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705.0 Aluminum vs. S32906 Stainless Steel

705.0 aluminum belongs to the aluminum alloys classification, while S32906 stainless steel belongs to the iron 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 705.0 aluminum and the bottom bar is S32906 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 62 to 65
270
Elastic (Young's, Tensile) Modulus, GPa 69
210
Elongation at Break, % 8.4 to 10
28
Fatigue Strength, MPa 63 to 98
460
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
81
Tensile Strength: Ultimate (UTS), MPa 240 to 260
850
Tensile Strength: Yield (Proof), MPa 130
620

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 180
1100
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 610
1380
Specific Heat Capacity, J/kg-K 890
480
Thermal Conductivity, W/m-K 140
13
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
20
Density, g/cm3 2.8
7.7
Embodied Carbon, kg CO2/kg material 8.4
3.7
Embodied Energy, MJ/kg 150
52
Embodied Water, L/kg 1170
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 20
220
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 130
950
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 24 to 26
30
Strength to Weight: Bending, points 31 to 32
26
Thermal Diffusivity, mm2/s 55
3.6
Thermal Shock Resistance, points 11
23

Alloy Composition

Aluminum (Al), % 92.3 to 98.6
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.4
28 to 30
Copper (Cu), % 0 to 0.2
0 to 0.8
Iron (Fe), % 0 to 0.8
56.6 to 63.6
Magnesium (Mg), % 1.4 to 1.8
0
Manganese (Mn), % 0 to 0.6
0.8 to 1.5
Molybdenum (Mo), % 0
1.5 to 2.6
Nickel (Ni), % 0
5.8 to 7.5
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.2
0 to 0.5
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 3.3
0
Residuals, % 0 to 0.15
0