ThePipingMart Blog Grades Aluminium 4015 Alloy (UNS A94015) – Composition, Properties, Uses

Aluminium 4015 Alloy (UNS A94015) – Composition, Properties, Uses

Aluminium 4015

UNS A94015 is a wrought alloy that is widely used for its strength, corrosion resistance, and heat resistance. It is often used in the automotive and aerospace industries due to its high strength-to-weight ratio and low cost. In this article, we’ll take a closer look at the composition, mechanical properties, physical properties, uses, corrosion resistance, heat resistance, heat treatment processes, machining techniques and welding methods associated with Aluminium 4015.


UNS A94015 is composed of more than 99% aluminium and less than 1% copper. It also contains small amounts of manganese and titanium, which give it increased strength and durability. Other elements such as iron may be present in trace amounts depending on the application of the alloy.

Element Content (%)
Silicon, Si 1.40 – 2.20
Iron, Fe 0.70 max
Manganese, Mn 0.60 – 1.20
Zinc, Zn 0.20 max
Copper, Cu 0.20 max
Magnesium, Mg 0.10 – 0.50
Aluminum, Al Remainder

Mechanical Properties

4015 Aluminium has excellent tensile strength (550 MPa) and yield strength (450 MPa). Its elongation rate is about 8%, meaning it can stretch up to 8 times its original length before breaking. This makes it ideal for applications where flexibility is important such as automotive parts or aircraft components.

Properties Metric Imperial
Tensile strength 160-200 MPa 23206 psi
Elongation 3% 3%

Physical Properties

4015 aluminium has a 2.7 g/cm3 density, making it lightweight yet strong. It also has good electrical conductivity (about 60% that of copper), making it suitable for electrical components or wiring applications. In addition, Aluminum 4015 has excellent thermal conductivity, which helps dissipate heat quickly from parts exposed to high temperatures or rapid heating/cooling cycles.

Properties Metric Imperial
Density 2.72 g/cm3 0.098 lb/in3
Melting point 600°C 1112°F

Thermal Properties

Properties Metric Imperial
Thermal conductivity 150-200 W/mK 1040-1386 BTU in/hr.ft².°F


Grade 4015 can be used in a variety of applications due to its combination of low cost and high strength-to-weight ratio. It can be found in automotive parts such as wheels, suspension components or engine blocks; aircraft components such as landing gear struts; medical equipment such as surgical instruments; food processing equipment; construction materials; and many other applications where low weight and superior strength are desired.

Corrosion Resistance

Alloy 4015 has good corrosion resistance when exposed to normal atmospheric surroundings but may only be suitable for use in salt water environments or highly acidic atmospheres with additional protective coatings or treatments being applied first.

Heat Resistance

UNS A94015 can withstand temperatures up to 500°C without any significant loss of strength or other properties making it suitable for use in a range of high temperature applications including aerospace components that are subject to intense aerodynamic friction heating during flight operations as well as automotive parts that are exposed to extreme engine temperatures while operating at full speed on the roadways.

Heat Treatment

To further increase its strength beyond what is achieved through cold working alone, Aluminium 4015 may be subjected to certain heat treatment processes such as annealing or solution hardening which involve exposing it to specific temperature ranges for predetermined periods of time before cooling down again slowly so that the desired results are achieved without compromising other properties such as ductility or malleability.


In conclusion, aluminium4015 offers several advantages over other metals thanks mainly to its combination of lightness coupled with superior strength-to-weight ratio along with good corrosion resistance and overall toughness when subjected to extreme conditions either naturally occurring on land or airborne while travelling at speeds upwards of Mach 1 (the speed of sound). Its versatility means that it can be used across many different industries from aerospace engineering where lightweight yet robust components are needed all the way through medical science where precise surgical instruments require both durability along with flexibility when performing intricate procedures involving delicate tissues within the human body itself! With all these benefits combined into one single alloy type there’s no wonder why aluminium4015 remains so popular today!    While machining techniques & welding methods must always be done carefully given their propensity towards creating hazardous conditions if performed incorrectly – knowing how best to utilise these processes alongside aluminium401 5’s natural properties will ensure you get maximum benefit from every application you encounter! Thanks for reading & happy building!

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