01Applications
Solar racking
Rails, clamps and brackets for roof, carport and ground systems. Solar profiles.
EV battery structures
Multi-hollow side members, cross members and tray frames that protect cells and carry crash loads.
Scooters, bicycles & skates
Decks, stems, frame tubes and skate frames in 6061, 7005 and 7075. Mobility & sports profiles.
Charging infrastructure
Housings, posts and heat sinks for AC and DC chargers.
02Structural profiles need documented properties
Structural parts are designed from guaranteed minimum properties, so every lot ships with material certificates showing chemical composition and, where specified, tensile results. Temper is confirmed by hardness checks after aging.
Multi-hollow crash and battery profiles concentrate stiffness where loads travel. Their internal webs are designed with the die in mind — web thickness, node radii and cavity count all affect extrudability and cost.
03Automotive programmes
CharMax is certified to IATF 16949:2016, the automotive quality management standard, alongside ISO 9001 and ISO 14001. Automotive profiles are produced under that system from billets we cast ourselves from primary aluminum. Tell us your PPAP level and customer-specific requirements at RFQ stage. See our certifications.
04Frequently asked questions
Which aluminum alloys are used for EV battery trays?
Extruded battery-tray members are typically 6000-series alloys such as 6061, 6082 and 6005A in T6 temper, chosen for strength, crash behaviour and weldability. The exact grade follows the vehicle maker's specification.
Why use aluminum extrusions for solar racking?
Aluminum rails are light to handle on roofs, resist corrosion without painting, and can integrate clamp channels and feet slots in one section. Anodizing extends outdoor life further.
What alloy is best for e-bike frame tubes?
6061-T6 is the common choice for its strength, weldability and fatigue behaviour. Frames are usually welded and then re-heat-treated to restore strength in the welded zones.
Last updated September 17, 2026 · Reviewed by the CharMax Aluminum engineering team