ASM Specialty Handbook - Copper and Copper Alloys

Who's at fault? Your CNC machining supplier or your drawings?

You're having difficulties with a precision component for a critical medical device. The part won't fit the assembly. Or the finish isn't right. Or the quality/consistency is hit and miss. Or any number of other issues. But your existing supplier – who perhaps has been reliable up until now – is pushing back: they did "exactly as instructed", they protest. They followed your drawings/CAD models "to the letter". So what went wrong? And how can it be fixed quickly and cost-effectively? You want a second opinion – is the issue with the supplier, the drawings or both?

When and how to change your CNC machining supplier: A Buyers Guide

International alloy designations and chemical composition limits for wrought aluminum and wrought aluminum alloys