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7049 Aluminum vs. EN 1.4525 Stainless Steel

7049 aluminum belongs to the aluminum alloys classification, while EN 1.4525 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 7049 aluminum and the bottom bar is EN 1.4525 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 6.2 to 7.0
5.6 to 13
Fatigue Strength, MPa 160 to 170
480 to 540
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 27
76
Tensile Strength: Ultimate (UTS), MPa 510 to 530
1030 to 1250
Tensile Strength: Yield (Proof), MPa 420 to 450
840 to 1120

Thermal Properties

Latent Heat of Fusion, J/g 370
280
Maximum Temperature: Mechanical, °C 180
860
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 480
1390
Specific Heat Capacity, J/kg-K 860
480
Thermal Conductivity, W/m-K 130
18
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 8.1
2.8
Embodied Energy, MJ/kg 140
39
Embodied Water, L/kg 1110
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
68 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
1820 to 3230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 46 to 47
36 to 45
Strength to Weight: Bending, points 46 to 47
29 to 33
Thermal Diffusivity, mm2/s 51
4.7
Thermal Shock Resistance, points 22 to 23
34 to 41

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0.1 to 0.22
15 to 17
Copper (Cu), % 1.2 to 1.9
2.5 to 4.0
Iron (Fe), % 0 to 0.35
70.4 to 79
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.8
Nickel (Ni), % 0
3.5 to 5.5
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.25
0 to 0.8
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 7.2 to 8.2
0
Residuals, % 0 to 0.15
0

Comparable Variants