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Nickel 686 vs. ACI-ASTM CA40F Steel

Nickel 686 belongs to the nickel alloys classification, while ACI-ASTM CA40F steel belongs to the iron alloys. 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 CA40F steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 51
13
Fatigue Strength, MPa 410
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 780
770
Tensile Strength: Yield (Proof), MPa 350
550

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 980
750
Melting Completion (Liquidus), °C 1380
1430
Melting Onset (Solidus), °C 1340
1390
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 9.8
27
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 70
7.5
Density, g/cm3 9.0
7.7
Embodied Carbon, kg CO2/kg material 12
2.0
Embodied Energy, MJ/kg 170
28
Embodied Water, L/kg 300
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
94
Resilience: Unit (Modulus of Resilience), kJ/m3 280
790
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
7.2
Thermal Shock Resistance, points 21
28

Alloy Composition

Carbon (C), % 0 to 0.010
0.2 to 0.4
Chromium (Cr), % 19 to 23
11.5 to 14
Iron (Fe), % 0 to 5.0
81.6 to 88.3
Manganese (Mn), % 0 to 0.75
0 to 1.0
Molybdenum (Mo), % 15 to 17
0 to 0.5
Nickel (Ni), % 49.5 to 63
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.080
0 to 1.5
Sulfur (S), % 0 to 0.020
0.2 to 0.4
Titanium (Ti), % 0.020 to 0.25
0
Tungsten (W), % 3.0 to 4.4
0