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AISI 418 Stainless Steel vs. Grade CX2MW Nickel

AISI 418 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 418 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, % 17
34
Fatigue Strength, MPa 520
260
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
84
Tensile Strength: Ultimate (UTS), MPa 1100
620
Tensile Strength: Yield (Proof), MPa 850
350

Thermal Properties

Latent Heat of Fusion, J/g 270
330
Maximum Temperature: Mechanical, °C 770
980
Melting Completion (Liquidus), °C 1500
1550
Melting Onset (Solidus), °C 1460
1490
Specific Heat Capacity, J/kg-K 470
430
Thermal Conductivity, W/m-K 25
10
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 15
65
Density, g/cm3 8.0
8.9
Embodied Carbon, kg CO2/kg material 2.9
12
Embodied Energy, MJ/kg 41
170
Embodied Water, L/kg 110
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
180
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
290
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 38
19
Strength to Weight: Bending, points 29
18
Thermal Diffusivity, mm2/s 6.7
2.7
Thermal Shock Resistance, points 40
17

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.020
Chromium (Cr), % 12 to 14
20 to 22.5
Iron (Fe), % 78.5 to 83.6
2.0 to 6.0
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
12.5 to 14.5
Nickel (Ni), % 1.8 to 2.2
51.3 to 63
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 2.5 to 3.5
2.5 to 3.5
Vanadium (V), % 0
0 to 0.35