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Nickel 22 vs. S21900 Stainless Steel

Nickel 22 belongs to the nickel alloys classification, while S21900 stainless steel belongs to the iron alloys. They have a modest 31% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is nickel 22 and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 49
50
Fatigue Strength, MPa 330
380
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 84
78
Shear Strength, MPa 560
510
Tensile Strength: Ultimate (UTS), MPa 790
710
Tensile Strength: Yield (Proof), MPa 360
390

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Maximum Temperature: Mechanical, °C 990
980
Melting Completion (Liquidus), °C 1390
1400
Melting Onset (Solidus), °C 1360
1350
Specific Heat Capacity, J/kg-K 430
480
Thermal Conductivity, W/m-K 10
14
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.5
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 70
15
Density, g/cm3 8.9
7.7
Embodied Carbon, kg CO2/kg material 12
3.0
Embodied Energy, MJ/kg 170
43
Embodied Water, L/kg 300
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
300
Resilience: Unit (Modulus of Resilience), kJ/m3 300
380
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 25
26
Strength to Weight: Bending, points 21
23
Thermal Diffusivity, mm2/s 2.7
3.8
Thermal Shock Resistance, points 24
15

Alloy Composition

Carbon (C), % 0 to 0.015
0 to 0.080
Chromium (Cr), % 20 to 22.5
19 to 21.5
Cobalt (Co), % 0 to 2.5
0
Iron (Fe), % 2.0 to 6.0
59.4 to 67.4
Manganese (Mn), % 0 to 0.015
8.0 to 10
Molybdenum (Mo), % 12.5 to 14.5
0
Nickel (Ni), % 50.8 to 63
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.020
0 to 0.045
Silicon (Si), % 0 to 0.080
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 2.5 to 3.5
0
Vanadium (V), % 0 to 0.35
0