Key Characteristics of 1100H18 Aluminum Plate

1100H18 aluminum plate, a representative product in the 1-series pure aluminum alloy family, is widely used in decorative, industrial, and daily-use fields due to its outstanding comprehensive performance. As a high-purity aluminum material with strict temper control, it has unique characteristics that make it stand out among many aluminum alloys. Below is a detailed introduction to the core characteristics of 1100H18 aluminum plate, with insights from Henan Mingtai Aluminum Co, Ltd. (stock code: 601877)—a professional aluminum processor with over 20 years of experience in producing 1100H18 aluminum plate.​

1. High Purity: The Foundation of Stable Performance​

1100H18 aluminum plate is defined by its high aluminum content—with a minimum purity of 99.0%, and even up to 99.6% in high-grade products. This high purity brings two key advantages:​

●Minimal Impurity Interference: The low content of impurities (such as iron, silicon, and copper, all ≤0.25%) avoids the formation of brittle intermetallic compounds. This ensures the aluminum plate maintains uniform mechanical properties across its entire surface, without local weaknesses caused by impurities—critical for applications requiring consistent performance, like decorative aluminum-plastic panel substrates.​

●Excellent Chemical Stability: High-purity aluminum is less likely to react with external substances (e.g., moisture, mild chemicals). This lays the foundation for the aluminum plate’s corrosion resistance, making it suitable for both indoor and outdoor environments. Mingtai Aluminum strictly controls the purity of 1100H18 aluminum plate during smelting, using advanced online detection equipment to ensure each batch meets the 99.0%+ purity standard.​

2. Optimized Mechanical Properties: Balancing Strength and Formability​

The “H18” temper of 1100 aluminum plate is achieved through full strain hardening, resulting in mechanical properties tailored for practical applications:​

●Moderate Tensile Strength: 1100H18 aluminum plate has a tensile strength of 170-210 MPa, which is 30-40% higher than the annealed (O) temper of 1100 aluminum. This strength is sufficient to withstand the stress of processing (e.g., stamping, bending) and daily use, such as supporting the structure of decorative panels without deformation.​

●Controlled Ductility: While strain-hardened, 1100H18 still retains good ductility, with an elongation rate of 3-5%. This balance allows it to be bent into small radii (e.g., 1.5 times the plate thickness) without cracking—essential for forming complex shapes like curved decorative aluminum-plastic panels. Mingtai’s precise temper control (via computer-controlled cold rolling mills) ensures every roll of 1100H18 aluminum plate has consistent tensile strength and elongation, with performance deviations ≤5%.​

3. Superior Surface Quality: Ideal for Aesthetic and Coating Applications​

1100H18 aluminum plate excels in surface quality, making it a top choice for decorative and coating-related scenarios:​

Smooth and Defect-Free Surface: After precision rolling and tension bending straightening (using Mingtai’s advanced CVC 6-roller cold rolling mills and cleaning lines), 1100H18 aluminum plate has a surface roughness (Ra) of ≤0.4μm. It has no oil stains, pinholes, scratches, or oxide spots—providing a flat, smooth base for painting, laminating, or printing. For example, when used as a decorative aluminum-plastic panel substrate, its surface can perfectly adhere to color films or coatings, ensuring uniform color and no peeling.​

Uniform Thickness Tolerance: The thickness tolerance of 1100H18 aluminum plate is strictly controlled within ±0.02mm. This uniformity prevents uneven stress during processing, avoiding warping of finished products (e.g., decorative panels) and ensuring consistent appearance across large batches.​

4. Strong Corrosion Resistance: Suitable for Long-Term Outdoor Use​

Unlike low-purity aluminum or alloyed aluminum with poor corrosion resistance, 1100H18 aluminum plate has excellent anti-corrosion performance:​

Natural Oxide Layer Protection: When exposed to air, 1100H18 aluminum plate quickly forms a dense, self-repairing aluminum oxide layer (about 5-10nm thick) on its surface. This layer is insoluble in water and resistant to most mild acids and alkalis, effectively isolating the aluminum matrix from moisture, oxygen, and pollutants. In outdoor environments (e.g., building exterior decorative panels), it can resist rain, UV radiation, and urban smog, maintaining its appearance and structure for 10+ years without rust or fading.​

No Additional Anti-Corrosion Treatments Needed: For general applications, 1100H18 aluminum plate does not require expensive anti-corrosion coatings (e.g., galvanizing). This reduces production costs while avoiding potential environmental pollution from coating processes—aligning with green manufacturing trends. Mingtai’s 1100H18 aluminum plate has passed 1000-hour salt spray tests, with no obvious corrosion or weight loss.​

5. Good Thermal and Electrical Conductivity: Expanding Application Scenarios​

Thanks to its high purity, 1100H18 aluminum plate has excellent thermal and electrical conductivity:​

Thermal Conductivity: Its thermal conductivity reaches 220 W/(m·K), which is about 60% that of copper. This makes it suitable for heat dissipation components, such as small heat sinks for electronic devices or heat transfer plates for household appliances.​

Electrical Conductivity: With an electrical conductivity of ≥55% IACS (International Annealed Copper Standard), it can be used in low-voltage electrical components (e.g., terminal blocks, conductive sheets) where high conductivity is required but weight needs to be controlled.​

Mingtai Aluminum: Ensuring the Premium Characteristics of 1100H18 Aluminum Plate​

Mingtai Aluminum, relying on its domestic first “1+4” hot rolling line, recycled aluminum comprehensive utilization production line, and professional technical team (600+ personnel), ensures that every 1100H18 aluminum plate maintains the above premium characteristics:​

●Raw Material Control: Uses high-quality primary aluminum ingots and recycled aluminum (with harmless treatment) to ensure raw material purity.​

●Precision Processing: Adopts CVC cold rolling mills and automatic annealing furnaces to control thickness, temper, and surface quality with high precision.​

●Strict Inspection: Conducts 100% inspection of each batch (purity, mechanical properties, surface defects) to eliminate non-conforming products.​

Contact Mingtai for High-Quality 1100H18 Aluminum Plate​

If you need 1100H18 aluminum plate with stable characteristics for decorative, industrial, or electronic applications, Mingtai Aluminum is your reliable partner.​

Email: sales@mingtai-al.com​

Whatsapp/Wechat: +86-17760728273​

Website: www.mingtaialminum.com

We can provide samples and technical data sheets to help you fully understand the characteristics of 1100H18 aluminum plate and match it to your application needs!