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AISI 309 Stainless Steel vs. EN AC-44200 Aluminum

AISI 309 stainless steel belongs to the iron alloys classification, while EN AC-44200 aluminum belongs to the aluminum 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 AISI 309 stainless steel and the bottom bar is EN AC-44200 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
60
Elastic (Young's, Tensile) Modulus, GPa 200
72
Elongation at Break, % 34 to 47
6.2
Fatigue Strength, MPa 250 to 280
63
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 78
27
Tensile Strength: Ultimate (UTS), MPa 600 to 710
180
Tensile Strength: Yield (Proof), MPa 260 to 350
86

Thermal Properties

Latent Heat of Fusion, J/g 290
570
Maximum Temperature: Mechanical, °C 980
170
Melting Completion (Liquidus), °C 1450
590
Melting Onset (Solidus), °C 1400
580
Specific Heat Capacity, J/kg-K 480
910
Thermal Conductivity, W/m-K 16
130
Thermal Expansion, µm/m-K 15
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
35
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
130

Otherwise Unclassified Properties

Base Metal Price, % relative 19
9.5
Density, g/cm3 7.8
2.5
Embodied Carbon, kg CO2/kg material 3.6
7.7
Embodied Energy, MJ/kg 51
140
Embodied Water, L/kg 170
1050

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
9.1
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 310
51
Stiffness to Weight: Axial, points 14
16
Stiffness to Weight: Bending, points 25
55
Strength to Weight: Axial, points 21 to 25
20
Strength to Weight: Bending, points 20 to 23
28
Thermal Diffusivity, mm2/s 4.3
59
Thermal Shock Resistance, points 14 to 16
8.4

Alloy Composition

Aluminum (Al), % 0
85.2 to 89.5
Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 22 to 24
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 58 to 66
0 to 0.55
Manganese (Mn), % 0 to 2.0
0 to 0.35
Nickel (Ni), % 12 to 15
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
10.5 to 13.5
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15