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7003 Aluminum vs. EN 1.4945 Stainless Steel

7003 aluminum belongs to the aluminum alloys classification, while EN 1.4945 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 7003 aluminum and the bottom bar is EN 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 11
19 to 34
Fatigue Strength, MPa 130 to 150
230 to 350
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 210 to 230
430 to 460
Tensile Strength: Ultimate (UTS), MPa 350 to 390
640 to 740
Tensile Strength: Yield (Proof), MPa 300 to 310
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 380
290
Maximum Temperature: Mechanical, °C 200
920
Melting Completion (Liquidus), °C 630
1490
Melting Onset (Solidus), °C 510
1440
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 150
14
Thermal Expansion, µm/m-K 24
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 110
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
30
Density, g/cm3 2.9
8.1
Embodied Carbon, kg CO2/kg material 8.1
5.0
Embodied Energy, MJ/kg 150
73
Embodied Water, L/kg 1140
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 41
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 630 to 710
210 to 760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 33 to 37
22 to 25
Strength to Weight: Bending, points 37 to 40
20 to 22
Thermal Diffusivity, mm2/s 59
3.7
Thermal Shock Resistance, points 15 to 17
14 to 16

Alloy Composition

Aluminum (Al), % 90.6 to 94.5
0
Carbon (C), % 0
0.040 to 0.1
Chromium (Cr), % 0 to 0.2
15.5 to 17.5
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.35
57.9 to 65.7
Magnesium (Mg), % 0.5 to 1.0
0
Manganese (Mn), % 0 to 0.3
0 to 1.5
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0
0.060 to 0.14
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.3
0.3 to 0.6
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.2
0
Tungsten (W), % 0
2.5 to 3.5
Zinc (Zn), % 5.0 to 6.5
0
Zirconium (Zr), % 0.050 to 0.25
0
Residuals, % 0 to 0.15
0