6013-T6 Round Aluminum Bar Weldable Aerospace Al-Mg-Si-Cu Alloy Higher Strength Than 6061 For Fuselage Frame Parts

6013-T6 round aluminum bar is a heat-treatable aluminum-magnesium-silicon-copper alloy engineered for welded aerospace structures that previously had to choose between weldability and strength. Compared with 6061-T6, the workhorse of the 6xxx family, 6013-T6 offers approximately 12% higher tensile strength together with better fracture toughness and fatigue performance, while retaining the forgiving welding characteristics of the 6xxx series. Designers of fuselage frames, floor structures and transport applications increasingly specify this grade when damage tolerance matters.

Material is produced with tight control of copper content and aging practice to balance strength against corrosion resistance, then straightened and inspected to aerospace drawing requirements. Bars arrive with full chemical and mechanical certification and consistent machined surface quality.

• Higher strength than 6061: tensile strength reaches approximately 395 MPa in the T6 condition with yield strength above 355 MPa.
• Weldable and repairable: joins readily with gas tungsten arc and friction stir welding, and welded zones respond to post-weld aging treatments.
• Improved fracture toughness: the optimized copper-magnesium balance delivers better resistance to crack propagation than conventional 6061.
• Good fatigue behavior: fine, uniform precipitate distribution supports long life under repeated gust and maneuver loading in aircraft structures.
• Corrosion resistant: suitable for painted aerospace assemblies and protected marine applications when correctly finished and sealed.
• Stable machined details: low residual stress bar stock holds thin web dimensions without distortion during high speed machining.
• Full aerospace documentation: each lot is supplied with chemical analysis, tensile data and heat treatment verification records.

6013-T6 round aluminum bar is specified for aircraft fuselage frames, wing ribs, floor beams, seat tracks and other welded airframe assemblies where joints must carry real load. The alloy is equally valuable in ground transport, including light rail car bodies, armored vehicle structures and truck chassis components that are welded and then heat treated or aged. Fabricators producing weldments from bar stock appreciate the alloy ability to hold tolerances through multi-pass welding with fewer distortion correction cycles.

We offer precision saw cutting, CNC machining, centerless grinding and stress relieving services for long machined components. Material can be supplied in rough mill finish for forging or in bright drawn condition for immediate automatic lathe processing. Mill certificates and optional third party ultrasonic inspection reports accompany each delivery.

Bars are protected with anti-rust oil and moisture barrier wrapping, then packed in fumigation-free plywood cases with internal cushioning to preserve straightness and surface quality during ocean freight. Every lot is verified for chemical composition, tensile properties and hardness under our ISO 9001 quality system, and special packaging for air freight is available for urgent orders. Please contact us with your required diameter, length and delivery schedule to obtain a quotation with confirmed lead time.