Product Center · High-strength Aluminum Alloy S

High-Strength Aluminum Sleeve 2

Aluminium sleeve with an insulated outside diameter, used where a steel bolt must not make contact with a dissimilar structure.

Key specifications

Material6061-T6 Aluminum Alloy
Installationbolt passes through the sleeve for spacing
StandardGB/T 3191 (aluminium bar), customer drawing
Typical substratebattery packs and lightweight structures
Key inspectionsbore, length, compressive load

Request a quote Request samples

Product overviewOverview

In a bolted joint the sleeve carries the compressive load and fixes the distance between the clamped parts, while keeping the bolt away from the hole wall. The galvanic pair here is aluminium against steel, and the sleeve is often the only separation between them. Anodic oxide is an insulator, but it is brittle and can be cracked by the bolt or by burrs, so the assembly has to avoid metal-to-metal contact at the edges as well as on the bore.

Material: 6061-T6 Aluminum Alloy. The bolt passes through the sleeve to set the spacing.

Key featuresFeatures

Oxide insulates only if it is not cracked during assembly.
Wall thickness sized from compressive stress rather than steel practice.
Insulation or coating at steel interfaces to suppress galvanic corrosion.
6061-T6 bar or extrusion, dimensionally stable at about one third the density of steel.

Typical applicationsApplications

Guide bushes on automation
Battery module spacing
Lightweight body structures

Selection notesSelection

Deburr the hole and chamfer the sleeve ends; a cracked oxide film at an edge is where corrosion starts, even when the bore is fully anodised.

Frequently asked questionsFAQ

Is anodising enough to stop galvanic corrosion?

It helps but is not a guarantee. The oxide is brittle and cracks at edges and under point loads, so the design should also keep water from sitting in the joint and avoid steel-to-aluminium contact at burrs.

What matters during installation of the High-Strength Aluminum Sleeve 2?

Pass the bolt through the sleeve to set the spacing. Oxide insulates only if it is not cracked during assembly.

Specifications

Material	6061-T6 Aluminum Alloy
Standard	GB/T 3191 (aluminium bar), customer drawing
Installation	bolt passes through the sleeve for spacing
Typical substrate	battery packs and lightweight structures
Key inspections	bore, length, compressive load

Manufacturing and inspection

Material is verified spectrally for 6061-T6 condition and hardness.Alternative materials and finishes can be quoted side by side during sampling, so cost and corrosion resistance can be traded off explicitly.