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Grade CW6MC Nickel vs. Nickel 686

Both grade CW6MC nickel and nickel 686 are nickel alloys. They have 89% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is grade CW6MC nickel and the bottom bar is nickel 686.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 28
51
Fatigue Strength, MPa 210
410
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 540
780
Tensile Strength: Yield (Proof), MPa 310
350

Thermal Properties

Latent Heat of Fusion, J/g 330
320
Maximum Temperature: Mechanical, °C 980
980
Melting Completion (Liquidus), °C 1480
1380
Melting Onset (Solidus), °C 1430
1340
Specific Heat Capacity, J/kg-K 440
420
Thermal Conductivity, W/m-K 11
9.8
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 80
70
Density, g/cm3 8.6
9.0
Embodied Carbon, kg CO2/kg material 14
12
Embodied Energy, MJ/kg 200
170
Embodied Water, L/kg 290
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
320
Resilience: Unit (Modulus of Resilience), kJ/m3 240
280
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
22
Strength to Weight: Axial, points 18
24
Strength to Weight: Bending, points 17
21
Thermal Diffusivity, mm2/s 2.8
2.6
Thermal Shock Resistance, points 15
21

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.010
Chromium (Cr), % 20 to 23
19 to 23
Iron (Fe), % 0 to 5.0
0 to 5.0
Manganese (Mn), % 0 to 1.0
0 to 0.75
Molybdenum (Mo), % 8.0 to 10
15 to 17
Nickel (Ni), % 55.4 to 68.9
49.5 to 63
Niobium (Nb), % 3.2 to 4.5
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.080
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0.020 to 0.25
Tungsten (W), % 0
3.0 to 4.4