3105-H28 Aluminum alloy,Aluminum 3105-H28 alloy,E FORU

### **Aluminum 3105-H28 Alloy Product Introduction** **Aluminum 3105-H28** is a strain-hardened aluminum-manganese alloy that has been cold worked to a very high strength level, approaching full-hard condition. This temper offers superior mechanical properties while maintaining limited formability, making it suitable for applications requiring maximum strength within the 3105 alloy series. --- #### **1. Chemical Composition** | Element | Content (%) | | :--- | :--- | | **Manganese (Mn)** | 0.4 - 0.8 | | **Magnesium (Mg)** | 0.4 - 0.8 | | **Iron (Fe)** | 0.5 max | | **Silicon (Si)** | 0.3 max | | **Copper (Cu)** | 0.2 max | | **Zinc (Zn)** | 0.2 max | | **Other Elements** | each 0.05 max, total 0.15 max | | **Aluminum (Al)** | Balance | *Alloy Characteristics:* - **Manganese and Magnesium** provide maximum solid solution strengthening - **Optimized chemistry** for high strain hardening response - **Controlled impurity levels** ensure consistent high-strength performance - **Enhanced alloying content** for superior mechanical properties --- #### **2. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | 2.72 g/cm³ (0.098 lb/in³) | | **Melting Range** | 640 - 655 °C (1184 - 1211 °F) | | **Modulus of Elasticity** | 69 GPa (10,000 ksi) | | **Thermal Conductivity** | 152 W/m·K (105 BTU·in/hr·ft²·°F) | | **Electrical Conductivity** | 38% IACS | | **Coefficient of Thermal Expansion** | 23.6 × 10⁻⁶/°C (20-100°C) | | **Specific Heat Capacity** | 900 J/kg·K | --- #### **3. Mechanical Properties** The H28 temper provides very high strain-hardened characteristics: * **Tensile Ultimate Strength:** 180 - 220 MPa (26 - 32 ksi) * **Tensile Yield Strength (0.2% Offset):** 160 - 200 MPa (23 - 29 ksi) * **Elongation:** 3 - 7% (in 2 inches) * **Shear Strength:** 110 MPa (16 ksi) * **Fatigue Strength:** 80 MPa (12 ksi) * **Brinell Hardness:** 50 - 60 HB * **Bending Characteristics:** Limited bendability with minimum bend radius of 3-4t --- #### **4. International Standards** * **ASTM:** * **ASTM B209** - Aluminum and Aluminum-Alloy Sheet and Plate * **EN:** * **EN 573-3** - Chemical composition and form of products * **EN 485-2** - Mechanical properties * **ISO:** * **ISO 6361-2** - Wrought Aluminum and Aluminum Alloy Sheets, Strips and Plates * **JIS:** **JIS H 4000** - Aluminum and Aluminum Alloy Sheets and Plates --- #### **5. Product Applications** 3105-H28 is specified for applications requiring very high strength: * **Building & Construction:** - High-strength structural panels - Heavy-duty roofing systems - Structural support members - Industrial building components * **Transportation Industry:** - Heavy-duty vehicle components - Structural trailer parts - Container reinforcements - Automotive structural members * **Industrial Applications:** - High-strength machinery components - Equipment structural frames - Heavy-duty storage systems - Industrial platform components * **Specialized Applications:** - High-strength brackets and supports - Structural reinforcements - Heavy-duty consumer products --- #### **6. Key Advantages** * **Very High Strength:** Superior mechanical properties approaching full-hard condition * **Excellent Hardness:** Good surface durability and wear resistance * **High Stiffness:** Outstanding dimensional stability under heavy loads * **Good Corrosion Resistance:** Maintains adequate corrosion performance * **Excellent Strength-to-Weight Ratio:** Superior load-bearing capability * **Thermal Performance:** Suitable for specialized applications * **Cost-Effective:** Economical high-strength aluminum solution --- #### **7. Fabrication Characteristics** * **Welding:** Limited weldability; requires specialized techniques * **Forming:** Restricted to simple bending and minimal forming operations * **Machining:** Fair machinability; requires proper tool selection and techniques * **Strain Hardening:** Represents very high level of cold working * **Springback:** Significant springback requires compensation in tooling * **Surface Treatment:** Suitable for painting and chemical conversion coatings --- #### **8. Corrosion Performance** * **Atmospheric Corrosion:** Excellent * **Marine Environment:** Good * **Stress Corrosion Cracking:** Good Resistance * **Pitting Resistance:** Good * **Industrial Atmospheres:** Good Resistance --- #### **9. Technical Specifications** * H28 temper indicates very high strain hardening level * Suitable for service temperatures from -70°C to +150°C * Good resistance to atmospheric corrosion * Limited formability requires careful manufacturing planning * Special handling recommended to prevent cracking --- #### **10. Quality Assurance** * Consistent chemical composition * Uniform mechanical properties * Strict quality control standards * Good dimensional stability * Traceability and certification available **Conclusion** Aluminum 3105-H28 represents a very high strength level in the 3105 alloy series, offering superior mechanical properties through advanced cold working processes. While its formability is limited compared to lower tempers, it provides exceptional strength characteristics for applications where structural performance is paramount. The alloy maintains good corrosion resistance and offers a cost-effective alternative to more expensive high-strength aluminum alloys. 3105-H28 serves as an excellent solution for situations demanding very high cold-worked strength within the aluminum-manganese alloy system, particularly in structural and heavy-duty applications where maximum strength-to-weight ratio is essential.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1713 gallon liquid totes Special package is available on request.