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Nickel 686 vs. ACI-ASTM CD3MWCuN Steel

Nickel 686 belongs to the nickel alloys classification, while ACI-ASTM CD3MWCuN steel belongs to the iron alloys. They have a modest 36% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is nickel 686 and the bottom bar is ACI-ASTM CD3MWCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 51
29
Fatigue Strength, MPa 410
370
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 780
790
Tensile Strength: Yield (Proof), MPa 350
500

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Maximum Temperature: Mechanical, °C 980
1100
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
16
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 70
22
Density, g/cm3 9.0
7.9
Embodied Carbon, kg CO2/kg material 12
4.2
Embodied Energy, MJ/kg 170
58
Embodied Water, L/kg 300
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
200
Resilience: Unit (Modulus of Resilience), kJ/m3 280
620
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24
28
Strength to Weight: Bending, points 21
24
Thermal Diffusivity, mm2/s 2.6
4.2
Thermal Shock Resistance, points 21
22

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.030
Chromium (Cr), % 19 to 23
24 to 26
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 0 to 5.0
56.6 to 65.3
Manganese (Mn), % 0 to 0.75
0 to 1.5
Molybdenum (Mo), % 15 to 17
3.0 to 4.0
Nickel (Ni), % 49.5 to 63
6.5 to 8.5
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.080
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.025
Titanium (Ti), % 0.020 to 0.25
0
Tungsten (W), % 3.0 to 4.4
0.5 to 1.0