Brass and Copper in Manufacturing
Brass and copper are specified by UNS number, and C360 and C110 are chosen for opposite reasons. What a capability page needs to state about free-machining grades and conductivity.
Brass and copper are specified by UNS number, and C360 free-machining brass and C110 electrolytic copper are chosen for opposite properties. A page naming the family without the number has stated nothing a buyer can match.
These two sit together commercially and pull apart technically, which is why a page treating them as one material serves neither request. The programme argument behind stating grades precisely is in manufacturing SEO.
The grades a drawing calls
A UNS designation is the specification a drawing carries, and the C-prefixed numbers cover the copper alloys.
C360 is free-machining brass and the highest-machinability metal in common use, chosen where cycle time dominates and strength does not. C110 is electrolytic tough pitch copper, chosen for conductivity, and it machines poorly by comparison.
C260 cartridge brass is the forming grade, ductile enough to draw and stamp. C932 bearing bronze covers the sleeve and bushing work where wear surfaces run against steel.
Choosing between them is a property decision rather than a cost one, and a request naming "brass" has not made it.
What drives the quote
Free-machining brass produces short chips and long tool life, which is why parts in C360 quote at a fraction of the cycle time of the same geometry in stainless.
Copper is the opposite case, gummy and prone to built-up edge, so an achievable tolerance and finish depend on tooling and coolant strategy rather than on machine accuracy.
Lead-free brass is a distinct material rather than a variant. Regulations on drinking-water components pushed the sector toward low-lead alloys, and they machine measurably harder than C360. A shop quoting a lead-free grade from C360 experience quotes it wrong.
Dezincification is the corrosion mode brass fails by in some water services, which is why a resistant grade is specified rather than assumed.
What a capability page should state
A capability page must state process, materials, tolerances, capacity, certifications, and industries served, and the copper alloys belong there by UNS number.
State the grades routinely run, whether lead-free alloys are handled, and the bar sizes held. Where parts are plated or passivated afterwards, name the specification.
The structure is at capability page structure and the cluster reasoning at materials.
Common questions
Why is C360 so cheap to machine?
Lead in the alloy breaks chips and lubricates the cut. That is also why lead-free substitutes cost more in cycle time.
Is brass suitable for electrical work?
For terminals and hardware, often. Where conductivity is the requirement, copper is specified and brass is not a substitute.
What changed with lead-free requirements?
Drinking-water components moved to low-lead alloys, which machine harder. It is a materials change with a real cost consequence rather than a relabelling.
Does copper need special tooling?
Sharp geometry and the right coolant rather than special machines. The constraint is built-up edge, and experience shows in the finish.
Last reviewed . Published by ManufacturingSEO.ai.