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EN AC-51400 Aluminum vs. AISI 418 Stainless Steel

EN AC-51400 aluminum belongs to the aluminum alloys classification, while AISI 418 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is EN AC-51400 aluminum and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 71
330
Elastic (Young's, Tensile) Modulus, GPa 67
200
Elongation at Break, % 3.4
17
Fatigue Strength, MPa 85
520
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 25
77
Tensile Strength: Ultimate (UTS), MPa 190
1100
Tensile Strength: Yield (Proof), MPa 120
850

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Maximum Temperature: Mechanical, °C 170
770
Melting Completion (Liquidus), °C 640
1500
Melting Onset (Solidus), °C 600
1460
Specific Heat Capacity, J/kg-K 910
470
Thermal Conductivity, W/m-K 110
25
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 110
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
15
Density, g/cm3 2.7
8.0
Embodied Carbon, kg CO2/kg material 9.1
2.9
Embodied Energy, MJ/kg 150
41
Embodied Water, L/kg 1170
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
170
Resilience: Unit (Modulus of Resilience), kJ/m3 110
1830
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
24
Strength to Weight: Axial, points 20
38
Strength to Weight: Bending, points 28
29
Thermal Diffusivity, mm2/s 46
6.7
Thermal Shock Resistance, points 8.6
40

Alloy Composition

Aluminum (Al), % 90.5 to 95.5
0
Carbon (C), % 0
0.15 to 0.2
Chromium (Cr), % 0
12 to 14
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.55
78.5 to 83.6
Magnesium (Mg), % 4.5 to 6.5
0
Manganese (Mn), % 0 to 0.45
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
1.8 to 2.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
2.5 to 3.5
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0