: Unit (Modulus of Resilience), kJ/m3 280
390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
26
Strength to Weight: Axial, points 24
36
Strength to Weight: Bending, points 21
29
Thermal Diffusivity, mm2/s 2.6
4.0
Thermal Shock Resistance, points 21
22

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.15
Chromium (Cr), % 19 to 23
15 to 18
Iron (Fe), % 0 to 5.0
65.6 to 73.9
Manganese (Mn), % 0 to 0.75
4.0 to 6.0
Molybdenum (Mo), % 15 to 17
0
Nickel (Ni), % 49.5 to 63
4.0 to 6.0
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.080
3.0 to 4.0
Sulfur (S), % 0 to 0.020
0 to 0.040
Titanium (Ti), % 0.020 to 0.25
0
Tungsten (W), % 3.0 to 4.4
0