5083-H116; 5083-H321 Aluminum alloy,Aluminum 5083-H116; 5083-H321 alloy,E FORU

### **Technical Datasheet: 5083-H116 / 5083-H321 Aluminum Alloy** --- #### **1. Material Overview** **5083-H116** and **5083-H321** are high-strength strain-hardened tempers of the aluminum-magnesium alloy 5083, specifically developed for superior corrosion resistance in marine environments. Both tempers offer enhanced resistance to stress corrosion cracking (SCC) compared to standard H32/H34 tempers, with H116 typically applied to thinner gauges and H321 to thicker plates. --- #### **2. Chemical Composition (Weight %)** | Element | Content (%) | Role in the Alloy | |---------|-------------|-------------------| | Al | Balance | Base metal | | Mg | 4.0-4.9 | Primary strengthening element | | Mn | 0.40-1.0 | Grain refinement and strength | | Cr | 0.05-0.25 | Stress corrosion resistance | | Cu | ≤0.10 | Impurity control | | Fe | ≤0.40 | Impurity control | | Si | ≤0.40 | Impurity control | | Zn | ≤0.25 | Impurity control | | Ti | ≤0.15 | Grain refinement | | Others (each) | ≤0.05 | - | | Others (total) | ≤0.15 | - | --- #### **3. Physical Properties** | Property | Value | Test Standard | |----------|-------|---------------| | Density | 2.66 g/cm³ | ASTM B193 | | Melting Range | 590-640 °C | - | | Electrical Conductivity | 29-34% IACS | ASTM B193 | | Thermal Conductivity | 117-127 W/m·K | ASTM E1461 | | Coefficient of Thermal Expansion | 23.8 × 10⁻⁶/K (20-100°C) | ASTM E228 | | Modulus of Elasticity | 70.0 GPa | ASTM E111 | | Specific Heat Capacity | 900 J/kg·K | - | --- #### **4. Mechanical Properties (Typical)** | Property | 5083-H116 | 5083-H321 | Test Standard | |----------|-----------|-----------|---------------| | Tensile Strength (MPa) | 305-355 | 315-365 | ASTM B557 | | Yield Strength (MPa) | 215-265 | 230-280 | ASTM B557 | | Elongation (%) | 10-16 | 12-18 | ASTM B557 | | Hardness (HB) | 85-100 | 90-105 | ASTM E10 | | Shear Strength (MPa) | 185-205 | 190-210 | ASTM B831 | --- #### **5. Key Characteristics** - **Superior Stress Corrosion Cracking Resistance**: Specially processed to resist SCC - **Excellent Marine Corrosion Resistance**: Outstanding performance in seawater - **High Strength**: Enhanced mechanical properties - **Good Weldability**: Maintains properties in welded condition - **Cryogenic Toughness**: Excellent low-temperature performance - **Stable Microstructure**: Controlled grain structure for reliability --- #### **6. Processing Characteristics** **Forming Operations:** - Good for moderate bending and forming - Suitable for cold working operations - Can be machined using standard methods - Moderate springback requiring compensation **Joining Methods:** - GTAW (TIG) - Excellent with 5183/5356 filler - GMAW (MIG) - Excellent results - Friction stir welding - Very good - Plasma welding - Suitable - Mechanical fastening - Excellent **Surface Treatments:** - Anodizing - Very good results - Chemical conversion - Excellent - Painting - Good adhesion - Powder coating - Excellent finish - Thermal spraying - Suitable --- #### **7. Product Applications** **Marine & Naval:** - Ship hulls and superstructures - Naval vessel components - Offshore platform structures - Submarine pressure hulls **Transportation:** - Railway carriage bodies - Heavy truck components - Special vehicle structures - Transport container bodies **Cryogenic Applications:** - LNG storage tanks - Cryogenic vessels - Low-temperature containers - Space vehicle components **Structural Engineering:** - Bridge components - Offshore structures - Heavy construction equipment - Industrial platforms --- #### **8. Available Forms & Sizes** **5083-H116:** - Sheet: 3mm to 12mm thickness - Plate: 6mm to 50mm thickness **5083-H321:** - Plate: 12mm to 150mm thickness - Heavy plate: Up to 200mm thickness --- #### **9. International Standards** | Standard Organization | H116 Designation | H321 Designation | |----------------------|------------------|------------------| | Aluminum Association | AA 5083-H116 | AA 5083-H321 | | ASTM International | ASTM B209-5083H116 | ASTM B209-5083H321 | | EN Standard | EN AW-5083-H116 | EN AW-5083-H321 | | ISO Standard | AlMg4.5Mn0.7-H116 | AlMg4.5Mn0.7-H321 | | JIS Standard | A5083-H116 | A5083-H321 | --- #### **10. Special Properties** - **Stress Corrosion Performance**: Meets ASTM B928 requirements - **Weld Quality**: Excellent HAZ properties - **Fracture Toughness**: High resistance to crack propagation - **Fatigue Performance**: Good for dynamic loading - **Thermal Stability**: Maintains properties at moderate temperatures --- #### **11. Quality Assurance** - SCC resistance testing per ASTM G47 - Microstructural examination - Mechanical properties certification - Chemical composition verification - Non-destructive testing (UT, RT) - Third-party certification available --- #### **12. Design Considerations** - **SCC Prevention**: Specifically designed for stressed applications - **Welding Design**: Minimal strength reduction in HAZ - **Corrosion Allowance**: Reduced need for corrosion allowance - **Temperature Range**: -196°C to +65°C service range - **Weight Savings**: Approximately 65% versus steel --- #### **13. Comparative Analysis** | Property | H116 | H321 | Standard H112 | |----------|------|------|---------------| | Yield Strength (MPa) | 215-265 | 230-280 | 125-165 | | SCC Resistance | Superior | Superior | Standard | | Typical Thickness | Thin to medium | Medium to thick | All thicknesses | | Applications | Marine structures | Pressure vessels | General purpose | --- *Note: 5083-H116 and 5083-H321 tempers represent premium grades of 5083 aluminum alloy specifically processed to provide enhanced resistance to stress corrosion cracking. These tempers are essential for critical applications in marine, offshore, and cryogenic services where reliability and safety are paramount. The choice between H116 and H321 depends on thickness requirements and specific application demands.*

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 1823 gallon liquid totes Special package is available on request.