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Nickel 686 vs. SAE-AISI O7 Steel

Nickel 686 belongs to the nickel alloys classification, while SAE-AISI O7 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 O7 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
73
Tensile Strength: Ultimate (UTS), MPa 780
680 to 2110

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1380
1480
Melting Onset (Solidus), °C 1340
1430
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 9.8
41
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 70
6.0
Density, g/cm3 9.0
7.9
Embodied Carbon, kg CO2/kg material 12
2.3
Embodied Energy, MJ/kg 170
33
Embodied Water, L/kg 300
52

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 24
24 to 74
Strength to Weight: Bending, points 21
22 to 46
Thermal Diffusivity, mm2/s 2.6
11
Thermal Shock Resistance, points 21
23 to 70

Alloy Composition

Carbon (C), % 0 to 0.010
1.1 to 1.3
Chromium (Cr), % 19 to 23
0.35 to 0.85
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 5.0
92.9 to 97.6
Manganese (Mn), % 0 to 0.75
0 to 1.0
Molybdenum (Mo), % 15 to 17
0 to 0.3
Nickel (Ni), % 49.5 to 63
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.080
0 to 0.6
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
1.0 to 2.0
Vanadium (V), % 0
0 to 0.4