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EN 1.4347 Stainless Steel vs. 7049A Aluminum

EN 1.4347 stainless steel belongs to the iron alloys classification, while 7049A aluminum belongs to the aluminum 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 EN 1.4347 stainless steel and the bottom bar is 7049A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 23
5.0 to 5.7
Fatigue Strength, MPa 320
180
Poisson's Ratio 0.27
0.32
Shear Modulus, GPa 79
27
Tensile Strength: Ultimate (UTS), MPa 660
580 to 590
Tensile Strength: Yield (Proof), MPa 480
500 to 530

Thermal Properties

Latent Heat of Fusion, J/g 300
370
Maximum Temperature: Mechanical, °C 1100
200
Melting Completion (Liquidus), °C 1410
640
Melting Onset (Solidus), °C 1370
430
Specific Heat Capacity, J/kg-K 490
850
Thermal Conductivity, W/m-K 15
130
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
120

Otherwise Unclassified Properties

Base Metal Price, % relative 16
10
Density, g/cm3 7.7
3.1
Embodied Carbon, kg CO2/kg material 3.1
8.2
Embodied Energy, MJ/kg 44
150
Embodied Water, L/kg 170
1100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
28 to 32
Resilience: Unit (Modulus of Resilience), kJ/m3 570
1800 to 1990
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
44
Strength to Weight: Axial, points 24
52 to 53
Strength to Weight: Bending, points 22
50 to 51
Thermal Diffusivity, mm2/s 4.0
50
Thermal Shock Resistance, points 19
25

Alloy Composition

Aluminum (Al), % 0
84.6 to 89.5
Carbon (C), % 0 to 0.050
0
Chromium (Cr), % 25 to 27
0.050 to 0.25
Copper (Cu), % 0
1.2 to 1.9
Iron (Fe), % 62.2 to 69.4
0 to 0.5
Magnesium (Mg), % 0
2.1 to 3.1
Manganese (Mn), % 0 to 1.5
0 to 0.5
Nickel (Ni), % 5.5 to 7.5
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.5
0 to 0.4
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
7.2 to 8.4
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0
0 to 0.15