Metals Industry Knowledge Hub

C110 is Electrolytic Tough Pitch (ETP) copper with 99.90% minimum copper content and excellent electrical conductivity (100% IACS). It's the most common grade for electrical applications.

C101 is Oxygen-Free Electronic (OFE) copper with 99.99% minimum copper content. It offers superior ductility and is used in high-frequency applications, semiconductors, and vacuum tube components where the highest purity is required.

Essential documents include:

• Commercial Invoice with HS code
• Bill of Lading or Airway Bill
• Packing List
• Certificate of Origin
• Mill Test Certificate (MTC) with chemical composition and mechanical properties
• ASTM/ISO/DIN compliance certificates
• Insurance documents (if applicable)
• Import license (country-specific)

To verify ASTM compliance:

1. Request Mill Test Certificates (MTC) - These should show chemical composition and mechanical properties
2. Check Lab Accreditation - The testing lab should be ISO/IEC 17025 accredited
3. Verify Material Markings - Products should have grade stamps or batch codes
4. Third-Party Inspection - Consider hiring SGS, Bureau Veritas, or Intertek for pre-shipment inspection
5. Compare to Standard - Cross-reference MTC values with published ASTM specification ranges

Selection depends on your specific needs:

• 1000 Series (99%+ pure) - Electrical conductors, chemical equipment
• 3000 Series (Manganese) - Cooking utensils, roofing, siding
• 5000 Series (Magnesium) - Marine applications, pressure vessels
• 6000 Series (Mg + Si) - Structural components, automotive parts, extrusions
• 7000 Series (Zinc) - Aerospace, high-stress applications

Contact us with your specific application requirements for detailed recommendations.

Shipping timeframes vary by method and destination:

• Sea Freight (Most Common) - 20-45 days depending on route
• Air Freight - 5-10 days (more expensive, used for urgent orders)
• Express Courier - 3-7 days (small samples only)

Add 3-7 days for customs clearance. We provide real-time tracking and handle all export documentation to minimize delays.

Yes! We provide samples to qualified buyers. Sample policy:

• Small samples (under 1kg) - Free, buyer pays shipping
• Larger samples - Charged at cost, refundable with first order
• All samples include test certificates
• Sample lead time: 3-5 business days

This allows you to verify quality and test material compatibility before committing to larger purchases.