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AISI 431 Stainless Steel vs. Grade CX2MW Nickel

AISI 431 stainless steel belongs to the iron alloys classification, while grade CX2MW nickel belongs to the nickel alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 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 AISI 431 stainless steel and the bottom bar is grade CX2MW nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 15 to 17
34
Fatigue Strength, MPa 430 to 610
260
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
84
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
620
Tensile Strength: Yield (Proof), MPa 710 to 1040
350

Thermal Properties

Latent Heat of Fusion, J/g 280
330
Maximum Temperature: Mechanical, °C 850
980
Melting Completion (Liquidus), °C 1510
1550
Melting Onset (Solidus), °C 1450
1490
Specific Heat Capacity, J/kg-K 480
430
Thermal Conductivity, W/m-K 26
10
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
65
Density, g/cm3 7.7
8.9
Embodied Carbon, kg CO2/kg material 2.2
12
Embodied Energy, MJ/kg 31
170
Embodied Water, L/kg 120
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
180
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 32 to 50
19
Strength to Weight: Bending, points 27 to 36
18
Thermal Diffusivity, mm2/s 7.0
2.7
Thermal Shock Resistance, points 28 to 43
17

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.020
Chromium (Cr), % 15 to 17
20 to 22.5
Iron (Fe), % 78.2 to 83.8
2.0 to 6.0
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
12.5 to 14.5
Nickel (Ni), % 1.3 to 2.5
51.3 to 63
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 0
2.5 to 3.5
Vanadium (V), % 0
0 to 0.35