Aerospace aluminium 7075 components: materials, qualifications and market

Not all aluminium in the aerospace supply chain is equal. When a procurement office at a European aerospace prime contractor specifies 'aluminium 7075-T6', it is indicating an alloy with precise mechanical characteristics, a specific heat treatment and a series of production process qualification requirements that are non-negotiable. For a precision machine shop wanting to enter this market, understanding these specs - and demonstrating the ability to meet them - is the entry barrier that separates qualified suppliers from the rest.

The market for structural aerospace custom machined parts in aluminium exceeded $25 billion globally in 2025 and is growing at 6–8% per year. For UK and European suppliers with 5-axis milling capability and EN 9100 certification, this represents one of the most interesting markets to diversify from automotive demand towards multi-year contracts with stable margins.

Having a 5-axis milling machine is not sufficient to produce qualified aerospace custom machined parts. 5-axis milling as a certified production capability requires: machine capability study (Cpk ≥ 1.67 on critical dimensions), traceable tooling with conformity certificates, documented dimensional inspection procedures and certified-trained operators. For structural aerospace parts, final dimensional inspection includes CMM measurements with a qualified programme and surface roughness verification.

EN 9100 certification is the minimum requirement to become a qualified supplier to any European aerospace prime contractor. Having good CNC machining services machines and processes is not enough: you must demonstrate a quality management system that guarantees repeatability, traceability and risk management. For precision machine shops, the path to EN 9100 typically requires 12–18 months of internal work and an investment of £27,000–£72,000 for an SME.

ReArm Europe, the European rearmament programme announced in 2025, is generating demand for structural custom machined parts in aluminium 7075 and titanium that the existing supply chain struggles to meet. Lead times for structural components from qualified precision machining suppliers have extended from 8–12 weeks to 16–24 weeks in many categories. This creates a window of opportunity for suppliers with 5-axis milling capability and EN 9100 certification.

The aerospace supply chain is not looking for the cheapest CNC machining services supplier: it is looking for the supplier that does not cause problems. For the precision machining industry, aerospace and defence represent the market where historical precision engineering know-how - accuracy, attention to detail, production flexibility - finds its highest economic valorisation.