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7175 Aluminum vs. EN 1.4594 Stainless Steel

7175 aluminum belongs to the aluminum alloys classification, while EN 1.4594 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 7175 aluminum and the bottom bar is EN 1.4594 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 3.8 to 5.9
11 to 17
Fatigue Strength, MPa 150 to 180
490 to 620
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
76
Shear Strength, MPa 290 to 330
620 to 700
Tensile Strength: Ultimate (UTS), MPa 520 to 570
1020 to 1170
Tensile Strength: Yield (Proof), MPa 430 to 490
810 to 1140

Thermal Properties

Latent Heat of Fusion, J/g 380
280
Maximum Temperature: Mechanical, °C 180
820
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 480
1410
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 140
16
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 99
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
15
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.2
3.2
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1130
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 29
110 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 1310 to 1730
1660 to 3320
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 48 to 52
36 to 41
Strength to Weight: Bending, points 48 to 51
29 to 31
Thermal Diffusivity, mm2/s 53
4.4
Thermal Shock Resistance, points 23 to 25
34 to 39

Alloy Composition

Aluminum (Al), % 88 to 91.4
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0.18 to 0.28
13 to 15
Copper (Cu), % 1.2 to 2.0
1.2 to 2.0
Iron (Fe), % 0 to 0.2
72.6 to 79.5
Magnesium (Mg), % 2.1 to 2.9
0
Manganese (Mn), % 0 to 0.1
0 to 1.0
Molybdenum (Mo), % 0
1.2 to 2.0
Nickel (Ni), % 0
5.0 to 6.0
Niobium (Nb), % 0
0.15 to 0.6
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.15
0 to 0.7
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 5.1 to 6.1
0
Residuals, % 0 to 0.15
0