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Nickel 686 vs. AISI 316H Stainless Steel

Nickel 686 belongs to the nickel alloys classification, while AISI 316H stainless steel belongs to the iron alloys. They have a modest 34% 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 AISI 316H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 51
40
Fatigue Strength, MPa 410
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
78
Shear Strength, MPa 560
400
Tensile Strength: Ultimate (UTS), MPa 780
580
Tensile Strength: Yield (Proof), MPa 350
230

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 980
940
Melting Completion (Liquidus), °C 1380
1450
Melting Onset (Solidus), °C 1340
1400
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 9.8
16
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 70
19
Density, g/cm3 9.0
7.9
Embodied Carbon, kg CO2/kg material 12
3.9
Embodied Energy, MJ/kg 170
53
Embodied Water, L/kg 300
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
190
Resilience: Unit (Modulus of Resilience), kJ/m3 280
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24
21
Strength to Weight: Bending, points 21
20
Thermal Diffusivity, mm2/s 2.6
4.2
Thermal Shock Resistance, points 21
13

Alloy Composition

Carbon (C), % 0 to 0.010
0.040 to 0.1
Chromium (Cr), % 19 to 23
16 to 18
Iron (Fe), % 0 to 5.0
62.1 to 72
Manganese (Mn), % 0 to 0.75
0 to 2.0
Molybdenum (Mo), % 15 to 17
2.0 to 3.0
Nickel (Ni), % 49.5 to 63
10 to 14
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 0.080
0 to 0.75
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0.020 to 0.25
0
Tungsten (W), % 3.0 to 4.4
0