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S21640 Stainless Steel vs. Nickel 693

S21640 stainless steel belongs to the iron alloys classification, while nickel 693 belongs to the nickel 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 S21640 stainless steel and the bottom bar is nickel 693.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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