6061C

6061C is a material designation that appears in some supplier catalogs for a variant of the aluminum alloy 6061. It is not part of the Aluminum Association’s official 6061 designation and is not associated with a formally defined temper in standard materials catalogs. As such, 6061C can refer to different processing, coating, or stock conditions depending on the supplier, and its properties are not standardized across manufacturers.

6061 is an aluminum-magnesium-silicon alloy known for good strength, weldability, and corrosion resistance. In standard practice, the alloy is supplied in tempers such as O (annealed), T4, T6, or T651, which define heat treatment and work hardening. 6061C, however, does not correspond to a recognized temper in common standards, and any reported mechanical properties should be treated as specific to a supplier’s version rather than universal.

If 6061C is encountered in documentation or a purchase order, it is important to obtain the material data sheet and a certificate of conformity from the supplier, and to verify composition, temper, heat treatment, coatings, and surface finish. Machinability and weldability will generally be consistent with 6061, but coatings or additional processing can alter characteristics.

Applications of 6061-class alloys include extruded profiles, automotive and aerospace components, bicycle frames, and structural fabrications. While 6061C may be offered for similar forms, users should confirm compatibility with design requirements and standards before use.