High-Strength Aluminum Alloy Bolts

600 MPa-class aluminium bolts, cold-headed from 7xxx alloy for lightweight structural joints.

Key specifications

Material6061-T6 Aluminum Alloy
Installationtorque wrench set from aluminium allowables
StandardGB/T 228.1 (tensile test), GB/T 3191
Typical substratelightweight structural joints
Key inspectionstensile strength, hardness, coating

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Product overviewOverview

Aluminium bolt strength is set by alloy system and temper, and it is worth being precise: 6061-T6 reaches about 290–310 MPa tensile and 240–275 MPa yield, which is medium strength. A 600 MPa class requires a 7xxx alloy such as 7075-T6 (roughly 540–570 MPa tensile) or a modified composition with a tailored ageing treatment. The headline figure is a property of that alloy and temper, not of cold heading alone.

Material: 6061-T6 Aluminum Alloy. It is tightened with a torque wrench.

Key featuresFeatures

600 MPa class achieved with 7xxx alloy and T6 ageing, not with 6061.
About one third the density of steel for the same volume.
Lower modulus means greater extension at a given preload; torque must be recalculated.
Anodising or coating suppresses galvanic corrosion at steel interfaces.

Typical applicationsApplications

EV lightweight structures
Drone and aerospace non-primary structure
Rail interior and equipment frames

Selection notesSelection

Calculate preload from aluminium allowables; steel torque values crush threads and bearing faces.

Frequently asked questionsFAQ

How do I specify the High-Strength Aluminum Alloy Bolts?

Calculate preload from aluminium allowables; steel torque values crush threads and bearing faces. Material: 6061-T6 Aluminum Alloy. It is tightened with a torque wrench.

What matters during installation of the High-Strength Aluminum Alloy Bolts?

Set the wrench from the allowable preload of the aluminium member, not from the steel bolt rating. 600 MPa class achieved with 7xxx alloy and T6 ageing, not with 6061.

Specifications

Material	6061-T6 Aluminum Alloy
Standard	GB/T 228.1 (tensile test), GB/T 3191
Installation	torque wrench set from aluminium allowables
Typical substrate	lightweight structural joints
Key inspections	tensile strength, hardness, coating

Manufacturing and inspection

Tensile strength, yield strength and elongation by GB/T 228.1.We recommend a pilot assembly at the actual torque and mating part before locking the process parameters for volume.