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Nickel 686 vs. SAE-AISI 4340 Steel

Nickel 686 belongs to the nickel alloys classification, while SAE-AISI 4340 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is nickel 686 and the bottom bar is SAE-AISI 4340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 51
12 to 22
Fatigue Strength, MPa 410
330 to 740
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 560
430 to 770
Tensile Strength: Ultimate (UTS), MPa 780
690 to 1280
Tensile Strength: Yield (Proof), MPa 350
470 to 1150

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Maximum Temperature: Mechanical, °C 980
430
Melting Completion (Liquidus), °C 1380
1460
Melting Onset (Solidus), °C 1340
1420
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 9.8
44
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 70
3.5
Density, g/cm3 9.0
7.8
Embodied Carbon, kg CO2/kg material 12
1.7
Embodied Energy, MJ/kg 170
22
Embodied Water, L/kg 300
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
79 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 280
590 to 3490
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 24
24 to 45
Strength to Weight: Bending, points 21
22 to 33
Thermal Diffusivity, mm2/s 2.6
12
Thermal Shock Resistance, points 21
20 to 38

Alloy Composition

Carbon (C), % 0 to 0.010
0.38 to 0.43
Chromium (Cr), % 19 to 23
0.7 to 0.9
Iron (Fe), % 0 to 5.0
95.1 to 96.3
Manganese (Mn), % 0 to 0.75
0.6 to 0.8
Molybdenum (Mo), % 15 to 17
0.2 to 0.3
Nickel (Ni), % 49.5 to 63
1.7 to 2.0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 0.080
0.15 to 0.35
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