6xxx Series

Aluminum Extrusions & Automotive Sheet
Heat-Treatable Structural Aluminum
Al-Mg-Si alloys for lightweight vehicle structures

6 Series Overview

6xxx alloys are heat-treatable aluminum-magnesium-silicon alloys, strengthened by Mg₂Si precipitation during ageing.

They combine medium-to-high strength, good extrudability and formability, corrosion resistance and weldability, and gain strength during paint baking. This makes them the main alloys for automotive body panels, crash structures, battery enclosures and extruded profiles.

Heat-Treatable Strength

T4, T5 and T6 tempers deliver medium-to-high strength for structural parts.

Excellent Extrudability

Complex thin-wall profiles with a good surface finish and anodizing response.

Bake-Hardening Formability

Formable in T4 temper and gains strength in the paint-bake cycle, ideal for outer panels.

6-Series Aluminum Alloys (Magnesium-Silicon Heat-Treatable Alloys)

Alloy	Temper	Standards	Core Properties	Typical Applications
6061	T4 / T6	GB/T 6892, GB/T 3191, ASTM B221, EN 755	Medium-high strength, good machinability and corrosion resistance	Structural frames, brackets, battery trays, machined parts
6063	T5 / T6	GB/T 6892, ASTM B221, EN 755	Excellent extrudability and surface finish, good anodizing response	Trim and decorative profiles, roof rails, heat sinks, window frames
6082	T6	GB/T 6892, EN 755	Highest strength in the 6xxx series, good weldability	Crash-management systems, subframes, suspension parts
6005A	T6	GB/T 6892, EN 755	Good strength with complex thin-wall profiles	Battery enclosures, side sills, rail-vehicle profiles
6016 / 6014	T4P	GB/T 3880, EN 485, OEM specifications	Excellent formability, paint-bake hardening, good hemming	Outer body panels: hoods, doors, roofs, fenders
6111	T4	ASTM B209, OEM specifications	Higher strength sheet with bake-hardening response	Outer and inner body panels

Sizes, tempers and profiles are supplied to customer drawings. Contact us with your specification.

Industry

Application scenario

6000-series aluminum alloys are the backbone of automotive lightweighting: 6016, 6014 and 6111 sheet for hoods, doors and roofs, and 6061, 6082 and 6005A extrusions for crash-management systems, subframes, side sills and battery enclosures. They are also widely used in rail vehicles, building profiles and machined industrial parts.

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