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EN AC-51500 Aluminum vs. EN 1.4558 Stainless Steel

EN AC-51500 aluminum belongs to the aluminum alloys classification, while EN 1.4558 stainless steel belongs to the iron alloys. There are 29 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-51500 aluminum and the bottom bar is EN 1.4558 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 5.6
39
Fatigue Strength, MPa 120
170
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 280
510
Tensile Strength: Yield (Proof), MPa 160
200

Thermal Properties

Latent Heat of Fusion, J/g 430
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 630
1400
Melting Onset (Solidus), °C 590
1350
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 120
12
Thermal Expansion, µm/m-K 23
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 88
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
31
Density, g/cm3 2.6
8.0
Embodied Carbon, kg CO2/kg material 9.0
5.5
Embodied Energy, MJ/kg 150
77
Embodied Water, L/kg 1150
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13
160
Resilience: Unit (Modulus of Resilience), kJ/m3 190
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 52
24
Strength to Weight: Axial, points 29
18
Strength to Weight: Bending, points 36
18
Thermal Diffusivity, mm2/s 49
3.1
Thermal Shock Resistance, points 13
12

Alloy Composition

Aluminum (Al), % 89.8 to 93.1
0.15 to 0.45
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
20 to 23
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.25
39.2 to 47.9
Magnesium (Mg), % 4.7 to 6.0
0
Manganese (Mn), % 0.4 to 0.8
0 to 1.0
Nickel (Ni), % 0
32 to 35
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 1.8 to 2.6
0 to 0.7
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.25
0 to 0.6
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.15
0