Calcium aluminum alloy

Calcium Aluminum (Ca-Al) alloy is predominantly used as a deoxidizer and desulfurizer in the steel industry to improve the purity of molten steel. It is also a critical master alloy in the production of lead-acid battery grids, where it enhances the mechanical strength and corrosion resistance of the plates. Additionally, it serves as a reducing agent in the production of rare earth metals and as a hardening agent for other non-ferrous metal alloys.

Buyers must focus on the chemical composition ratio, typically ranging from 70/30 to 85/15 (Ca/Al) depending on the application. Ensure the impurity levels (such as Magnesium, Iron, and Silicon) are within the strictly defined limits of your production process. Physical forms like lumps, granules, or cored wires should be selected based on your feeding equipment to ensure optimal recovery rates and minimal oxidation during addition.

Suppliers should provide a Certificate of Analysis (COA) for every batch. For international trade, compliance with REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) is essential for the EU market. Furthermore, ensure the manufacturer follows ISO 9001:2015 quality management systems to guarantee consistency in the alloy's metallurgical properties.

Calcium is highly reactive; therefore, the alloy must be stored in a cool, dry, and well-ventilated environment. It is highly susceptible to oxidation and moisture, which can lead to the generation of hydrogen gas. Buyers should ensure the product is packed in hermetically sealed steel drums or vacuum-sealed bags with argon gas flushing to maintain chemical stability during long-term storage.

Calcium Aluminum Alloy is often classified under UN 1393 (Alloys of Magnesium or Calcium), falling into Hazard Class 4.3 (Substances which, in contact with water, emit flammable gases). You must ensure the supplier provides a valid MSDS (Material Safety Data Sheet) and uses IMO-compliant packaging. Shipping should be handled by logistics providers experienced in Dangerous Goods (DG) to avoid customs seizures or safety incidents at sea.

To ensure transaction security, utilize Trade Terms like FOB or CIF clearly defined in the contract. We recommend using the Secured Trading services on Made-in-China.com to protect your payments. Always conduct a factory audit or hire a third-party inspector (like SGS or Intertek) to perform a Pre-Shipment Inspection (PSI) to verify the chemical purity and weight before the final balance is paid.

Prices for Ca-Al alloys are heavily influenced by the LME (London Metal Exchange) prices for Aluminum and the market price of Calcium metal. Negotiate a formula-based pricing model linked to these indices for long-term contracts. For bulk orders, aim for volume-based discounts; however, be wary of prices significantly below market averages, as this often indicates high impurity content or recycled scrap usage.

Incorrect HS Code classification (typically under Chapter 28 or 76) is a frequent cause of delays. Ensure the Commercial Invoice, Packing List, and Certificate of Origin match the technical specs exactly. Be aware of anti-dumping duties or specific environmental taxes that your country may impose on metallurgical products imported from specific regions.