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7049 Aluminum vs. EN 1.4913 Stainless Steel

7049 aluminum belongs to the aluminum alloys classification, while EN 1.4913 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 7049 aluminum and the bottom bar is EN 1.4913 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 6.2 to 7.0
14 to 22
Fatigue Strength, MPa 160 to 170
320 to 480
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 27
75
Shear Strength, MPa 300 to 310
550 to 590
Tensile Strength: Ultimate (UTS), MPa 510 to 530
870 to 980
Tensile Strength: Yield (Proof), MPa 420 to 450
480 to 850

Thermal Properties

Latent Heat of Fusion, J/g 370
270
Maximum Temperature: Mechanical, °C 180
700
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 480
1410
Specific Heat Capacity, J/kg-K 860
480
Thermal Conductivity, W/m-K 130
24
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 110
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.0
Density, g/cm3 3.1
7.8
Embodied Carbon, kg CO2/kg material 8.1
2.9
Embodied Energy, MJ/kg 140
41
Embodied Water, L/kg 1110
97

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
130 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
600 to 1860
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 46 to 47
31 to 35
Strength to Weight: Bending, points 46 to 47
26 to 28
Thermal Diffusivity, mm2/s 51
6.5
Thermal Shock Resistance, points 22 to 23
31 to 34

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0 to 0.020
Boron (B), % 0
0 to 0.0015
Carbon (C), % 0
0.17 to 0.23
Chromium (Cr), % 0.1 to 0.22
10 to 11.5
Copper (Cu), % 1.2 to 1.9
0
Iron (Fe), % 0 to 0.35
84.5 to 88.3
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
0.4 to 0.9
Molybdenum (Mo), % 0
0.5 to 0.8
Nickel (Ni), % 0
0.2 to 0.6
Niobium (Nb), % 0
0.25 to 0.55
Nitrogen (N), % 0
0.050 to 0.1
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.25
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.1
0
Vanadium (V), % 0
0.1 to 0.3
Zinc (Zn), % 7.2 to 8.2
0
Residuals, % 0 to 0.15
0