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EN AC-44300 Aluminum vs. S21900 Stainless Steel

EN AC-44300 aluminum belongs to the aluminum alloys classification, while S21900 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-44300 aluminum and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 68
220
Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 1.1
50
Fatigue Strength, MPa 100
380
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
78
Tensile Strength: Ultimate (UTS), MPa 270
710
Tensile Strength: Yield (Proof), MPa 150
390

Thermal Properties

Latent Heat of Fusion, J/g 570
290
Maximum Temperature: Mechanical, °C 170
980
Melting Completion (Liquidus), °C 590
1400
Melting Onset (Solidus), °C 580
1350
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 130
14
Thermal Expansion, µm/m-K 21
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
15
Density, g/cm3 2.5
7.7
Embodied Carbon, kg CO2/kg material 7.7
3.0
Embodied Energy, MJ/kg 140
43
Embodied Water, L/kg 1050
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6
300
Resilience: Unit (Modulus of Resilience), kJ/m3 150
380
Stiffness to Weight: Axial, points 16
14
Stiffness to Weight: Bending, points 55
25
Strength to Weight: Axial, points 29
26
Strength to Weight: Bending, points 36
23
Thermal Diffusivity, mm2/s 58
3.8
Thermal Shock Resistance, points 13
15

Alloy Composition

Aluminum (Al), % 84.3 to 89.5
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
19 to 21.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 1.0
59.4 to 67.4
Manganese (Mn), % 0 to 0.55
8.0 to 10
Nickel (Ni), % 0
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
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
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.15
0
Residuals, % 0 to 0.25
0