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705.0 Aluminum vs. AISI 434 Stainless Steel

705.0 aluminum belongs to the aluminum alloys classification, while AISI 434 stainless steel belongs to the iron alloys. There are 30 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 705.0 aluminum and the bottom bar is AISI 434 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 62 to 65
170
Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 8.4 to 10
24
Fatigue Strength, MPa 63 to 98
220
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
78
Tensile Strength: Ultimate (UTS), MPa 240 to 260
520
Tensile Strength: Yield (Proof), MPa 130
320

Thermal Properties

Latent Heat of Fusion, J/g 390
280
Maximum Temperature: Mechanical, °C 180
880
Melting Completion (Liquidus), °C 640
1510
Melting Onset (Solidus), °C 610
1430
Specific Heat Capacity, J/kg-K 890
480
Thermal Conductivity, W/m-K 140
25
Thermal Expansion, µm/m-K 24
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.8
7.7
Embodied Carbon, kg CO2/kg material 8.4
2.4
Embodied Energy, MJ/kg 150
33
Embodied Water, L/kg 1170
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 20
110
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 130
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 24 to 26
19
Strength to Weight: Bending, points 31 to 32
18
Thermal Diffusivity, mm2/s 55
6.7
Thermal Shock Resistance, points 11
19

Alloy Composition

Aluminum (Al), % 92.3 to 98.6
0
Carbon (C), % 0
0 to 0.12
Chromium (Cr), % 0 to 0.4
16 to 18
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.8
78.6 to 83.3
Magnesium (Mg), % 1.4 to 1.8
0
Manganese (Mn), % 0 to 0.6
0 to 1.0
Molybdenum (Mo), % 0
0.75 to 1.3
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 1.0
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