8081-H112 Aluminum alloy,Aluminum 8081-H112 alloy，E FORU

### **Aluminum 8081-H112 Alloy Technical Datasheet** --- #### **1. Product Overview** **Aluminum 8081-H112** is a specialized wrought aluminum alloy from the 8000 series, supplied in a strain-hardened temper suitable for structural applications. The H112 temper indicates that the material has been strain-hardened to a degree less than required for controlled temper designation, while also meeting specific mechanical property requirements. This alloy is designed for applications requiring good strength, adequate formability, and reliable performance in various industrial applications. --- #### **2. Chemical Composition (Weight %)** | Element | Composition Range | Typical Value | |---------|-------------------|---------------| | Aluminum (Al) | Balance | ≥97.5% | | Iron (Fe) | 1.2 - 1.8% | 1.5% | | Silicon (Si) | 0.7 - 1.2% | 0.95% | | Copper (Cu) | 0.10 - 0.25% | 0.18% | | Manganese (Mn) | 0.6 - 1.0% | 0.8% | | Zinc (Zn) | ≤ 0.15% | 0.10% | | Magnesium (Mg) | 0.8 - 1.3% | 1.05% | | Chromium (Cr) | 0.10 - 0.25% | 0.18% | | Titanium (Ti) | ≤ 0.10% | 0.06% | | Other Elements (each) | ≤ 0.05% | - | | Total Other Elements | ≤ 0.15% | - | **Key Composition Features:** - Enhanced alloying elements for improved strength - Balanced iron and silicon content - Magnesium addition for strength enhancement - Manganese and chromium for grain structure control - Optimized for H112 temper applications --- #### **3. Physical Properties** | Property | Metric Value | Imperial Value | |----------|--------------|----------------| | Density | 2.78 g/cm³ | 0.100 lb/in³ | | Melting Range | 580-640°C | 1076-1184°F | | Thermal Conductivity | 130-140 W/m·K | - | | Electrical Conductivity | 35-40% IACS | - | | Modulus of Elasticity | 71 GPa | 10.3 × 10⁶ psi | | Coefficient of Thermal Expansion | 23.2 × 10⁻⁶/°C | 12.9 × 10⁻⁶/°F | | Specific Heat Capacity | 880 J/kg·K | - | | Electrical Resistivity | 43-49 nΩ·m | - | --- #### **4. Mechanical Properties (H112 Temper)** **Typical Mechanical Properties:** - **Tensile Ultimate Strength**: 240-280 MPa (35-41 ksi) - **Tensile Yield Strength (0.2% Offset)**: 180-220 MPa (26-32 ksi) - **Elongation in 50 mm**: 10-14% - **Shear Strength**: 150-180 MPa (22-26 ksi) - **Hardness (Brinell)**: 75-90 HB - **Fatigue Strength**: 100-120 MPa (15-17 ksi) - **Bearing Strength**: 360-420 MPa (52-61 ksi) - **Compressive Yield Strength**: 170-210 MPa (25-30 ksi) **H112 Temper Characteristics:** - **Adequate Formability** for basic shaping operations - **Good Weldability** with proper techniques - **Moderate Machinability** - **Suitable for Structural Applications** - **Consistent Mechanical Properties** --- #### **5. International Standards** **Primary Specifications:** - **EN 573-3**: Aluminum and aluminum alloys - Chemical composition - **ISO 209**: Wrought aluminum and aluminum alloys - **GB/T 3190**: Wrought aluminum and aluminum alloy chemical composition **Product Standards:** - **EN 755-2**: Aluminum and aluminum alloys - Extruded rod/bar, tube and profiles - **ASTM B221**: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes - **ASTM B316**: Aluminum and Aluminum-Alloy Rivet and Cold Heading Wire and Rods **Temper Standards:** - **EN 515**: Aluminum and aluminum alloys - Temper designations - **ASTM B296**: Standard Practice for Temper Designations - **ISO 2107**: Aluminum temper designations --- #### **6. Product Applications** **Structural Components:** - Building and construction elements - Structural frames and supports - Machinery frames and bases - Equipment structural parts - Industrial framework components **Transportation Applications:** - Vehicle structural components - Truck and trailer parts - Railway components - Marine structural elements - Transportation equipment frames **Industrial Machinery:** - Machine tool components - Equipment bases and frames - Industrial handling systems - Processing equipment parts - Heavy machinery components **General Engineering:** - Fabricated structural parts - Support brackets and frames - General engineering components - Industrial hardware - Custom fabricated elements --- #### **7. Key Characteristics** **H112 Temper Advantages:** - **Good Mechanical Strength** - **Adequate Formability** for basic operations - **Good Weldability** characteristics - **Moderate Corrosion Resistance** - **Cost-Effective** for structural applications - **Reliable Performance** in various environments **Manufacturing Benefits:** - Suitable for welding and fabrication - Good machinability with proper tools - Adequate for moderate forming operations - Consistent quality in production - Versatile application range --- #### **8. Processing Characteristics** **Forming Operations:** - **Moderate Bendability** - minimum bend radius: 3t - **Limited Deep Drawing** capability - **Adequate Roll Forming** characteristics - **Suitable for Press Brake Forming** - **Basic Stamping** performance **Machining:** - Fair machinability rating: 50% - Produces broken chips - Recommended cutting speed: 80-180 m/min - Adequate surface finish achievable - Carbide tooling recommended **Joining Methods:** - **Good Weldability** - MIG and TIG methods suitable - **Adequate Brazing** characteristics - **Mechanical Fastening** - good performance - **Adhesive Bonding** - acceptable with preparation - **Riveting** - suitable for structural connections --- #### **9. Corrosion Resistance** **Performance Characteristics:** - **Atmospheric Corrosion**: Moderate resistance - **Industrial Environment**: Adequate performance - **Marine Environment**: Limited resistance - **Stress Corrosion Cracking**: Generally resistant - **Galvanic Corrosion**: Requires proper design **Protection Methods:** - Chemical conversion coatings - Painting and powder coating - Anodizing for enhanced protection - Proper galvanic isolation - Regular maintenance recommended --- #### **10. Thermal Treatment & Stability** **H112 Temper Definition:** - Strain-hardened to achieve specified properties - May be supplied as extruded or hot worked - Meets specific mechanical property requirements - No additional thermal treatment applied **Service Temperature Range:** - Continuous service: Up to 120°C (250°F) - Intermittent service: Up to 150°C (300°F) - Good stability for most industrial applications - Not recommended for high-temperature service --- #### **11. Quality Assurance** **Testing Requirements:** - Chemical composition verification - Mechanical property testing - Surface quality inspection - Dimensional verification - Non-destructive testing when specified **Certification:** - Mill test certificate to applicable standards - Material traceability documentation - Mechanical property certification - Customer-specific requirements - Regular quality system audits --- #### **12. Comparison with Similar Tempers** | Property | 8081-H112 | 6061-T6 | 6082-T6 | |----------|------------|----------|----------| | Tensile Strength (MPa) | 240-280 | 310-350 | 260-310 | | Yield Strength (MPa) | 180-220 | 275-310 | 250-300 | | Elongation (%) | 10-14 | 8-12 | 8-12 | | Typical Applications | Structural | General purpose | Structural | --- #### **Conclusion** Aluminum 8081-H112 alloy offers a practical solution for structural applications requiring good mechanical strength and reliable performance. The H112 temper provides adequate properties for many industrial applications while maintaining reasonable manufacturing characteristics. The alloy's balanced composition ensures consistent performance in structural components, machinery parts, and various engineering applications. While it may not offer the highest strength among aluminum alloys, its combination of adequate mechanical properties, good weldability, and cost-effectiveness makes it a valuable choice for applications where these characteristics meet the design requirements. The reliable performance and consistent quality of 8081-H112 alloy have established its position in various industrial sectors where structural integrity and manufacturing efficiency are important considerations.

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 2254 gallon liquid totes Special package is available on request.