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Nickel 686 vs. SAE-AISI A9 Steel

Nickel 686 belongs to the nickel alloys classification, while SAE-AISI A9 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is nickel 686 and the bottom bar is SAE-AISI A9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
74
Tensile Strength: Ultimate (UTS), MPa 780
770 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Melting Completion (Liquidus), °C 1380
1460
Melting Onset (Solidus), °C 1340
1410
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 9.8
35
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 70
7.0
Density, g/cm3 9.0
7.8
Embodied Carbon, kg CO2/kg material 12
4.7
Embodied Energy, MJ/kg 170
70
Embodied Water, L/kg 300
82

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24
28 to 73
Strength to Weight: Bending, points 21
24 to 46
Thermal Diffusivity, mm2/s 2.6
9.6
Thermal Shock Resistance, points 21
25 to 66

Alloy Composition

Carbon (C), % 0 to 0.010
0.45 to 0.55
Chromium (Cr), % 19 to 23
4.8 to 5.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 5.0
87 to 90.5
Manganese (Mn), % 0 to 0.75
0 to 0.5
Molybdenum (Mo), % 15 to 17
1.3 to 1.8
Nickel (Ni), % 49.5 to 63
1.3 to 1.8
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.080
1.0 to 1.2
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
Vanadium (V), % 0
0.8 to 1.4