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AISI 309S Stainless Steel vs. EN AC-47100 Aluminum

AISI 309S stainless steel belongs to the iron alloys classification, while EN AC-47100 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 309S stainless steel and the bottom bar is EN AC-47100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
80
Elastic (Young's, Tensile) Modulus, GPa 200
73
Elongation at Break, % 42
1.1
Fatigue Strength, MPa 210
110
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 78
27
Tensile Strength: Ultimate (UTS), MPa 580
270
Tensile Strength: Yield (Proof), MPa 230
160

Thermal Properties

Latent Heat of Fusion, J/g 290
570
Maximum Temperature: Mechanical, °C 1080
170
Melting Completion (Liquidus), °C 1420
590
Melting Onset (Solidus), °C 1370
560
Specific Heat Capacity, J/kg-K 480
890
Thermal Conductivity, W/m-K 15
130
Thermal Expansion, µm/m-K 16
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
30
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
100

Otherwise Unclassified Properties

Base Metal Price, % relative 19
9.5
Density, g/cm3 7.8
2.6
Embodied Carbon, kg CO2/kg material 3.6
7.6
Embodied Energy, MJ/kg 51
140
Embodied Water, L/kg 170
1030

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
2.6
Resilience: Unit (Modulus of Resilience), kJ/m3 140
170
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
53
Strength to Weight: Axial, points 21
28
Strength to Weight: Bending, points 20
35
Thermal Diffusivity, mm2/s 4.0
54
Thermal Shock Resistance, points 13
12

Alloy Composition

Aluminum (Al), % 0
81.4 to 88.8
Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 22 to 24
0 to 0.1
Copper (Cu), % 0
0.7 to 1.2
Iron (Fe), % 58.1 to 66
0 to 1.3
Lead (Pb), % 0
0 to 0.2
Magnesium (Mg), % 0
0 to 0.35
Manganese (Mn), % 0 to 2.0
0 to 0.55
Nickel (Ni), % 12 to 15
0 to 0.3
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
Tin (Sn), % 0
0 to 0.1
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.55
Residuals, % 0
0 to 0.25