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Nickel 685 vs. Nickel 718

Both nickel 685 and nickel 718 are nickel alloys. They have 78% of their average alloy composition in common. There are 29 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 685 and the bottom bar is nickel 718.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
12 to 50
Fatigue Strength, MPa 470
460 to 760
Poisson's Ratio 0.29
0.29
Reduction in Area, % 20
34 to 64
Shear Modulus, GPa 77
75
Shear Strength, MPa 770
660 to 950
Tensile Strength: Ultimate (UTS), MPa 1250
930 to 1530
Tensile Strength: Yield (Proof), MPa 850
510 to 1330

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Maximum Temperature: Mechanical, °C 1000
980
Melting Completion (Liquidus), °C 1380
1340
Melting Onset (Solidus), °C 1330
1260
Specific Heat Capacity, J/kg-K 460
450
Thermal Conductivity, W/m-K 13
11
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 75
75
Density, g/cm3 8.4
8.3
Embodied Carbon, kg CO2/kg material 10
13
Embodied Energy, MJ/kg 140
190
Embodied Water, L/kg 340
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
140 to 390
Resilience: Unit (Modulus of Resilience), kJ/m3 1820
660 to 4560
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 42
31 to 51
Strength to Weight: Bending, points 31
25 to 35
Thermal Diffusivity, mm2/s 3.3
3.0
Thermal Shock Resistance, points 37
27 to 44

Alloy Composition

Aluminum (Al), % 1.2 to 1.6
0.2 to 0.8
Boron (B), % 0.0030 to 0.010
0 to 0.0060
Carbon (C), % 0.030 to 0.1
0 to 0.080
Chromium (Cr), % 18 to 21
17 to 21
Cobalt (Co), % 12 to 15
0 to 1.0
Copper (Cu), % 0 to 0.5
0 to 0.3
Iron (Fe), % 0 to 2.0
11.1 to 24.6
Manganese (Mn), % 0 to 1.0
0 to 0.35
Molybdenum (Mo), % 3.5 to 5.0
2.8 to 3.3
Nickel (Ni), % 49.6 to 62.5
50 to 55
Niobium (Nb), % 0
4.8 to 5.5
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0 to 0.75
0 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 2.8 to 3.3
0.65 to 1.2
Zinc (Zn), % 0.020 to 0.12
0