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Nickel 685 vs. ACI-ASTM CD3MWCuN Steel

Nickel 685 belongs to the nickel alloys classification, while ACI-ASTM CD3MWCuN steel belongs to the iron alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is nickel 685 and the bottom bar is ACI-ASTM CD3MWCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
29
Fatigue Strength, MPa 470
370
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 1250
790
Tensile Strength: Yield (Proof), MPa 850
500

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Maximum Temperature: Mechanical, °C 1000
1100
Melting Completion (Liquidus), °C 1380
1460
Melting Onset (Solidus), °C 1330
1410
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 13
16
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 75
22
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 10
4.2
Embodied Energy, MJ/kg 140
58
Embodied Water, L/kg 340
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
200
Resilience: Unit (Modulus of Resilience), kJ/m3 1820
620
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 42
28
Strength to Weight: Bending, points 31
24
Thermal Diffusivity, mm2/s 3.3
4.2
Thermal Shock Resistance, points 37
22

Alloy Composition

Aluminum (Al), % 1.2 to 1.6
0
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0.030 to 0.1
0 to 0.030
Chromium (Cr), % 18 to 21
24 to 26
Cobalt (Co), % 12 to 15
0
Copper (Cu), % 0 to 0.5
0.5 to 1.0
Iron (Fe), % 0 to 2.0
56.6 to 65.3
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 3.5 to 5.0
3.0 to 4.0
Nickel (Ni), % 49.6 to 62.5
6.5 to 8.5
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.025
Titanium (Ti), % 2.8 to 3.3
0
Tungsten (W), % 0
0.5 to 1.0
Zinc (Zn), % 0.020 to 0.12
0