Metal material guide
Brass CNC Machining Service
Brass is often considered for turned fittings, connectors and precision components. Alloy identity matters because copper, zinc and lead content affect machining, forming, conductivity and end-use restrictions.
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When Brass fits — and when to pause.
Turned components
C36000 is a common free-cutting reference, subject to end-use restrictions.
Formed sheet components
C26000 and related sheet brasses have different product forms and behaviour.
Regulated use
State potable-water, RoHS, lead or other restrictions before sourcing.
Use a complete material designation.
The following examples are common ways buyers describe the family. They are not a stock list and they do not authorise substitution.
- C36000 free-cutting brassConfirm supplier grade, condition, stock form and required documentation.
- C26000 cartridge brassConfirm supplier grade, condition, stock form and required documentation.
- C23000 red brassConfirm supplier grade, condition, stock form and required documentation.
- C22000 commercial bronzeConfirm supplier grade, condition, stock form and required documentation.
RFQ material line
Brass · UNS alloy, temper and lead restriction · stock form · quantity · required certificates · permitted substitutions.
If an application approval matters, name the regulation, edition and acceptance evidence.
Plan machining around the material behaviour.
Product form
Do not substitute sheet, bar or casting alloys by colour.
Lead restrictions
State the allowable composition and required declaration.
Burr and thread control
Identify sealing faces, threads and small passages on the drawing.
Specify the final surface and dimensions.
Nickel or other plating
Specify thickness, undercoat, masking and contact surfaces.
Polishing
Define appearance and protected dimensions.
As-machined
Agree tool marks, burrs and edge breaks.
Separate material identity from dimensional inspection.
Purchase specification, supplier documents, lot traceability and an agreed identification or test method where appropriate.
Drawing, datums, critical characteristics, inspection conditions and the required report format.
Use the relevant tester only when the drawing defines the parameter, method, location and acceptance range.
Reference and quotation boundary.
External material reference: Copper Development Association UNS brass data ↗
The source supports general material context. It does not establish Prolean stock, achievable tolerances, certification scope, price or delivery for a specific part. Those are confirmed in the quotation.
Technical review updated October 2026.
Brass machining questions.
How should Brass be specified for machining?
State the complete UNS alloy, temper and lead restriction, the stock form, permitted substitutions and required documents. Add the drawing, quantity, finish and inspection requirements.
Does a listed grade mean it is stocked?
No. The examples help structure an RFQ. Availability, substitutions, price and delivery are confirmed for the project.
How are tolerances confirmed?
Tolerances depend on geometry, material condition, feature size, quantity, finishing and inspection conditions. Mark critical dimensions and datums; the quote confirms what can be held.
Can material documents and inspection reports be supplied?
State the required certificate, traceability and dimensional or test report with the RFQ. The available document set and test method are confirmed before production.
Bring the drawing and material into one review.
Send the CAD model or drawing, quantity, material designation, service conditions, finish and acceptance requirements.
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- MaterialComplete grade, condition, stock form and documents.
- PartCritical dimensions, datums, finish and inspection.
- ProjectQuantity and requested delivery date.