Technical Article

Material Selection Guide for Precision Parts

Material choice drives cost, performance and manufacturability. This guide helps you pick the right stock for machined precision parts.

Aluminium: the default workhorse

6061-T6 for general parts, 7075-T6 when stiffness-to-weight is critical, 5083 for weldments and vacuum. Easy to machine, anodises well.

Stainless: corrosion and cleanability

304 for general corrosion resistance, 316L for marine/chemical, 17-4 PH when you need hardness after heat treatment. Watch work hardening during cuts.

Titanium: strength at weight

Grade 5 (Ti-6Al-4V) for strength and biocompatibility; harder to machine — lower speeds, rigid setups, copious coolant.

Plastics & special alloys

PEEK for high-temperature, chemical and dielectric needs; acetal for low friction. Invar/Kovar for dimensional stability in measurement and electronics.

Frequently asked questions

When should I choose PEEK over aluminium?

When you need chemical resistance, high temperature service, or an electrical insulator with tight tolerances.

Is titanium worth the cost?

Yes when weight, strength and corrosion resistance all matter — aerospace, medical and subsea are typical.