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4145 Aluminum vs. ASTM B522 Class II

4145 aluminum belongs to the aluminum alloys classification, while ASTM B522 class II belongs to the otherwise unclassified metals. There are 22 material properties with values for both materials. Properties with values for just one material (10, 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 4145 aluminum and the bottom bar is ASTM B522 class II.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
96
Elongation at Break, % 2.2
1.1 to 28
Poisson's Ratio 0.33
0.41
Shear Modulus, GPa 28
34
Shear Strength, MPa 69
180 to 280
Tensile Strength: Ultimate (UTS), MPa 120
280 to 490
Tensile Strength: Yield (Proof), MPa 68
120 to 210

Thermal Properties

Latent Heat of Fusion, J/g 540
77
Melting Completion (Liquidus), °C 590
1030
Melting Onset (Solidus), °C 520
1030
Specific Heat Capacity, J/kg-K 880
160
Thermal Expansion, µm/m-K 21
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
11
Electrical Conductivity: Equal Weight (Specific), % IACS 84
5.7

Otherwise Unclassified Properties

Density, g/cm3 2.8
17

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
4.4 to 63
Resilience: Unit (Modulus of Resilience), kJ/m3 31
75 to 230
Stiffness to Weight: Axial, points 14
3.1
Stiffness to Weight: Bending, points 50
8.9
Strength to Weight: Axial, points 12
4.4 to 7.8
Strength to Weight: Bending, points 19
5.5 to 8.0
Thermal Shock Resistance, points 5.5
13 to 24

Alloy Composition

Aluminum (Al), % 83 to 87.4
0
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 3.3 to 4.7
0
Gold (Au), % 0
68.5 to 69.5
Iron (Fe), % 0 to 0.8
0
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0
Platinum (Pt), % 0
5.5 to 6.5
Silicon (Si), % 9.3 to 10.7
0
Silver (Ag), % 0
24.5 to 25.5
Sulfur (S), % 0
0 to 0.010
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0
0 to 0.26