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Nickel 686 vs. ACI-ASTM CN3MN Steel

Nickel 686 belongs to the nickel alloys classification, while ACI-ASTM CN3MN steel belongs to the iron alloys. They have 55% of their average alloy composition in common. There are 29 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 ACI-ASTM CN3MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 51
39
Fatigue Strength, MPa 410
250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 780
620
Tensile Strength: Yield (Proof), MPa 350
300

Thermal Properties

Latent Heat of Fusion, J/g 320
310
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
460
Thermal Conductivity, W/m-K 9.8
13
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 70
33
Density, g/cm3 9.0
8.1
Embodied Carbon, kg CO2/kg material 12
6.2
Embodied Energy, MJ/kg 170
84
Embodied Water, L/kg 300
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
200
Resilience: Unit (Modulus of Resilience), kJ/m3 280
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 24
21
Strength to Weight: Bending, points 21
20
Thermal Diffusivity, mm2/s 2.6
3.4
Thermal Shock Resistance, points 21
14

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.030
Chromium (Cr), % 19 to 23
20 to 22
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 0 to 5.0
41.4 to 50.3
Manganese (Mn), % 0 to 0.75
0 to 2.0
Molybdenum (Mo), % 15 to 17
6.0 to 7.0
Nickel (Ni), % 49.5 to 63
23.5 to 25.5
Nitrogen (N), % 0
0.18 to 0.26
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 0.010
Titanium (Ti), % 0.020 to 0.25
0
Tungsten (W), % 3.0 to 4.4
0