3105-H18 Aluminum alloy,Aluminum 3105-H18 alloy,E FORU

### **Aluminum 3105-H18 Alloy Product Introduction** **Aluminum 3105-H18** is a strain-hardened aluminum-manganese alloy in the full-hard temper condition, representing the highest strength level achievable in the 3105 alloy series through cold working. This temper offers maximum strength and hardness while maintaining good corrosion resistance, making it suitable for applications where superior mechanical properties are paramount. --- #### **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** combine to provide maximum solid solution strengthening - **Optimized chemistry** for ultimate strain hardening response - **Controlled impurities** 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** | 155 W/m·K (107 BTU·in/hr·ft²·°F) | | **Electrical Conductivity** | 40% IACS | | **Coefficient of Thermal Expansion** | 23.6 × 10⁻⁶/°C (20-100°C) | | **Specific Heat Capacity** | 900 J/kg·K | --- #### **3. Mechanical Properties** The H18 temper provides full-hard characteristics with maximum strength: * **Tensile Ultimate Strength:** 185 - 225 MPa (27 - 33 ksi) * **Tensile Yield Strength (0.2% Offset):** 165 - 205 MPa (24 - 30 ksi) * **Elongation:** 2 - 5% (in 2 inches) * **Shear Strength:** 115 MPa (17 ksi) * **Fatigue Strength:** 75 MPa (11 ksi) * **Brinell Hardness:** 48 - 58 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-H18 is used in applications requiring maximum strength: * **Building & Construction:** - High-strength roofing panels - Structural building components - Heavy-duty architectural panels - Industrial flooring * **Transportation:** - Heavy-duty vehicle panels - Truck body reinforcements - Structural trailer components - Container structural members * **Industrial Applications:** - High-strength machinery components - Equipment structural parts - Industrial cabinets and enclosures - Material handling equipment * **Consumer Durables:** - High-strength appliance panels - Heavy-duty furniture components - Reinforced consumer products --- #### **6. Key Advantages** * **Maximum Strength:** Highest mechanical properties in 3105 alloy series * **Superior Hardness:** Excellent surface durability and wear resistance * **High Stiffness:** Outstanding dimensional stability under heavy loads * **Good Corrosion Resistance:** Maintains good corrosion performance * **Excellent Strength-to-Weight Ratio:** Superior load-bearing capability * **Thermal Performance:** Suitable for heat transfer 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 sharp tools and proper techniques * **Strain Hardening:** Represents maximum practical cold working level * **Annealing:** 345°C (650°F) for 2-3 hours for complete softening * **Springback:** Significant springback requires compensation in tooling --- #### **8. Corrosion Performance** * **Atmospheric Corrosion:** Excellent * **Marine Environment:** Good * **Stress Corrosion Cracking:** Good Resistance * **Pitting Resistance:** Good * **Industrial Atmospheres:** Good Resistance --- #### **9. Technical Specifications** * H18 temper indicates maximum strain hardening * 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 edge cracking --- #### **10. Quality Assurance** * Consistent chemical composition * Uniform mechanical properties * Strict quality control standards * Good dimensional stability * Traceability and certification available **Conclusion** Aluminum 3105-H18 represents the ultimate in strength achievement for the 3105 alloy system through cold working processes. While offering limited formability compared to lower tempers, it provides maximum mechanical properties for applications where strength and hardness are primary requirements. The alloy maintains good corrosion resistance and offers a cost-effective alternative to more expensive high-strength aluminum alloys. 3105-H18 serves as an economical solution for situations demanding maximum cold-worked strength within the aluminum-manganese alloy system, particularly in structural and heavy-duty applications where high 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 1708 gallon liquid totes Special package is available on request.