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7049A Aluminum vs. S30615 Stainless Steel

7049A 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 7049A aluminum and the bottom bar is S30615 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 5.0 to 5.7
39
Fatigue Strength, MPa 180
270
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 27
75
Shear Strength, MPa 340 to 350
470
Tensile Strength: Ultimate (UTS), MPa 580 to 590
690
Tensile Strength: Yield (Proof), MPa 500 to 530
310

Thermal Properties

Latent Heat of Fusion, J/g 370
340
Maximum Temperature: Mechanical, °C 200
960
Melting Completion (Liquidus), °C 640
1370
Melting Onset (Solidus), °C 430
1320
Specific Heat Capacity, J/kg-K 850
500
Thermal Conductivity, W/m-K 130
14
Thermal Expansion, µm/m-K 24
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
19
Density, g/cm3 3.1
7.6
Embodied Carbon, kg CO2/kg material 8.2
3.7
Embodied Energy, MJ/kg 150
53
Embodied Water, L/kg 1100
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 28 to 32
220
Resilience: Unit (Modulus of Resilience), kJ/m3 1800 to 1990
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 44
25
Strength to Weight: Axial, points 52 to 53
25
Strength to Weight: Bending, points 50 to 51
23
Thermal Diffusivity, mm2/s 50
3.7
Thermal Shock Resistance, points 25
16

Alloy Composition

Aluminum (Al), % 84.6 to 89.5
0.8 to 1.5
Carbon (C), % 0
0.16 to 0.24
Chromium (Cr), % 0.050 to 0.25
17 to 19.5
Copper (Cu), % 1.2 to 1.9
0
Iron (Fe), % 0 to 0.5
56.7 to 65.3
Magnesium (Mg), % 2.1 to 3.1
0
Manganese (Mn), % 0 to 0.5
0 to 2.0
Nickel (Ni), % 0
13.5 to 16
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.4
3.2 to 4.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 7.2 to 8.4
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0