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380.0 Aluminum vs. AISI 409Cb Stainless Steel

380.0 aluminum belongs to the aluminum alloys classification, while AISI 409Cb stainless steel belongs to the iron alloys. There are 30 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 380.0 aluminum and the bottom bar is AISI 409Cb stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 74
190
Elongation at Break, % 3.0
24
Fatigue Strength, MPa 140
140
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
75
Shear Strength, MPa 190
270
Tensile Strength: Ultimate (UTS), MPa 320
420
Tensile Strength: Yield (Proof), MPa 160
200

Thermal Properties

Latent Heat of Fusion, J/g 510
270
Maximum Temperature: Mechanical, °C 170
710
Melting Completion (Liquidus), °C 590
1450
Melting Onset (Solidus), °C 540
1410
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 100
25
Thermal Expansion, µm/m-K 22
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 83
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
8.5
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 7.5
2.2
Embodied Energy, MJ/kg 140
31
Embodied Water, L/kg 1040
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.0
83
Resilience: Unit (Modulus of Resilience), kJ/m3 170
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 48
25
Strength to Weight: Axial, points 31
15
Strength to Weight: Bending, points 36
16
Thermal Diffusivity, mm2/s 40
6.7
Thermal Shock Resistance, points 14
15

Alloy Composition

Aluminum (Al), % 79.6 to 89.5
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
10.5 to 11.7
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 0 to 2.0
84.9 to 89.5
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 1.0
Nickel (Ni), % 0 to 0.5
0 to 0.5
Niobium (Nb), % 0
0 to 0.75
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 7.5 to 9.5
0 to 1.0
Sulfur (S), % 0
0 to 0.040
Tin (Sn), % 0 to 0.35
0
Zinc (Zn), % 0 to 3.0
0
Residuals, % 0 to 0.5
0