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A444.0 Aluminum vs. N08801 Stainless Steel

A444.0 aluminum belongs to the aluminum alloys classification, while N08801 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 A444.0 aluminum and the bottom bar is N08801 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 18
34
Fatigue Strength, MPa 37
260
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 160
860
Tensile Strength: Yield (Proof), MPa 66
190

Thermal Properties

Latent Heat of Fusion, J/g 500
300
Maximum Temperature: Mechanical, °C 170
1090
Melting Completion (Liquidus), °C 630
1390
Melting Onset (Solidus), °C 590
1360
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 160
12
Thermal Expansion, µm/m-K 22
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 140
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
30
Density, g/cm3 2.6
8.0
Embodied Carbon, kg CO2/kg material 7.9
5.5
Embodied Energy, MJ/kg 150
79
Embodied Water, L/kg 1110
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24
220
Resilience: Unit (Modulus of Resilience), kJ/m3 31
92
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
24
Strength to Weight: Axial, points 17
30
Strength to Weight: Bending, points 25
25
Thermal Diffusivity, mm2/s 68
3.3
Thermal Shock Resistance, points 7.3
20

Alloy Composition

Aluminum (Al), % 91.6 to 93.5
0
Carbon (C), % 0
0 to 0.1
Chromium (Cr), % 0
19 to 22
Copper (Cu), % 0 to 0.1
0 to 0.5
Iron (Fe), % 0 to 0.2
39.5 to 50.3
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.1
0 to 1.5
Nickel (Ni), % 0
30 to 34
Silicon (Si), % 6.5 to 7.5
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.2
0.75 to 1.5
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0