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Nickel 684 vs. S44535 Stainless Steel

Nickel 684 belongs to the nickel alloys classification, while S44535 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 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is nickel 684 and the bottom bar is S44535 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 310
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11
28
Fatigue Strength, MPa 390
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 76
78
Shear Strength, MPa 710
290
Tensile Strength: Ultimate (UTS), MPa 1190
450
Tensile Strength: Yield (Proof), MPa 800
290

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 1000
1000
Melting Completion (Liquidus), °C 1370
1430
Melting Onset (Solidus), °C 1320
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

Base Metal Price, % relative 75
11
Density, g/cm3 8.3
7.7
Embodied Carbon, kg CO2/kg material 10
2.4
Embodied Energy, MJ/kg 140
34
Embodied Water, L/kg 360
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1610
200
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 40
16
Strength to Weight: Bending, points 30
17
Thermal Shock Resistance, points 34
15

Alloy Composition

Aluminum (Al), % 2.5 to 3.3
0 to 0.5
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 15 to 20
20 to 24
Cobalt (Co), % 13 to 20
0
Copper (Cu), % 0 to 0.15
0 to 0.5
Iron (Fe), % 0 to 4.0
73.2 to 79.6
Lanthanum (La), % 0
0.040 to 0.2
Manganese (Mn), % 0 to 0.75
0.3 to 0.8
Molybdenum (Mo), % 3.0 to 5.0
0
Nickel (Ni), % 42.7 to 64
0
Phosphorus (P), % 0 to 0.015
0 to 0.050
Silicon (Si), % 0 to 0.75
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.020
Titanium (Ti), % 2.5 to 3.3
0.030 to 0.2