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7475 Aluminum vs. S30615 Stainless Steel

7475 aluminum belongs to the aluminum alloys classification, while S30615 stainless steel belongs to the iron alloys. There are 28 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 7475 aluminum and the bottom bar is S30615 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 10 to 12
39
Fatigue Strength, MPa 190 to 210
270
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
75
Shear Strength, MPa 320 to 350
470
Tensile Strength: Ultimate (UTS), MPa 530 to 590
690
Tensile Strength: Yield (Proof), MPa 440 to 520
310

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 180
960
Melting Completion (Liquidus), °C 640
1370
Melting Onset (Solidus), °C 480
1320
Specific Heat Capacity, J/kg-K 870
500
Thermal Conductivity, W/m-K 140 to 160
14
Thermal Expansion, µm/m-K 23
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
19
Density, g/cm3 3.0
7.6
Embodied Carbon, kg CO2/kg material 8.2
3.7
Embodied Energy, MJ/kg 150
53
Embodied Water, L/kg 1130
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 53 to 68
220
Resilience: Unit (Modulus of Resilience), kJ/m3 1390 to 1920
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 49 to 55
25
Strength to Weight: Bending, points 48 to 52
23
Thermal Diffusivity, mm2/s 53 to 63
3.7
Thermal Shock Resistance, points 23 to 26
16

Alloy Composition

Aluminum (Al), % 88.6 to 91.6
0.8 to 1.5
Carbon (C), % 0
0.16 to 0.24
Chromium (Cr), % 0.18 to 0.25
17 to 19.5
Copper (Cu), % 1.2 to 1.9
0
Iron (Fe), % 0 to 0.12
56.7 to 65.3
Magnesium (Mg), % 1.9 to 2.6
0
Manganese (Mn), % 0 to 0.060
0 to 2.0
Nickel (Ni), % 0
13.5 to 16
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.1
3.2 to 4.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.060
0
Zinc (Zn), % 5.1 to 6.2
0
Residuals, % 0 to 0.15
0