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7129 Aluminum vs. EN 1.4805 Stainless Steel

7129 Aluminum belongs to the aluminum alloys classification, while EN 1.4805 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, 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 7129 Aluminum and the bottom bar is EN 1.4805 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 9.0 to 9.1
9.0
Fatigue Strength, MPa 150 to 190
130
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 430
490
Tensile Strength: Yield (Proof), MPa 380 to 390
250

Thermal Properties

Latent Heat of Fusion, J/g 380
310
Maximum Temperature: Mechanical, °C 180
1000
Melting Completion (Liquidus), °C 630
1390
Melting Onset (Solidus), °C 510
1350
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 150
14
Thermal Expansion, µm/m-K 24
16

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
26
Density, g/cm3 2.9
7.9
Embodied Carbon, kg CO2/kg material 8.3
4.7
Embodied Energy, MJ/kg 150
66
Embodied Water, L/kg 1150
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 38
37
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1090
150
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 41
17
Strength to Weight: Bending, points 43 to 44
18
Thermal Diffusivity, mm2/s 58
3.7
Thermal Shock Resistance, points 19
11

Alloy Composition

Aluminum (Al), % 91 to 94
0
Carbon (C), % 0
0.2 to 0.5
Chromium (Cr), % 0 to 0.1
19 to 23
Copper (Cu), % 0.5 to 0.9
0
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
44.9 to 56.8
Magnesium (Mg), % 1.3 to 2.0
0
Manganese (Mn), % 0 to 0.1
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
23 to 27
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.15
1.0 to 2.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.050
0
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 4.2 to 5.2
0
Residuals, % 0 to 0.15
0