ThePipingMart Blog Grades Aluminium 4047 Alloy (UNS A94047) – Composition, Properties, and Uses

Aluminium 4047 Alloy (UNS A94047) – Composition, Properties, and Uses

Aluminium 4047

UNS A94047 is an alloy often used for applications requiring high levels of resistance to corrosion, heat, and mechanical stress. This particular alloy contains a combination of aluminium, manganese, magnesium, silicon, and zinc. This post will explore the composition, physical and mechanical properties, uses, corrosion resistance, heat resistance, heat treatments, machining, and welding of aluminum 4047.

4047 Aluminium Composition

Aluminium 4047 contains 4% manganese (Mn), 0.7% magnesium (Mg), 0.4% silicon (Si), and 0.15% zinc (Zn). The remainder is aluminium (Al).

Element Content (%)
Silicon, Si 11-13
Iron, Fe 0.80 max
Copper, Cu 0.30 max
Zinc, Zn 0.20 max
Manganese, Mn 0.15 max
Magnesium, Mg 0.10 max
Remainder (each) 0.05
Remainder (total) 0.15
Aluminum, Al Remainder

4047 Aluminium Physical Properties

Grade 4047 has excellent ductility and strength at both low and high temperatures. It also has a good electrical conductivity compared to other alloys in its class. The strength of this alloy can be improved by cold working or heat treatment.

Properties Metric Imperial
Density 2.6 g/cm3 0.096 lb/in3

4047 Aluminium Mechanical Properties

Alloy 4047 is an aluminium alloy that is characterized by its strength and high heat resistance. This alloy is often used in a variety of industrial applications, due to its unique mechanical properties. Primarily, Aluminum 4047 boasts impressive tensile strength, meaning that it can be safely manipulated and formed into various shapes without the risk of failure or breakage. Furthermore, Aluminium 4047 has particularly high resistance to fatigue and stress cracking, making it highly suitable for prolonged use in extreme temperatures or pressures. It is clear why this type of aluminum alloy is so widely utilized – ultimately, Aluminium 4047 offers exceptional structural consistency with minimal maintenance requirements.

4047 Aluminium Equivalent

  • A5.10 (ER & R).

4047 Aluminium Thermal Properties

Thermal Properties Metric English Comments
Melting Point 577 – 582 °C 1070 – 1080 °F
Solidus 577 °C 1070 °F
Liquidus 582 °C 1080 °F

4047 Aluminium Uses

AL 4047 is commonly used for parts such as engine components, aircraft structural components and automotive parts that need superior corrosion resistance as well as good formability and weldability in corrosive environments. It is also used to make fuel tanks because it has excellent corrosion resistance in acidic environments such as gasoline or diesel fuel.

Corrosion Resistance

This alloy has excellent corrosion resistance in many different environments including marine atmospheres where saltwater is present. It also has good weldability, which means it can be joined easily with no need for extra welding procedures or materials like fluxes or fillers.

Heat Resistance

Aluminium 4047 has good thermal stability, which means it can withstand high temperatures without losing its properties or becoming brittle over time. It also retains its strength at high temperatures, which makes it suitable for use in automotive applications where elevated temperatures are encountered frequently, such as exhaust systems or catalytic converters where temperatures can reach up to 1000°C/1832°F.

Heat Treatment

This alloy can be treated using conventional methods like solution treatment followed by quenching or age-hardening processes if increased strength is required for specific applications like aerospace components where extremely high tensile strengths are needed.

Machining & Welding

Aluminum 4047 can be machined using conventional methods like sawing, cutting, drilling etc. Still, care should be taken when welding this alloy because it may crack due to the presence of higher amounts of manganese, which makes the material susceptible to hot cracking during welding processes if proper preheating is not done before welding begins.


In conclusion, aluminium 4047 is a versatile alloy with many desirable properties, including excellent corrosion resistance, good formability, weldability, mechanical strength at both low and high temperatures, thermal stability, and good electrical conductivity, making it suitable for many different applications such as engine components aircraft structural components automotive parts fuel tanks etc

Furthermore, its machinability can be improved through heat treatment processes, while its weldability requires careful consideration of preheating before welding begins to prevent any potential hot cracking during the process. With these features, aluminum 4047 is an ideal choice for many industries requiring reliable performance from their materials.

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