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Nickel 686 vs. AISI 442 Stainless Steel

Nickel 686 belongs to the nickel alloys classification, while AISI 442 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 (4, in this case) are not shown.

For each property being compared, the top bar is nickel 686 and the bottom bar is AISI 442 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 51
23
Fatigue Strength, MPa 410
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 77
78
Shear Strength, MPa 560
370
Tensile Strength: Ultimate (UTS), MPa 780
580
Tensile Strength: Yield (Proof), MPa 350
310

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 980
960
Melting Completion (Liquidus), °C 1380
1430
Melting Onset (Solidus), °C 1340
1390
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 9.8
22
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 70
10
Density, g/cm3 9.0
7.7
Embodied Carbon, kg CO2/kg material 12
2.3
Embodied Energy, MJ/kg 170
32
Embodied Water, L/kg 300
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
110
Resilience: Unit (Modulus of Resilience), kJ/m3 280
250
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
5.8
Thermal Shock Resistance, points 21
20

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.2
Chromium (Cr), % 19 to 23
18 to 23
Iron (Fe), % 0 to 5.0
74.1 to 82
Manganese (Mn), % 0 to 0.75
0 to 1.0
Molybdenum (Mo), % 15 to 17
0
Nickel (Ni), % 49.5 to 63
0 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.080
0 to 1.0
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