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S21904 Stainless Steel vs. Nickel 693

S21904 stainless steel belongs to the iron alloys classification, while nickel 693 belongs to the nickel alloys. They have a modest 32% 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 S21904 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, % 17 to 51
34
Fatigue Strength, MPa 380 to 550
230
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Shear Strength, MPa 510 to 620
440
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
660
Tensile Strength: Yield (Proof), MPa 390 to 910
310

Thermal Properties

Latent Heat of Fusion, J/g 290
330
Maximum Temperature: Mechanical, °C 980
1010
Melting Completion (Liquidus), °C 1400
1350
Melting Onset (Solidus), °C 1350
1310
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
9.1
Thermal Expansion, µm/m-K 17
13

Otherwise Unclassified Properties

Base Metal Price, % relative 15
60
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 3.0
9.9
Embodied Energy, MJ/kg 43
140
Embodied Water, L/kg 160
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
190
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
250
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
23
Strength to Weight: Bending, points 23 to 29
21
Thermal Diffusivity, mm2/s 3.8
2.3
Thermal Shock Resistance, points 15 to 21
19

Alloy Composition

Aluminum (Al), % 0
2.5 to 4.0
Carbon (C), % 0 to 0.040
0 to 0.15
Chromium (Cr), % 19 to 21.5
27 to 31
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 59.5 to 67.4
2.5 to 6.0
Manganese (Mn), % 8.0 to 10
0 to 1.0
Nickel (Ni), % 5.5 to 7.5
53.3 to 67.5
Niobium (Nb), % 0
0.5 to 2.5
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
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