6009-T4 Aluminum alloy,Aluminum 6009-T4 alloy,E FORU

### **Product Introduction: 6009-T4 Aluminum Alloy** **6009-T4 Aluminum Alloy** is a heat-treatable aluminum-magnesium-silicon (Al-Mg-Si) alloy specifically engineered for automotive body sheet applications. The T4 temper (solution heat-treated and naturally aged) provides an optimal combination of high formability for manufacturing complex shapes and the ability to develop significant strength during subsequent paint-bake cycles. This alloy is particularly valued in the automotive industry for its excellent deep-drawing characteristics, surface quality, and bake-hardening response. --- ### **1. International Standards** 6009-T4 Aluminum Alloy is recognized under the following international standards: - **AA (Aluminum Association, USA):** AA 6009, Temper T4 - **UNS (Unified Numbering System):** UNS A96009 - **ISO (International Organization for Standardization):** AlMg0.5Si - T4 - **EN (European Norm):** EN AW-6009 - T4 - **ASTM:** ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) --- ### **2. Chemical Composition** The chemical composition limits (in weight percentage) for the base 6009 alloy are: | Element | Content (%) | |:---------|:------------| | **Aluminum (Al)** | Balance | | **Silicon (Si)** | 0.60 - 1.0 | | **Magnesium (Mg)** | 0.40 - 0.8 | | **Manganese (Mn)** | 0.20 - 0.6 | | **Copper (Cu)** | 0.15 - 0.40 | | **Iron (Fe)** | ≤ 0.35 | | **Chromium (Cr)** | ≤ 0.20 | | **Zinc (Zn)** | ≤ 0.10 | | **Titanium (Ti)** | ≤ 0.10 | | **Others (each)** | ≤ 0.05 | | **Others (total)** | ≤ 0.15 | **Key Takeaway:** The carefully balanced chemistry with controlled copper content (0.15-0.40%) enhances the bake-hardening response while maintaining good corrosion resistance. The manganese content improves strength and formability. --- ### **3. Physical Properties** The typical physical properties of 6009-T4 aluminum alloy are: | Property | Metric Value | Imperial Value | |:----------|:-------------|:---------------| | **Density** | 2.70 g/cm³ | 0.0975 lb/in³ | | **Melting Range** | 615 - 655 °C | 1140 - 1210 °F | | **Coefficient of Thermal Expansion** | 23.4 × 10⁻⁶/°C (20-100°C) | 13.0 × 10⁻⁶/°F (68-212°F) | | **Thermal Conductivity** | 172 - 190 W/m·K | 995 - 1100 BTU·in/(hr·ft²·°F) | | **Electrical Conductivity** | 45-50% IACS | 45-50% IACS | | **Modulus of Elasticity** | 69 GPa | 10,000 ksi | | **Shear Modulus** | 26 GPa | 3,770 ksi | --- ### **4. Mechanical Properties (T4 Temper)** The T4 temper condition provides specific mechanical properties ideal for forming operations: **As-Received (T4 Temper):** - **Tensile Strength:** 195 - 240 MPa (28 - 35 ksi) - **Yield Strength (0.2% Offset):** 110 - 150 MPa (16 - 22 ksi) - **Elongation (% in 50mm):** 20-25% - **Strain-Hardening Exponent (n-value):** 0.22 - 0.25 - **Plastic Strain Ratio (r-value):** 0.60 - 0.70 **After Paint-Bake Cycle** (typical 185°C/365°F for 30 minutes): - **Yield Strength Increase:** 70 - 100 MPa (10 - 15 ksi) - **Final Yield Strength:** 180 - 250 MPa (26 - 36 ksi) --- ### **5. Product Applications** 6009-T4 is primarily used in automotive applications requiring complex forming: - **Automotive Body Panels:** - Door outer panels - Hood outer panels - Trunk lids - Quarter panels - Roof panels - **Structural Components:** - Body-in-white applications - Seat cross-members - Bracket components - **Applications Requiring:** - Complex deep-draw operations - High surface quality requirements - Subsequent paint-bake strengthening --- ### **6. Key Characteristics & Advantages** - **Excellent Formability:** The T4 condition provides outstanding deep-drawing and stretch-forming capabilities, allowing for manufacturing of complex automotive panels with reduced springback. - **Superior Bake-Hardening Response:** Demonstrates significant strength increase (70-100 MPa yield strength boost) during automotive paint-bake cycles, achieving final strength comparable to higher-strength alloys. - **Good Surface Quality:** Produces excellent surface finish for class-A automotive body panels, suitable for high-quality painting and coating. - **Enhanced Hemming Performance:** Exhibits excellent edge-hemming characteristics without cracking or orange-peel effect. - **Good Corrosion Resistance:** Maintains adequate corrosion resistance for automotive applications, with performance enhanced by appropriate coating systems. - **Weight Reduction Capability:** Enables lightweight automotive designs while maintaining structural integrity and dent resistance. - **Weldability:** Can be readily spot-welded using standard automotive welding parameters with good nugget formation. --- ### **7. Processing Characteristics** **Heat Treatment Cycle:** - Solution Heat Treatment: 525-550°C (975-1020°F) - Quenching: Rapid cooling to room temperature - Natural Aging: Several days at room temperature to stabilize T4 properties **Forming Recommendations:** - Optimal formability achieved within 24-72 hours after solution heat treatment - Requires adequate lubrication for severe forming operations - Suitable for deep-drawing, stretch-forming, and bending operations - Springback characteristics are predictable and manageable **Painting and Baking:** - Standard automotive paint-bake cycles: 165-185°C (330-365°F) for 20-40 minutes - Peak strength development occurs within standard paint cure parameters In summary, **6009-T4 Aluminum Alloy** represents a specialized automotive body sheet material that delivers an exceptional balance between formability in the manufacturing state and final strength after painting. Its engineered chemistry and T4 temper condition make it ideally suited for producing complex automotive body panels that require sophisticated forming operations while achieving necessary structural performance through the bake-hardening phenomenon.

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 1952 gallon liquid totes Special package is available on request.