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EN AC-42100 Aluminum vs. S32101 Stainless Steel

EN AC-42100 aluminum belongs to the aluminum alloys classification, while S32101 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-42100 aluminum and the bottom bar is S32101 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 91
260
Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 3.4 to 9.0
34
Fatigue Strength, MPa 76 to 82
400
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
78
Tensile Strength: Ultimate (UTS), MPa 280 to 290
740
Tensile Strength: Yield (Proof), MPa 210 to 230
500

Thermal Properties

Latent Heat of Fusion, J/g 500
290
Maximum Temperature: Mechanical, °C 170
1000
Melting Completion (Liquidus), °C 610
1420
Melting Onset (Solidus), °C 600
1370
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.6
7.7
Embodied Carbon, kg CO2/kg material 8.0
2.6
Embodied Energy, MJ/kg 150
38
Embodied Water, L/kg 1110
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.1 to 23
230
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 370
640
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 30 to 31
27
Strength to Weight: Bending, points 37 to 38
24
Thermal Diffusivity, mm2/s 66
4.0
Thermal Shock Resistance, points 13
20

Alloy Composition

Aluminum (Al), % 91.3 to 93.3
0
Carbon (C), % 0
0 to 0.040
Chromium (Cr), % 0
21 to 22
Copper (Cu), % 0 to 0.050
0.1 to 0.8
Iron (Fe), % 0 to 0.19
67.3 to 73.3
Magnesium (Mg), % 0.25 to 0.45
0
Manganese (Mn), % 0 to 0.1
4.0 to 6.0
Molybdenum (Mo), % 0
0.1 to 0.8
Nickel (Ni), % 0
1.4 to 1.7
Nitrogen (N), % 0
0.2 to 0.25
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 6.5 to 7.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0