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AISI 444 Stainless Steel vs. Nickel 22

AISI 444 stainless steel belongs to the iron alloys classification, while nickel 22 belongs to the nickel 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 AISI 444 stainless steel and the bottom bar is nickel 22.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 23
49
Fatigue Strength, MPa 210
330
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
84
Shear Strength, MPa 300
560
Tensile Strength: Ultimate (UTS), MPa 470
790
Tensile Strength: Yield (Proof), MPa 310
360

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Maximum Temperature: Mechanical, °C 930
990
Melting Completion (Liquidus), °C 1460
1390
Melting Onset (Solidus), °C 1420
1360
Specific Heat Capacity, J/kg-K 480
430
Thermal Conductivity, W/m-K 23
10
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 15
70
Density, g/cm3 7.7
8.9
Embodied Carbon, kg CO2/kg material 3.4
12
Embodied Energy, MJ/kg 47
170
Embodied Water, L/kg 130
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
320
Resilience: Unit (Modulus of Resilience), kJ/m3 240
300
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 17
25
Strength to Weight: Bending, points 17
21
Thermal Diffusivity, mm2/s 6.2
2.7
Thermal Shock Resistance, points 16
24

Alloy Composition

Carbon (C), % 0 to 0.025
0 to 0.015
Chromium (Cr), % 17.5 to 19.5
20 to 22.5
Cobalt (Co), % 0
0 to 2.5
Iron (Fe), % 73.3 to 80.8
2.0 to 6.0
Manganese (Mn), % 0 to 1.0
0 to 0.015
Molybdenum (Mo), % 1.8 to 2.5
12.5 to 14.5
Nickel (Ni), % 0 to 1.0
50.8 to 63
Niobium (Nb), % 0.2 to 0.8
0
Nitrogen (N), % 0 to 0.035
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.080
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0.2 to 0.8
0
Tungsten (W), % 0
2.5 to 3.5
Vanadium (V), % 0
0 to 0.35