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772.0 Aluminum vs. AISI 415 Stainless Steel

772.0 aluminum belongs to the aluminum alloys classification, while AISI 415 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, 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 772.0 aluminum and the bottom bar is AISI 415 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 6.3 to 8.4
17
Fatigue Strength, MPa 94 to 160
430
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
76
Tensile Strength: Ultimate (UTS), MPa 260 to 320
900
Tensile Strength: Yield (Proof), MPa 220 to 250
700

Thermal Properties

Latent Heat of Fusion, J/g 380
270
Maximum Temperature: Mechanical, °C 180
780
Melting Completion (Liquidus), °C 630
1450
Melting Onset (Solidus), °C 580
1400
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 150
24
Thermal Expansion, µm/m-K 24
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 110
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.0
2.5
Embodied Energy, MJ/kg 150
35
Embodied Water, L/kg 1140
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 25
140
Resilience: Unit (Modulus of Resilience), kJ/m3 350 to 430
1250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 25 to 31
32
Strength to Weight: Bending, points 31 to 36
26
Thermal Diffusivity, mm2/s 58
6.4
Thermal Shock Resistance, points 11 to 14
33

Alloy Composition

Aluminum (Al), % 91.2 to 93.2
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0.060 to 0.2
11.5 to 14
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.15
77.8 to 84
Magnesium (Mg), % 0.6 to 0.8
0
Manganese (Mn), % 0 to 0.1
0.5 to 1.0
Molybdenum (Mo), % 0
0.5 to 1.0
Nickel (Ni), % 0
3.5 to 5.5
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.15
0 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0.1 to 0.2
0
Zinc (Zn), % 6.0 to 7.0
0
Residuals, % 0 to 0.15
0