How to Source Quality Aluminum and Steel Alloys for CNC Machining in China
Sourcing CNC machined aluminum and steel parts from China demands clear requirements. Start by confirming the exact alloy grade and checking material availability before setting delivery dates. Request mill test certificates (MTCs) to verify the chemical composition of each batch. Next, specify corrosion protection for long ocean shipments. Options include anodizing for aluminum, passivation for stainless steel, zinc or nickel plating for carbon steel, and temporary VCI coatings. Proper surface treatment prevents oxidation and pitting during weeks at sea. Boost protection with packaging. Use VCI paper or bags alongside moisture-barrier wrapping and desiccants to guard against humid, salt-laden air inside shipping containers. Lock in alloy grades, mill certificates, surface treatments, and protective packaging at the RFQ stage. This ensures parts arrive on spec and in good condition. Have you ever faced corrosion or grade issues on an overseas order, and how did you adjust your sourcing process?
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