Aluminum 4045 Alloy (UNS A94045)

Topics Covered

Chemical Composition
Physical Properties
Thermal Properties
Other Designations


Aluminium / aluminum alloys are a mixture of aluminium / aluminum in combination with one of these elements – copper, manganese, silicon, magnesium, and zinc.

Aluminium alloys possess varying levels of strength and durability, due to the components present in the specific alloy and also because of heat treatments and manufacturing processes. Aluminium / aluminum 4045 alloy is a wrought alloy type with good corrosion.

The following datasheet will provide more details about aluminium / aluminum 4045 alloy.

Chemical Composition

The following table shows the chemical composition of aluminium / aluminum 4045 alloy.

Element Content (%)
Aluminum, Al 87.3 - 91
Silicon, Si 9-11
Iron, Fe ≤ 0.80
Copper, Cu ≤ 0.30
Titanium, Ti ≤ 0.20
Zinc, Zn ≤ 0.10
Magnesium, Mg ≤ 0.050
Manganese, Mn ≤ 0.050
Remainder (each) ≤ 0.050
Remainder (total) ≤ 0.15

Physical Properties

The physical properties of aluminium / aluminum 4045 alloy are outlined in the following table.

Properties Metric Imperial
Density 2.67 g/cm3 0.0965 lb/in3
Melting point 574-599°C 1065-1110°F

Thermal Properties

The thermal properties of aluminium / aluminum 4045 alloy are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 21.1 µm/m°C 11.7 µin/in°F
Thermal conductivity 171 W/mK 1190 BTU in/hr.ft².°F

Other Designations

Equivalent material to the aluminium / aluminum 4045 alloy is EN 573 AW-AlSi10.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Your comment type