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771.0 Aluminum vs. EN 1.4123 Stainless Steel

771.0 aluminum belongs to the aluminum alloys classification, while EN 1.4123 stainless steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, 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 771.0 aluminum and the bottom bar is EN 1.4123 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 85 to 120
220 to 250
Elastic (Young's, Tensile) Modulus, GPa 70
200
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 250 to 370
720 to 810

Thermal Properties

Latent Heat of Fusion, J/g 380
280
Maximum Temperature: Mechanical, °C 180
840
Melting Completion (Liquidus), °C 630
1450
Melting Onset (Solidus), °C 620
1410
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 140 to 150
23
Thermal Expansion, µm/m-K 24
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 82
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 3.0
7.7
Embodied Carbon, kg CO2/kg material 8.0
4.2
Embodied Energy, MJ/kg 150
62
Embodied Water, L/kg 1130
120

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 23 to 35
26 to 29
Strength to Weight: Bending, points 29 to 39
23 to 25
Thermal Diffusivity, mm2/s 54 to 58
6.3
Thermal Shock Resistance, points 11 to 16
26 to 29

Alloy Composition

Aluminum (Al), % 90.5 to 92.5
0
Carbon (C), % 0
0.35 to 0.5
Chromium (Cr), % 0.060 to 0.2
14 to 16.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.15
76.7 to 84.6
Magnesium (Mg), % 0.8 to 1.0
0
Manganese (Mn), % 0 to 0.1
0 to 1.0
Molybdenum (Mo), % 0
1.0 to 2.5
Nickel (Ni), % 0
0 to 0.5
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.15
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0.1 to 0.2
0
Vanadium (V), % 0
0 to 1.5
Zinc (Zn), % 6.5 to 7.5
0
Residuals, % 0 to 0.15
0