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1070 Aluminum vs. AISI 444 Stainless Steel

1070 aluminum belongs to the aluminum alloys classification, while AISI 444 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 1070 aluminum and the bottom bar is AISI 444 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 4.5 to 39
23
Fatigue Strength, MPa 22 to 49
210
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
78
Shear Strength, MPa 48 to 79
300
Tensile Strength: Ultimate (UTS), MPa 73 to 140
470
Tensile Strength: Yield (Proof), MPa 17 to 120
310

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 170
930
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 640
1420
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 230
23
Thermal Expansion, µm/m-K 23
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 61
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 200
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
15
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.3
3.4
Embodied Energy, MJ/kg 160
47
Embodied Water, L/kg 1200
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.8 to 21
95
Resilience: Unit (Modulus of Resilience), kJ/m3 2.1 to 110
240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 7.5 to 14
17
Strength to Weight: Bending, points 14 to 22
17
Thermal Diffusivity, mm2/s 94
6.2
Thermal Shock Resistance, points 3.3 to 6.1
16

Alloy Composition

Aluminum (Al), % 99.7 to 100
0
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0
17.5 to 19.5
Copper (Cu), % 0 to 0.040
0
Iron (Fe), % 0 to 0.25
73.3 to 80.8
Magnesium (Mg), % 0 to 0.030
0
Manganese (Mn), % 0 to 0.030
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 0
0 to 1.0
Niobium (Nb), % 0
0.2 to 0.8
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.030
0.2 to 0.8
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.040
0
Residuals, % 0 to 0.030
0