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Nickel 686 vs. S44700 Stainless Steel

Nickel 686 belongs to the nickel alloys classification, while S44700 stainless steel belongs to the iron alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is nickel 686 and the bottom bar is S44700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 51
23
Fatigue Strength, MPa 410
300
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 77
82
Shear Strength, MPa 560
380
Tensile Strength: Ultimate (UTS), MPa 780
600
Tensile Strength: Yield (Proof), MPa 350
450

Thermal Properties

Latent Heat of Fusion, J/g 320
300
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1380
1460
Melting Onset (Solidus), °C 1340
1410
Specific Heat Capacity, J/kg-K 420
480
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 70
18
Density, g/cm3 9.0
7.8
Embodied Carbon, kg CO2/kg material 12
3.6
Embodied Energy, MJ/kg 170
49
Embodied Water, L/kg 300
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
120
Resilience: Unit (Modulus of Resilience), kJ/m3 280
480
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24
21
Strength to Weight: Bending, points 21
20
Thermal Shock Resistance, points 21
19

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.010
Chromium (Cr), % 19 to 23
28 to 30
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 0 to 5.0
64.9 to 68.5
Manganese (Mn), % 0 to 0.75
0 to 0.3
Molybdenum (Mo), % 15 to 17
3.5 to 4.2
Nickel (Ni), % 49.5 to 63
0 to 0.15
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 0.080
0 to 0.2
Sulfur (S), % 0 to 0.020
0 to 0.020
Titanium (Ti), % 0.020 to 0.25
0
Tungsten (W), % 3.0 to 4.4
0