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Nickel 684 vs. S31266 Stainless Steel

Nickel 684 belongs to the nickel alloys classification, while S31266 stainless steel belongs to the iron alloys. They have 47% of their average alloy composition in common. 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 684 and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 11
40
Fatigue Strength, MPa 390
400
Poisson's Ratio 0.29
0.28
Reduction in Area, % 17
56
Shear Modulus, GPa 76
81
Shear Strength, MPa 710
590
Tensile Strength: Ultimate (UTS), MPa 1190
860
Tensile Strength: Yield (Proof), MPa 800
470

Thermal Properties

Latent Heat of Fusion, J/g 320
310
Maximum Temperature: Mechanical, °C 1000
1100
Melting Completion (Liquidus), °C 1370
1470
Melting Onset (Solidus), °C 1320
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 75
37
Density, g/cm3 8.3
8.2
Embodied Carbon, kg CO2/kg material 10
6.5
Embodied Energy, MJ/kg 140
89
Embodied Water, L/kg 360
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
290
Resilience: Unit (Modulus of Resilience), kJ/m3 1610
540
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 40
29
Strength to Weight: Bending, points 30
24
Thermal Shock Resistance, points 34
18

Alloy Composition

Aluminum (Al), % 2.5 to 3.3
0
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 15 to 20
23 to 25
Cobalt (Co), % 13 to 20
0
Copper (Cu), % 0 to 0.15
1.0 to 2.5
Iron (Fe), % 0 to 4.0
34.1 to 46
Manganese (Mn), % 0 to 0.75
2.0 to 4.0
Molybdenum (Mo), % 3.0 to 5.0
5.2 to 6.2
Nickel (Ni), % 42.7 to 64
21 to 24
Nitrogen (N), % 0
0.35 to 0.6
Phosphorus (P), % 0 to 0.015
0 to 0.035
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.020
Titanium (Ti), % 2.5 to 3.3
0
Tungsten (W), % 0
1.5 to 2.5