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5049 Aluminum vs. AISI 422 Stainless Steel

5049 aluminum belongs to the aluminum alloys classification, while AISI 422 stainless steel belongs to the iron alloys. There are 31 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 5049 aluminum and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 52 to 88
260 to 330
Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 2.0 to 18
15 to 17
Fatigue Strength, MPa 79 to 130
410 to 500
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
76
Shear Strength, MPa 130 to 190
560 to 660
Tensile Strength: Ultimate (UTS), MPa 210 to 330
910 to 1080
Tensile Strength: Yield (Proof), MPa 91 to 280
670 to 870

Thermal Properties

Latent Heat of Fusion, J/g 400
270
Maximum Temperature: Mechanical, °C 190
650
Melting Completion (Liquidus), °C 650
1480
Melting Onset (Solidus), °C 620
1470
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 140
24
Thermal Expansion, µm/m-K 24
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 110
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.7
7.9
Embodied Carbon, kg CO2/kg material 8.5
3.1
Embodied Energy, MJ/kg 150
44
Embodied Water, L/kg 1180
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.0 to 31
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 59 to 570
1140 to 1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 22 to 34
32 to 38
Strength to Weight: Bending, points 29 to 39
26 to 30
Thermal Diffusivity, mm2/s 56
6.4
Thermal Shock Resistance, points 9.3 to 15
33 to 39

Alloy Composition

Aluminum (Al), % 94.7 to 97.9
0
Carbon (C), % 0
0.2 to 0.25
Chromium (Cr), % 0 to 0.3
11 to 12.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.5
81.9 to 85.8
Magnesium (Mg), % 1.6 to 2.5
0
Manganese (Mn), % 0.5 to 1.1
0.5 to 1.0
Molybdenum (Mo), % 0
0.9 to 1.3
Nickel (Ni), % 0
0.5 to 1.0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0