Magnesium K1A-F,UNS M18010; Mg; ASTM B 80,E FOUR

Product Datasheet: Magnesium Alloy K1A-F (UNS M18010)** **A High-Purity, Corrosion-Resistant Casting Magnesium Alloy** --- #### **Overview** Magnesium Alloy K1A-F (UNS M18010) is a non-heat-treatable sand casting alloy primarily composed of high-purity magnesium with a small Zirconium addition. The "F" temper designation indicates that it is used in the as-fabricated state, without any thermal treatment. Its key advantage lies in its exceptional corrosion resistance, superior to many other magnesium alloys, making it the preferred choice for critical chemical processing applications. --- #### **Key Features & Benefits** * **Exceptional Corrosion Resistance:** Offers outstanding resistance to corrosion, particularly from alkaline environments and certain chemicals. It is considered one of the most corrosion-resistant magnesium alloys available. * **Excellent Damping Capacity:** Effectively absorbs vibration and mechanical energy, reducing noise and fatigue. * **Good Castability:** Can be reliably cast into complex shapes using sand casting processes. * **High Thermal and Electrical Conductivity:** Maintains the inherent high conductivity properties of pure magnesium. * **Non-Heat-Treatable:** Simplifies the manufacturing process as it does not require solution heat treatment or aging. --- #### **Chemical Composition (Weight %)** As specified in **ASTM B80**, the composition of K1A alloy is as follows: | Element | Magnesium (Mg) | Zirconium (Zr) | Impurities (Max) | | :--- | :--- | :--- | :--- | | **Content %** | Balance | 0.45 - 0.80 | ≤ 0.30 (Total) | *Note: The high purity and specific zirconium content are critical for achieving the alloy's renowned corrosion resistance. Zirconium also acts as a grain refiner, enhancing the cast structure.* --- #### **Physical & Mechanical Properties (Typical for F Temper - As Cast)** The following values are typical for sand cast test bars. | Property | Value | Condition / Note | | :--- | :--- | :--- | | **Density** | 1.74 g/cm³ (0.063 lb/in³) | At 20°C | | **Melting Point** | ~ 650°C (1202°F) | | | **Ultimate Tensile Strength (UTS)** | 105 MPa (16,000 psi) | | | **Tensile Yield Strength (TYS)** | 41 MPa (6,000 psi) | At 0.2% Offset | | **Compressive Yield Strength (CYS)** | 41 MPa (6,000 psi) | | | **Elongation** | 8 - 12% | In 2 inches (50 mm) | | **Modulus of Elasticity** | 45 GPa (6.5 x 10⁶ psi) | | | **Hardness** | 40 HB | | --- #### **International Standards & Cross-References** Magnesium Alloy K1A-F is primarily governed by the following standard: * **ASTM:** **ASTM B80** - Standard Specification for Magnesium-Alloy Sand Castings * **UNS:** **M18010** * **Common Name:** **K1A-F** --- #### **Product Applications** Due to its unique combination of properties, K1A is almost exclusively used in highly specialized applications where corrosion resistance is paramount. * **Nuclear Industry:** * **Fuel Element Cans for Gas-Cooled Reactors:** This is the primary and most critical application. K1A's low neutron absorption cross-section and excellent resistance to corrosion by CO₂ coolant (at high temperatures and pressures) make it an ideal material for this purpose. * **Chemical Processing:** * Components handling corrosive chemicals, particularly in alkaline environments. * Pump housings, valve bodies, and impellers for specific chemical services. * **Specialized Aerospace & Defense:** * Components where maximum vibration damping and corrosion resistance are required, though its use is less common than higher-strength alloys. --- #### **Processing & Handling** * **Casting:** Designed specifically for sand casting processes. * **Heat Treatment:** None (F Temper). The alloy is used in the as-cast condition. * **Machining:** Exhibits excellent machinability, typical of magnesium alloys, allowing for high cutting speeds and good surface finishes. * **Joining:** Can be welded using Gas Tungsten Arc Welding (GTAW/TIG) with a compatible filler rod, though this is less common due to its application in monolithic cast structures. * **Corrosion Protection:** While it has excellent inherent resistance, standard magnesium protection schemes (e.g., chemical conversion coatings, paint) are still recommended for service in most industrial atmospheres. --- **Disclaimer:** This information is provided for reference purposes only. Material properties can vary based on foundry practice, casting geometry, and section size. Users must consult the latest ASTM B80 specification and conduct their own testing to verify suitability for a specific application, especially for critical applications like nuclear components.

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 3344 gallon liquid totes Special package is available on request.