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Nickel 22 vs. S20431 Stainless Steel

Nickel 22 belongs to the nickel alloys classification, while S20431 stainless steel belongs to the iron alloys. They have a modest 25% 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 S20431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 49
46
Fatigue Strength, MPa 330
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 84
76
Shear Strength, MPa 560
500
Tensile Strength: Ultimate (UTS), MPa 790
710
Tensile Strength: Yield (Proof), MPa 360
350

Thermal Properties

Latent Heat of Fusion, J/g 320
280
Maximum Temperature: Mechanical, °C 990
890
Melting Completion (Liquidus), °C 1390
1400
Melting Onset (Solidus), °C 1360
1360
Specific Heat Capacity, J/kg-K 430
480
Thermal Conductivity, W/m-K 10
15
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.5
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 70
12
Density, g/cm3 8.9
7.7
Embodied Carbon, kg CO2/kg material 12
2.5
Embodied Energy, MJ/kg 170
36
Embodied Water, L/kg 300
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
270
Resilience: Unit (Modulus of Resilience), kJ/m3 300
310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 25
25
Strength to Weight: Bending, points 21
23
Thermal Diffusivity, mm2/s 2.7
4.0
Thermal Shock Resistance, points 24
15

Alloy Composition

Carbon (C), % 0 to 0.015
0 to 0.12
Chromium (Cr), % 20 to 22.5
17 to 18
Cobalt (Co), % 0 to 2.5
0
Copper (Cu), % 0
1.5 to 3.5
Iron (Fe), % 2.0 to 6.0
66.1 to 74.4
Manganese (Mn), % 0 to 0.015
5.0 to 7.0
Molybdenum (Mo), % 12.5 to 14.5
0
Nickel (Ni), % 50.8 to 63
2.0 to 4.0
Nitrogen (N), % 0
0.1 to 0.25
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