Aluminum 2618 Alloy | Aerospace Forgings & High-Temp Use

Aluminum 2618 is a high-strength, heat-treatable aluminum alloy primarily used in aerospace and high-temperature applications where strength, toughness, and resistance to thermal fatigue are critical. The alloy contains copper, magnesium, iron, and nickel, which contribute to its excellent mechanical performance at elevated temperatures compared to general-purpose aluminum alloys.

This alloy is most commonly supplied in forged forms, including closed-die forgings, rings, and structural components, and is widely used in aerospace, defense, and high-performance engineering environments. Aluminum 2618 maintains good strength retention at temperatures where many other aluminum alloys begin to lose mechanical integrity.

Due to its alloying composition, 2618 Aluminum offers lower corrosion resistance than non-heat-treatable or magnesium-based aluminum alloys. As a result, it is typically used in controlled environments or with protective finishes where required.

Tech Steel & Materials supplies Aluminum 2618 to aerospace specifications with full material traceability, certifications, and inspection documentation to meet demanding engineering and regulatory requirements.

FAQ

Is Aluminum 2618 weldable?

2618 Aluminum is generally not recommended for welding. The alloy’s high copper content makes it susceptible to hot cracking and a reduction in mechanical properties in the heat-affected zone. When joining is required, mechanical fastening or alternative design approaches are typically preferred.

What is Aluminum 2618 commonly used for?

Aluminum 2618 is commonly used in aerospace forgings, high-performance structural components, and applications requiring good strength retention at elevated temperatures, such as aircraft engine and propulsion-related parts.

Is Aluminum 2618 heat treatable?

Yes. Aluminum 2618 is a heat-treatable alloy and is typically supplied in tempers such as T61 or T6, depending on the governing material specification and application requirements.

Does Aluminum 2618 have a UNS number?

Yes. The UNS designation for Aluminum 2618 is UNS A92618.

How does Aluminum 2618 compare to Aluminum 2024?

While both are high-strength aluminum alloys, Aluminum 2618 offers better strength retention at elevated temperatures, whereas Aluminum 2024 is more commonly used for sheet, plate, and general aerospace structural applications where temperature exposure is lower.

Select AMS

AMS Number	Alloy	Type	UNS	Cross Ref. Spec	Misc./Shape
AMS 4132	2618	Aluminum	A92618	ASTM E 1417	Forging

Aluminum 2618

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