Aerospace-grade aluminium is not just cleaner than commercial-grade. It is a different class of material. The hydrogen content must be below 0.06 ml/100g. The inclusion count must be measured in parts per billion, not parts per million. And every melt must be traceable to its raw material source. I have spent 25 years working with aluminium melting furnaces. In the last five years, I have helped foundries in China, Southeast Asia, and Europe develop aerospace-grade melting capability. The gap between...
