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Nickel 686 vs. ACI-ASTM CA6N Steel

Nickel 686 belongs to the nickel alloys classification, while ACI-ASTM CA6N steel belongs to the iron alloys. They have a modest 21% 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 (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 CA6N steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 51
17
Fatigue Strength, MPa 410
640
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 780
1080
Tensile Strength: Yield (Proof), MPa 350
1060

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 980
740
Melting Completion (Liquidus), °C 1380
1440
Melting Onset (Solidus), °C 1340
1400
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 9.8
23
Thermal Expansion, µm/m-K 12
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 70
11
Density, g/cm3 9.0
7.8
Embodied Carbon, kg CO2/kg material 12
2.5
Embodied Energy, MJ/kg 170
35
Embodied Water, L/kg 300
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
180
Resilience: Unit (Modulus of Resilience), kJ/m3 280
2900
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24
38
Strength to Weight: Bending, points 21
30
Thermal Diffusivity, mm2/s 2.6
6.1
Thermal Shock Resistance, points 21
40

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.060
Chromium (Cr), % 19 to 23
10.5 to 12.5
Iron (Fe), % 0 to 5.0
77.9 to 83.5
Manganese (Mn), % 0 to 0.75
0 to 0.5
Molybdenum (Mo), % 15 to 17
0
Nickel (Ni), % 49.5 to 63
6.0 to 8.0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 0.080
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.020
Titanium (Ti), % 0.020 to 0.25
0
Tungsten (W), % 3.0 to 4.4
0