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5040 Aluminum vs. N08800 Stainless Steel

5040 aluminum belongs to the aluminum alloys classification, while N08800 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 5040 aluminum and the bottom bar is N08800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 5.7 to 6.8
4.5 to 34
Fatigue Strength, MPa 100 to 130
150 to 390
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 140 to 150
340 to 580
Tensile Strength: Ultimate (UTS), MPa 240 to 260
500 to 1000
Tensile Strength: Yield (Proof), MPa 190 to 230
190 to 830

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 190
1100
Melting Completion (Liquidus), °C 650
1390
Melting Onset (Solidus), °C 600
1360
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 160
12
Thermal Expansion, µm/m-K 23
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 130
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
30
Density, g/cm3 2.8
8.0
Embodied Carbon, kg CO2/kg material 8.3
5.3
Embodied Energy, MJ/kg 150
76
Embodied Water, L/kg 1180
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14 to 15
42 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 380
96 to 1740
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 24 to 26
18 to 35
Strength to Weight: Bending, points 31 to 32
18 to 28
Thermal Diffusivity, mm2/s 64
3.0
Thermal Shock Resistance, points 10 to 11
13 to 25

Alloy Composition

Aluminum (Al), % 95.2 to 98
0.15 to 0.6
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0.1 to 0.3
19 to 23
Copper (Cu), % 0 to 0.25
0 to 0.75
Iron (Fe), % 0 to 0.7
39.5 to 50.7
Magnesium (Mg), % 1.0 to 1.5
0
Manganese (Mn), % 0.9 to 1.4
0 to 1.5
Nickel (Ni), % 0
30 to 35
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0