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4047 Aluminum vs. AISI 309H Stainless Steel

4047 aluminum belongs to the aluminum alloys classification, while AISI 309H stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (6, 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 4047 aluminum and the bottom bar is AISI 309H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
200
Elongation at Break, % 3.4
40
Fatigue Strength, MPa 45
200
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 27
78
Shear Strength, MPa 69
400
Tensile Strength: Ultimate (UTS), MPa 120
580
Tensile Strength: Yield (Proof), MPa 64
230

Thermal Properties

Latent Heat of Fusion, J/g 570
290
Maximum Temperature: Mechanical, °C 160
1080
Melting Completion (Liquidus), °C 580
1420
Melting Onset (Solidus), °C 580
1370
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 130
15
Thermal Expansion, µm/m-K 21
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 120
2.5

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.5
190
Resilience: Unit (Modulus of Resilience), kJ/m3 28
130
Stiffness to Weight: Axial, points 16
14
Stiffness to Weight: Bending, points 55
25
Strength to Weight: Axial, points 13
21
Strength to Weight: Bending, points 21
20
Thermal Diffusivity, mm2/s 59
4.0
Thermal Shock Resistance, points 5.6
13

Alloy Composition

Aluminum (Al), % 85.3 to 89
0
Carbon (C), % 0
0.040 to 0.1
Chromium (Cr), % 0
22 to 24
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 0 to 0.8
58.1 to 66
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.15
0 to 2.0
Nickel (Ni), % 0
12 to 15
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 11 to 13
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0