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380.0 Aluminum vs. AISI 440A Stainless Steel

380.0 aluminum belongs to the aluminum alloys classification, while AISI 440A stainless steel belongs to the iron alloys. There are 29 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 380.0 aluminum and the bottom bar is AISI 440A stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 74
200
Elongation at Break, % 3.0
5.0 to 20
Fatigue Strength, MPa 140
270 to 790
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
77
Shear Strength, MPa 190
450 to 1040
Tensile Strength: Ultimate (UTS), MPa 320
730 to 1790
Tensile Strength: Yield (Proof), MPa 160
420 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 510
280
Maximum Temperature: Mechanical, °C 170
760
Melting Completion (Liquidus), °C 590
1480
Melting Onset (Solidus), °C 540
1370
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 100
23
Thermal Expansion, µm/m-K 22
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 83
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.0
Density, g/cm3 2.9
7.7
Embodied Carbon, kg CO2/kg material 7.5
2.2
Embodied Energy, MJ/kg 140
31
Embodied Water, L/kg 1040
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.0
87 to 120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 48
25
Strength to Weight: Axial, points 31
26 to 65
Strength to Weight: Bending, points 36
23 to 43
Thermal Diffusivity, mm2/s 40
6.2
Thermal Shock Resistance, points 14
26 to 65

Alloy Composition

Aluminum (Al), % 79.6 to 89.5
0
Carbon (C), % 0
0.6 to 0.75
Chromium (Cr), % 0
16 to 18
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 0 to 2.0
78.4 to 83.4
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 0 to 0.5
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 7.5 to 9.5
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 0 to 0.35
0
Zinc (Zn), % 0 to 3.0
0
Residuals, % 0 to 0.5
0