For importers, purchasing transformer aluminum strip from China or other manufacturing hubs requires a number of important certifications to ensure smooth customs clearance, quality control, and regulatory compliance. Here’s a detailed look at what you need and why they matter.

 Mill Test Certificate (MTC)

Also known as a quality certificate or inspection certificate, the MTC provides verified data on:

• Chemical composition of the aluminum alloy (e.g., 1060, 1050, 1070)
• Mechanical properties (tensile strength, elongation)
• Dimensions and tolerances
• Production batch/lot number

It must be issued and stamped by the factory, often in English, and sometimes reviewed by a third-party agent like SGS or BV (Bureau Veritas).

 Certificate of Origin (CO)

This document declares the country of manufacture and is essential for claiming trade agreement benefits (e.g., duty-free or reduced tariffs).

Common formats include:

• Form E: For exports to ASEAN countries under China-ASEAN FTA
• Form F: For Chile
• Form A: Generalized System of Preferences (GSP)
• Ordinary CO: If no FTA applies

3. RoHS and REACH Declaration

European importers in particular require these environmental compliance documents:

• RoHS: Confirms no hazardous substances like lead, cadmium, or mercury
• REACH: Declares compliance with EU chemical safety rules for substances

Our aluminum strip products are regularly tested and certified by SGS for RoHS and REACH compliance, available upon request.

 Packing List & Commercial Invoice

Every shipment must include a commercial invoice and packing list matching the declared HS code and product name:

• Invoice must include price, description, HS code, payment terms
• Packing list should include weight, dimensions, number of coils, packaging method

Bill of Lading (B/L)

The bill of lading proves ownership and shipping of the goods. A clean, on-board B/L is preferred. For LC shipments, make sure all fields are aligned with LC terms.

 Optional Certifications

• Third-party Inspection Report (e.g., SGS or Intertek)
• Material Safety Data Sheet (MSDS) for certain clients
• UL or ISO Certificates as proof of factory credibility

For any buyer of aluminum strip for transformer winding, understanding and preparing these documents ahead of time ensures fast customs clearance and compliance with local import laws. We offer full document support and can work with your freight agent or forwarder to deliver every certificate accurately and promptly.