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EN AC-47100 Aluminum vs. S20432 Stainless Steel

EN AC-47100 aluminum belongs to the aluminum alloys classification, while S20432 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-47100 aluminum and the bottom bar is S20432 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
170
Elastic (Young's, Tensile) Modulus, GPa 73
200
Elongation at Break, % 1.1
45
Fatigue Strength, MPa 110
210
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Tensile Strength: Ultimate (UTS), MPa 270
580
Tensile Strength: Yield (Proof), MPa 160
230

Thermal Properties

Latent Heat of Fusion, J/g 570
280
Maximum Temperature: Mechanical, °C 170
900
Melting Completion (Liquidus), °C 590
1410
Melting Onset (Solidus), °C 560
1370
Specific Heat Capacity, J/kg-K 890
480
Thermal Conductivity, W/m-K 130
15
Thermal Expansion, µm/m-K 21
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 100
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 7.6
2.7
Embodied Energy, MJ/kg 140
38
Embodied Water, L/kg 1030
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6
210
Resilience: Unit (Modulus of Resilience), kJ/m3 170
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 28
21
Strength to Weight: Bending, points 35
20
Thermal Diffusivity, mm2/s 54
4.0
Thermal Shock Resistance, points 12
13

Alloy Composition

Aluminum (Al), % 81.4 to 88.8
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0 to 0.1
17 to 18
Copper (Cu), % 0.7 to 1.2
2.0 to 3.0
Iron (Fe), % 0 to 1.3
66.7 to 74
Lead (Pb), % 0 to 0.2
0
Magnesium (Mg), % 0 to 0.35
0
Manganese (Mn), % 0 to 0.55
3.0 to 5.0
Nickel (Ni), % 0 to 0.3
4.0 to 6.0
Nitrogen (N), % 0
0.050 to 0.2
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 10.5 to 13.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 0 to 0.1
0
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.55
0
Residuals, % 0 to 0.25
0