aluminium ingot

The most common standard for primary aluminium ingots is P1020 (99.7% purity), which is the benchmark for the London Metal Exchange (LME). For specialized applications, buyers may require High Purity Aluminium (99.9% to 99.99%). It is essential to verify the chemical composition, specifically the maximum allowable levels of Iron (Fe) and Silicon (Si), as these significantly impact the mechanical properties of the final alloy.

Suppliers should ideally hold ISO 9001 for quality management and ISO 14001 for environmental standards. For automotive industry applications, look for IATF 16949 compliance. Most importantly, every shipment must be accompanied by a Mill Test Certificate (MTC) or a Certificate of Analysis (COA) that matches the specific heat number of the batch.

If you are not buying pure P1020, you are likely looking for Alloy Ingots (e.g., ADC12, A356, LM6). ADC12 is widely used for die-casting automotive parts due to its excellent fluidity. A356 is the standard for high-strength structural components like alloy wheels. Ensure the supplier provides a detailed breakdown of alloying elements like Magnesium (Mg), Copper (Cu), and Manganese (Mn).

Beyond chemical purity, buyers should inspect for surface cleanliness and oxidation. Ingots should be free from corrosion, dross, and non-metallic inclusions. The physical shape should be uniform to ensure stacking stability during transport and efficient melting in the furnace. Request photos of the bundling and strapping to ensure they can withstand maritime moisture.

Aluminium is a commodity with prices linked to the LME (London Metal Exchange) or SHFE (Shanghai Futures Exchange). Professional buyers should use formula-based pricing (e.g., LME Cash Price + Premium) rather than fixed prices for long-term contracts. Always clarify if the quoted price includes the 'Premium' (delivery and regional surcharges).

Due to the high value of aluminium, use secure payment methods like Irrevocable Letter of Credit (L/C at sight) or Trade Assurance via Made-in-China.com. Avoid 100% T/T advance payments to unknown suppliers. For first-time orders, it is highly recommended to hire a third-party inspection agency (like SGS or Intertek) to verify the quantity and quality at the loading port.

Check for Anti-Dumping Duties (ADD) and Countervailing Duties (CVD) in your specific country, as many regions (like the US and EU) have strict measures against aluminium imports from certain origins. Verify the HS Code (typically 760110 for unalloyed) to calculate accurate customs duties and ensure the supplier provides a Certificate of Origin to benefit from Free Trade Agreements (FTAs).

Aluminium ingots are high-density cargo. Ensure the supplier uses heavy-duty 20ft containers to maximize weight capacity (usually up to 25-28 tons depending on the line). Request seaworthy packaging with plastic wrapping or pallets to prevent saltwater corrosion during transit, which can lead to 'white rust' and affect the melting quality.