1050 aluminium sheet is the most widely used 1-series industrial pure aluminum on the market, with an aluminum content of ≥99.5%. It is widely used in decoration, hardware, heat dissipation, and construction due to its excellent thermal and electrical conductivity, corrosion resistance, and lightweight properties. 1050 H14 and 1050 H24 are its two most commonly used states.
I. Core Process Differences
1050 H14 aluminum: Employs an "intermediate annealing + cold rolling hardening" process, increasing hardness and strength only through cold working, without subsequent annealing, resulting in a purely work-hardened state. The internal stress of the aluminum is fully preserved, the grain structure is compact, and the overall rigidity is stronger, but the toughness margin is limited.
Aluminum 1050 H24: Employs a "large reduction cold rolling + partial annealing" process, first increasing strength through a larger reduction in cold rolling, then releasing residual internal stress through low-temperature partial annealing. Compared to H14, it balances hardened strength and forming toughness, resulting in better dimensional stability and less deformation after processing.
II. Core Performance Comparison
The two aluminum materials have identical basic properties (electrical conductivity, thermal conductivity, corrosion resistance). 1-series pure aluminum contains no alloying elements, and their acid and alkali resistance and oxidation resistance are comparable. The core differences lie in their mechanical properties and processing performance.
1. Strength and Hardness: H14 has slightly better rigidity, while H24 has more balanced overall strength.
1050 H14 has a tensile strength range of 95-135MPa, with relatively high overall hardness, excellent resistance to dents and deformation, and better static load-bearing stability. 1050 H24 has a tensile strength of 95-145MPa, slightly higher than H14. After stress release, its strength stability is stronger, and it is less prone to natural deformation over long-term use.
2. Toughness and Formability: H24 is superior in all aspects.
This is the most crucial performance difference between the two. 1050 H14 is too rigid and lacks toughness, making it slightly brittle. It only supports simple straight bending and flat cutting. When bending with small radius angles, deep drawing, or processing complex shapes, it is prone to cracking and excessive springback, resulting in a low processing tolerance.
1050 H24, on the other hand, undergoes partial annealing and tempering, resulting in a much higher elongation than H14. It exhibits excellent bending, stretching, and sheet metal performance, easily handling curved bends, deep drawing, curtain wall edge bending, and complex surface processing. Furthermore, it has minimal springback after processing and higher dimensional accuracy, making it the preferred choice for sheet metal forming.
3. Stability: H24 has stronger resistance to deformation.
H14 has concentrated internal residual stress, making it prone to stress release deformation after subsequent cutting, drilling, and splicing. H24 releases most of its internal stress earlier, resulting in excellent dimensional stability and a very low probability of deformation after processing, making it suitable for high-precision forming workpieces.
III. Application Scenarios Differences
Due to the performance differences, the two aluminum materials have highly divergent application scenarios. Precise matching is essential to balance performance and cost.
1050 H14 Application Scenarios: Primarily characterized by high rigidity and flatness, requiring no complex forming processes, mainly for flat, simple-cut, and straight components. Core applications include billboards, signs, general decorative panels, simple appliance covers, heat dissipation plates, and assembly line pads. These scenarios do not require bending or shaping, but demand high flatness and static hardness of the sheet material, which H14 fully meets.
1050 H24 Application Scenarios: Primarily characterized by excellent formability and dimensional stability, suitable for all processing scenarios requiring secondary shaping. Core applications include building curtain wall panels, exterior wall decorative bending parts, chassis and cabinet shells, automotive interior stamping parts, precision sheet metal parts, radiator stretching components, and food and chemical equipment parts. For applications involving bending, deep drawing, curved surface forming, and high-precision machining, H24 is the preferred choice.
IV. Market Price Difference: H24 is slightly more expensive than H14.
Under the premise of the same thickness, specifications, and purity, there is a slight price difference between the two aluminum materials. The 1050 H14 process is simple, requiring no secondary annealing, resulting in higher production efficiency, lower costs, and a more affordable market price.
The 1050 H24 process involves an additional partial annealing and tempering step, making the production process more complex, requiring higher yield control standards, and increasing overall production costs. Its market price is approximately 3%-8% higher than the same specification H14. Although the price is slightly higher, the forming and processing losses are extremely low. For complex-shaped workpieces, this actually reduces rework costs, resulting in a higher overall cost-effectiveness.