Overview
Aluminum and stainless steel are common choices for precision turned parts, but they solve different design problems. Aluminum is often selected for weight-sensitive or high-machinability geometries; stainless is typically chosen when corrosion resistance, hygiene exposure or higher strength is the driver.
Material choice should start from the functional requirement on the drawing—not from a default alloy list. Finish, tolerance stack and secondary operations all change once the alloy family is fixed.
How to choose
Prefer aluminum when mass, thermal conductivity or fast material removal matters and the service environment allows it. Prefer stainless when corrosion, media contact or mechanical durability outweighs machining cost and cycle time.
Within each family, specify the grade and temper or condition on the drawing. If brass or copper alloys are also under review for conductivity or connector work, compare them separately from aluminum and stainless rather than treating all non-ferrous options as interchangeable.
RFQ checklist
State alloy grade, any heat-treat or hardness note, surface finish, coating or passivation needs, quantity and critical tolerance zones. If both aluminum and stainless are still open options, say so clearly so manufacturability feedback can compare routes.
Next steps
Browse material guidance under Resources, then send drawings through Request a Quote for a process recommendation.
