Aluminum 3003-H14 Alloy Description
3003-H14 is one of the most commonly used aluminum alloys. It is based on nearly pure aluminum with the addition of manganese (approximately 1.2%), which increases its strength by about 20% compared to 1100 aluminum. This alloy is well known for its excellent corrosion resistance, outstanding formability-such as deep drawing and spinning-and good weldability. These balanced properties make it a popular choice for general fabrication applications, including roofing, cookware, wall panels, and storage tanks. The H14 temper indicates that the material has been strain-hardened (cold worked) to a half-hard condition, providing an optimal combination of strength and workability.
Aluminum 3003-H14 is a highly versatile and economical aluminum alloy known for its reliable corrosion resistance, excellent formability, and outstanding workability. It features a smooth, bright surface and is widely used in sheet metal applications due to its low weight and ease of bending, forming, and shaping. The H14 temper indicates that the alloy has been strain-hardened and partially annealed, resulting in improved strength and hardness compared to the fully annealed condition.
Product Forms Available from GNEE
GNEE provides Aluminum 3003-H14 in multiple product forms, including flat sheets and tread (diamond) plates. The standard sheet products are offered in a wide range of thicknesses and dimensions, making them ideal for general fabrication. The tread plate version features a raised diamond pattern that enhances slip resistance, making it suitable for flooring, stair treads, and other safety-focused applications.

Key Characteristics
Chemical Composition: Predominantly aluminum, with manganese (Mn) as the primary alloying element at around 1.2%
Temper-H14: "H" denotes strain hardening, while "14" represents a half-hard temper, positioned between fully annealed and full-hard states
Material Properties: Excellent resistance to corrosion, very good formability, easy welding and brazing, low weight, and cost efficiency
Strength Level: Stronger than 1100 aluminum, though it is not heat-treatable
Typical Applications
3003-H14 aluminum supplied by GNEE is commonly used in the fabrication of various sheet metal components, including panels, air ducts, enclosures, and cabinets. It is also extensively applied in the packaging industry for manufacturing food and beverage containers, as well as in the construction sector for roofing sheets and wall cladding materials. Thanks to its strong corrosion resistance, this alloy is also suitable for marine environments and chemical processing applications.
Construction: Roofing sheets, siding panels, flashing, and rainwater systems
Consumer Products: Cookware, household appliances, decorative components, and trim
Industrial Uses: Storage and fuel tanks, chemical processing equipment, ducting, and signage blanks








