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S43940 Stainless Steel vs. Grade CX2MW Nickel

S43940 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 S43940 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, % 21
34
Fatigue Strength, MPa 180
260
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
84
Tensile Strength: Ultimate (UTS), MPa 490
620
Tensile Strength: Yield (Proof), MPa 280
350

Thermal Properties

Latent Heat of Fusion, J/g 280
330
Maximum Temperature: Mechanical, °C 890
980
Melting Completion (Liquidus), °C 1440
1550
Melting Onset (Solidus), °C 1400
1490
Specific Heat Capacity, J/kg-K 480
430
Thermal Conductivity, W/m-K 25
10
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
65
Density, g/cm3 7.7
8.9
Embodied Carbon, kg CO2/kg material 2.6
12
Embodied Energy, MJ/kg 38
170
Embodied Water, L/kg 120
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86
180
Resilience: Unit (Modulus of Resilience), kJ/m3 200
290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 18
18
Thermal Diffusivity, mm2/s 6.8
2.7
Thermal Shock Resistance, points 18
17

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.020
Chromium (Cr), % 17.5 to 18.5
20 to 22.5
Iron (Fe), % 78.2 to 82.1
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), % 0
51.3 to 63
Niobium (Nb), % 0.3 to 0.6
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.015
0 to 0.025
Titanium (Ti), % 0.1 to 0.6
0
Tungsten (W), % 0
2.5 to 3.5
Vanadium (V), % 0
0 to 0.35