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308.0 Aluminum vs. AISI 434 Stainless Steel

308.0 aluminum belongs to the aluminum alloys classification, while AISI 434 stainless steel belongs to the iron alloys. There are 32 material properties with values for both materials. Properties with values for just one material (3, 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 308.0 aluminum and the bottom bar is AISI 434 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
170
Elastic (Young's, Tensile) Modulus, GPa 73
200
Elongation at Break, % 2.0
24
Fatigue Strength, MPa 89
220
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
78
Shear Strength, MPa 150
330
Tensile Strength: Ultimate (UTS), MPa 190
520
Tensile Strength: Yield (Proof), MPa 110
320

Thermal Properties

Latent Heat of Fusion, J/g 470
280
Maximum Temperature: Mechanical, °C 170
880
Melting Completion (Liquidus), °C 620
1510
Melting Onset (Solidus), °C 540
1430
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 140
25
Thermal Expansion, µm/m-K 20
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.5
Calomel Potential, mV -660
-230
Density, g/cm3 2.9
7.7
Embodied Carbon, kg CO2/kg material 7.7
2.4
Embodied Energy, MJ/kg 140
33
Embodied Water, L/kg 1080
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.3
110
Resilience: Unit (Modulus of Resilience), kJ/m3 83
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 47
25
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 25
18
Thermal Diffusivity, mm2/s 55
6.7
Thermal Shock Resistance, points 9.2
19

Alloy Composition

Aluminum (Al), % 85.7 to 91
0
Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0
16 to 18
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 0 to 1.0
78.6 to 83.3
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
0.75 to 1.3
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 5.0 to 6.0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0 to 0.5
0