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Nickel 686 vs. ACI-ASTM CN7MS Steel

Nickel 686 belongs to the nickel alloys classification, while ACI-ASTM CN7MS steel belongs to the iron alloys. They have 48% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is nickel 686 and the bottom bar is ACI-ASTM CN7MS steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 51
39
Fatigue Strength, MPa 410
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 780
540
Tensile Strength: Yield (Proof), MPa 350
230

Thermal Properties

Latent Heat of Fusion, J/g 320
340
Maximum Temperature: Mechanical, °C 980
1040
Melting Completion (Liquidus), °C 1380
1400
Melting Onset (Solidus), °C 1340
1350
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 9.8
12
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 70
28
Density, g/cm3 9.0
7.9
Embodied Carbon, kg CO2/kg material 12
5.1
Embodied Energy, MJ/kg 170
71
Embodied Water, L/kg 300
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
170
Resilience: Unit (Modulus of Resilience), kJ/m3 280
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24
19
Strength to Weight: Bending, points 21
19
Thermal Diffusivity, mm2/s 2.6
3.2
Thermal Shock Resistance, points 21
13

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.070
Chromium (Cr), % 19 to 23
18 to 20
Copper (Cu), % 0
1.5 to 2.0
Iron (Fe), % 0 to 5.0
45.4 to 53.5
Manganese (Mn), % 0 to 0.75
0 to 1.0
Molybdenum (Mo), % 15 to 17
2.5 to 3.0
Nickel (Ni), % 49.5 to 63
22 to 25
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.080
2.5 to 3.5
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
0