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AISI 440A Stainless Steel vs. EN 2.4668 Nickel

AISI 440A stainless steel belongs to the iron alloys classification, while EN 2.4668 nickel belongs to the nickel alloys. They have a modest 36% 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 (4, in this case) are not shown.

For each property being compared, the top bar is AISI 440A stainless steel and the bottom bar is EN 2.4668 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 5.0 to 20
14
Fatigue Strength, MPa 270 to 790
590
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
75
Shear Strength, MPa 450 to 1040
840
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
1390
Tensile Strength: Yield (Proof), MPa 420 to 1650
1160

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Mechanical, °C 760
980
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 23
13
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
75
Density, g/cm3 7.7
8.3
Embodied Carbon, kg CO2/kg material 2.2
13
Embodied Energy, MJ/kg 31
190
Embodied Water, L/kg 120
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 120
180
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 26 to 65
46
Strength to Weight: Bending, points 23 to 43
33
Thermal Diffusivity, mm2/s 6.2
3.5
Thermal Shock Resistance, points 26 to 65
40

Alloy Composition

Aluminum (Al), % 0
0.3 to 0.7
Boron (B), % 0
0.0020 to 0.0060
Carbon (C), % 0.6 to 0.75
0.020 to 0.080
Chromium (Cr), % 16 to 18
17 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 78.4 to 83.4
11.2 to 24.6
Manganese (Mn), % 0 to 1.0
0 to 0.35
Molybdenum (Mo), % 0 to 0.75
2.8 to 3.3
Nickel (Ni), % 0
50 to 55
Niobium (Nb), % 0
4.7 to 5.5
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0
0.6 to 1.2