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Nickel 686 vs. AISI 204 Stainless Steel

Nickel 686 belongs to the nickel alloys classification, while AISI 204 stainless steel belongs to the iron alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is nickel 686 and the bottom bar is AISI 204 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 51
23 to 39
Fatigue Strength, MPa 410
320 to 720
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 560
500 to 700
Tensile Strength: Ultimate (UTS), MPa 780
730 to 1100
Tensile Strength: Yield (Proof), MPa 350
380 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 980
850
Melting Completion (Liquidus), °C 1380
1410
Melting Onset (Solidus), °C 1340
1370
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 9.8
15
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.4
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 70
10
Density, g/cm3 9.0
7.7
Embodied Carbon, kg CO2/kg material 12
2.4
Embodied Energy, MJ/kg 170
35
Embodied Water, L/kg 300
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
240 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 280
360 to 2940
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24
27 to 40
Strength to Weight: Bending, points 21
24 to 31
Thermal Diffusivity, mm2/s 2.6
4.1
Thermal Shock Resistance, points 21
16 to 24

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.030
Chromium (Cr), % 19 to 23
15 to 17
Iron (Fe), % 0 to 5.0
69.6 to 76.4
Manganese (Mn), % 0 to 0.75
7.0 to 9.0
Molybdenum (Mo), % 15 to 17
0
Nickel (Ni), % 49.5 to 63
1.5 to 3.0
Nitrogen (N), % 0
0.15 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.080
0 to 1.0
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