Aluminum 4043 Alloy (UNS A94043)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


Aluminium / aluminum is found as a part of over 270 different minerals, making it the third most abundantly available element in the Earth’s crust.

Aluminium / aluminum alloys are used in several components and the list is increasing every year. Aluminium / aluminum 4043 alloy is a wrought alloy type with good corrosion resistance.

The following datasheet will provide more details about aluminium / aluminum 4043 alloy.

Chemical Composition

The following table shows the chemical composition of aluminium / aluminum 4043 alloy.

Element Content (%)
Aluminum, Al 94.8
Silicon, Si 5.20

Physical Properties

The physical properties of aluminium / aluminum 4043 alloy are outlined in the following table.

Properties Metric Imperial
Density 2.69 g/cm3 0.0972 lb/in3

Mechanical Properties

The mechanical properties of aluminium / aluminum 4043 alloy are tabulated below.

Properties Metric Imperial
Tensile strength 145 MPa 21000 psi
Yield strength (@diameter 12.7 mm/0.500 in) 70 MPa 10200 psi
Poisson’s ratio 0.34 0.34
Elongation at break (@diameter 12.7 mm/0.500 in) 22% 22%
Shear strength 90 MPa 13100 psi
Hardness, Brinell (@load 500 kg; thickness 10.0 mm/1100 lb) 39 39

Thermal Properties

The thermal properties of aluminium / aluminum 4043 alloy are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (average over 20-100°C/68-212°F) 22.1 µm/m°C 12.3 µin/in°F
Thermal conductivity 163 W/mK 1130 BTU in/hr.ft².°F

Other Designations

Equivalent materials to the aluminium / aluminum 4043 alloy are listed below:

  • BS N21
  • MIL-W-6712
  • Alcan GB-33S
  • Duricilium-FD
  • Star-Si-050
  • AWCO-45

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