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Nickel 693 vs. S21640 Stainless Steel

Nickel 693 belongs to the nickel alloys classification, while S21640 stainless steel belongs to the iron alloys. They have a modest 29% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is nickel 693 and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
46
Fatigue Strength, MPa 230
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Shear Strength, MPa 440
520
Tensile Strength: Ultimate (UTS), MPa 660
740
Tensile Strength: Yield (Proof), MPa 310
350

Thermal Properties

Latent Heat of Fusion, J/g 330
290
Maximum Temperature: Mechanical, °C 1010
940
Melting Completion (Liquidus), °C 1350
1430
Melting Onset (Solidus), °C 1310
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 9.1
15
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 60
17
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 9.9
3.6
Embodied Energy, MJ/kg 140
51
Embodied Water, L/kg 320
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
280
Resilience: Unit (Modulus of Resilience), kJ/m3 250
300
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23
27
Strength to Weight: Bending, points 21
23
Thermal Diffusivity, mm2/s 2.3
4.0
Thermal Shock Resistance, points 19
16

Alloy Composition

Aluminum (Al), % 2.5 to 4.0
0
Carbon (C), % 0 to 0.15
0 to 0.080
Chromium (Cr), % 27 to 31
17.5 to 19.5
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 2.5 to 6.0
63 to 74.3
Manganese (Mn), % 0 to 1.0
3.5 to 6.5
Molybdenum (Mo), % 0
0.5 to 2.0
Nickel (Ni), % 53.3 to 67.5
4.0 to 6.5
Niobium (Nb), % 0.5 to 2.5
0.1 to 1.0
Nitrogen (N), % 0
0.080 to 0.3
Phosphorus (P), % 0
0 to 0.060
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 1.0
0