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AISI 434 Stainless Steel vs. 7108 Aluminum

AISI 434 stainless steel belongs to the iron alloys classification, while 7108 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 AISI 434 stainless steel and the bottom bar is 7108 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 24
11
Fatigue Strength, MPa 220
120
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
26
Shear Strength, MPa 330
210
Tensile Strength: Ultimate (UTS), MPa 520
350
Tensile Strength: Yield (Proof), MPa 320
290

Thermal Properties

Latent Heat of Fusion, J/g 280
380
Maximum Temperature: Mechanical, °C 880
210
Melting Completion (Liquidus), °C 1510
630
Melting Onset (Solidus), °C 1430
530
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 25
150
Thermal Expansion, µm/m-K 10
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
39
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 7.7
2.9
Embodied Carbon, kg CO2/kg material 2.4
8.3
Embodied Energy, MJ/kg 33
150
Embodied Water, L/kg 120
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
38
Resilience: Unit (Modulus of Resilience), kJ/m3 260
620
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 19
34
Strength to Weight: Bending, points 18
38
Thermal Diffusivity, mm2/s 6.7
59
Thermal Shock Resistance, points 19
16

Alloy Composition

Aluminum (Al), % 0
92.4 to 94.7
Carbon (C), % 0 to 0.12
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 78.6 to 83.3
0 to 0.1
Magnesium (Mg), % 0
0.7 to 1.4
Manganese (Mn), % 0 to 1.0
0 to 0.050
Molybdenum (Mo), % 0.75 to 1.3
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.050
Zinc (Zn), % 0
4.5 to 5.5
Zirconium (Zr), % 0
0.12 to 0.25
Residuals, % 0
0 to 0.15