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EN AC-44000 Aluminum vs. S17400 Stainless Steel

EN AC-44000 aluminum belongs to the aluminum alloys classification, while S17400 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (6, 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-44000 aluminum and the bottom bar is S17400 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 51
280 to 440
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 7.3
11 to 21
Fatigue Strength, MPa 64
380 to 670
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
75
Tensile Strength: Ultimate (UTS), MPa 180
910 to 1390
Tensile Strength: Yield (Proof), MPa 86
580 to 1250

Thermal Properties

Latent Heat of Fusion, J/g 560
280
Maximum Temperature: Mechanical, °C 170
850
Melting Completion (Liquidus), °C 590
1440
Melting Onset (Solidus), °C 590
1400
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 140
17
Thermal Expansion, µm/m-K 21
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
14
Density, g/cm3 2.5
7.8
Embodied Carbon, kg CO2/kg material 7.8
2.7
Embodied Energy, MJ/kg 150
39
Embodied Water, L/kg 1070
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
140 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 51
880 to 4060
Stiffness to Weight: Axial, points 16
14
Stiffness to Weight: Bending, points 55
25
Strength to Weight: Axial, points 20
32 to 49
Strength to Weight: Bending, points 28
27 to 35
Thermal Diffusivity, mm2/s 61
4.5
Thermal Shock Resistance, points 8.4
30 to 46

Alloy Composition


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Aluminum (Al), % 87.1 to 90
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0
15 to 17
Copper (Cu), % 0 to 0.050
3.0 to 5.0
Iron (Fe), % 0 to 0.19
70.4 to 78.9
Magnesium (Mg), % 0 to 0.45
0
Manganese (Mn), % 0 to 0.1
0 to 1.0
Nickel (Ni), % 0
3.0 to 5.0
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 10 to 11.8
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0