Magnesium ZM21-0,,E FOUR

### **Product Datasheet: Magnesium ZM21-0** **Annealed Wrought Magnesium Alloy with Maximum Formability** --- #### **1. Overview** Magnesium ZM21-0 is a moderate-strength wrought magnesium alloy supplied in the fully annealed condition ("0" temper). This alloy achieves maximum softness and formability through complete annealing after hot working processes. The combination of zinc and manganese additions provides a good balance of corrosion resistance and mechanical properties while maintaining excellent workability. The "0" temper condition makes this alloy particularly suitable for complex forming operations and applications requiring maximum ductility. --- #### **2. Key Features & Advantages** - **Maximum Formability:** Excellent for deep drawing and complex forming operations - **Good Corrosion Resistance:** Manganese addition provides enhanced environmental performance - **Excellent Workability:** Can be formed at both room and elevated temperatures - **Good Weldability:** Suitable for all standard welding processes - **Cost-Effective:** Lower cost than zirconium-containing magnesium alloys - **Excellent Machinability:** High material removal rates with superior surface finish - **Fully Soft Condition:** Ideal for severe forming applications --- #### **3. Chemical Composition (Weight %)** | Element | Magnesium (Balance) | Zinc | Manganese | Silicon (max) | Copper (max) | Iron (max) | Other Elements (max) | |---------------|---------------------|--------------|--------------|---------------|--------------|------------|---------------------| | **Content (%)** | - | 1.8-2.5 | 0.6-1.4 | 0.10 | 0.05 | 0.005 | 0.30 total | *Note: The balanced zinc content provides moderate solid solution strengthening potential, while manganese enhances corrosion resistance by removing iron impurities. The "0" temper indicates full annealing to achieve maximum softness and ductility.* --- #### **4. Typical Physical & Mechanical Properties (0 Temper)** **Physical Properties:** | Property | Value | |---------------------------|------------------------------| | **Density** | 1.79 g/cm³ (0.0646 lb/in³) | | **Melting Range** | 630-650°C (1166-1202°F) | | **Thermal Conductivity** | 120 W/m·K | | **Specific Heat Capacity**| 1020 J/kg·K | | **Coefficient of Thermal Expansion** | 26.8 × 10⁻⁶/°C | | **Electrical Resistivity**| 8.0 μΩ·cm | **Mechanical Properties (0 Temper - Sheet/Plate):** | Property | 0.5-1.5 mm thickness | 1.6-3.0 mm thickness | 3.1-6.0 mm thickness | |---------------------------|--------------------------|--------------------------|--------------------------| | **Ultimate Tensile Strength** | 200-230 MPa (29-33 ksi) | 190-220 MPa (28-32 ksi) | 180-210 MPa (26-30 ksi) | | **Tensile Yield Strength**| 120-150 MPa (17-22 ksi) | 110-140 MPa (16-20 ksi) | 100-130 MPa (15-19 ksi) | | **Elongation** | 18-25% | 20-28% | 22-30% | | **Compressive Yield Strength** | 110-140 MPa (16-20 ksi) | 100-130 MPa (15-19 ksi) | 90-120 MPa (13-17 ksi) | | **Shear Strength** | 120-150 MPa (17-22 ksi) | 115-145 MPa (17-21 ksi) | 110-140 MPa (16-20 ksi) | | **Fatigue Strength** | 85-105 MPa (12-15 ksi) | 80-100 MPa (12-15 ksi) | 75-95 MPa (11-14 ksi) | | **Elastic Modulus** | 45 GPa (6.5×10⁶ psi) | 45 GPa (6.5×10⁶ psi) | 45 GPa (6.5×10⁶ psi) | | **Hardness** | 40-50 HB | 35-45 HB | 30-40 HB | | **Strain Hardening Exponent (n)** | 0.20-0.25 | 0.22-0.27 | 0.24-0.29 | --- #### **5. International Standards** ZM21-0 conforms to the following international specifications: - **ASTM B90/B90M:** Standard Specification for Magnesium-Alloy Sheet and Plate - **ISO 3116:** Wrought magnesium and magnesium alloys - **AMS 4376:** Aerospace Material Specification for Annealed Sheet and Plate - **DIN 9719:** Magnesium sheets and plates - **GB/T 5154:** Chinese National Standard for Magnesium Alloy Sheets - **JIS H 4201:** Japanese Industrial Standard for Magnesium Alloy Sheets --- #### **6. Applications** **Aerospace Components:** - Complexly formed aircraft interior panels - Deep drawn instrument housings - Compound curvature fairings and covers - Cabin interior structural components - Custom-shaped equipment enclosures **Automotive Industry:** - Automotive interior trim panels - Complex shaped dashboard components - Door panel substructures - Headliner and pillar trim components - Acoustic shielding panels **Electronics & Enclosures:** - Deep drawn electronic housings - Complex chassis components - Custom enclosure parts - Heat sink mounting plates - Shielding can components **Industrial Applications:** - Custom formed machinery guards - Complex shaped process equipment parts - Material handling custom components - Workstation formed panels - Specialized tooling applications **Consumer Products:** - Luggage complex structural parts - Sports equipment formed components - Furniture with complex curvature - Decorative and architectural elements - Artistic sculpture and displays --- #### **7. Processing & Fabrication Parameters** **Forming Characteristics:** - **Cold Forming Temperature:** 20-150°C (68-302°F) - **Hot Forming Temperature:** 150-350°C (302-662°F) - **Minimum Bend Radius:** 1-2 × thickness for 90° bends - **Deep Drawing:** Excellent for complex deep drawn parts - **Stretch Forming:** Suitable for compound curvatures **Annealing Process:** - **Annealing Temperature:** 340-400°C (644-752°F) - **Soaking Time:** 30-120 minutes depending on thickness - **Cooling Rate:** Furnace cool or air cool - **Grain Size After Annealing:** ASTM 5-7 typical **Machining Characteristics:** - **Machinability Rating:** Excellent - **Cutting Speed:** 400-800 m/min recommended - **Surface Finish:** 0.4-1.6 μm Ra achievable - **Tool Life:** 3-4× longer than steel machining - **Chip Characteristics:** Short, broken chips **Joining Methods:** - **TIG Welding:** Excellent with ERMg2 or ERMg3 filler - **MIG Welding:** Good for production welding - **Resistance Spot Welding:** Excellent for sheet joining - **Adhesive Bonding:** Very good with proper surface treatment - **Mechanical Fastening:** Good for all standard fasteners **Surface Treatment:** - **Chemical Conversion:** Excellent for chromate and phosphate - **Anodizing:** Suitable for hard anodizing processes - **Electroplating:** Good base for subsequent plating - **Painting:** Excellent adhesion with proper preparation --- #### **8. Quality Assurance & Specifications** - **Dimensional Tolerances:** Per ASTM B90 commercial standards - **Flatness:** Suitable for most forming applications - **Surface Quality:** Standard mill finish with minimal defects - **Grain Size Control:** Consistent microstructure throughout - **Certification:** Mill certification available - **Testing:** Full mechanical and chemical certification --- **Disclaimer** This technical data represents typical properties for ZM21-0 in the fully annealed condition. Properties may vary based on manufacturing process, thickness, and specific annealing parameters. The "0" temper provides maximum formability for the most demanding forming applications but offers lower strength than strain-hardened tempers. Users should conduct appropriate testing to verify suitability for specific applications and consult relevant material specifications before use. Proper safety precautions for magnesium processing must be followed throughout all manufacturing operations.

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 3381 gallon liquid totes Special package is available on request.