Custom Copper Parts

Pure copper.
Tellurium copper.
Beryllium copper.

Precision copper parts in multiple alloys: OFE C101 (99.99% pure) for electrical conductivity, C110 (99.9%) for general copper, C17200 BeCu for springs and electrical, C145 Tellurium for machinable copper. EV busbars, heat sinks, RF hardware, electrical contacts.

Copper Parts Quote Copper materials

OFE C101 BeCu C17200 Tellurium C145 Plating ready

01 · Copper grades

Which copper alloy.

Pure copper for electrical conductivity, alloyed copper for strength, beryllium copper for springs, tellurium copper when machinability matters. Each serves specific applications.

OFE C101

99.99% · max conductivity

Oxygen-Free Electronic copper. Highest purity, max IACS conductivity. UHV-compatible, superconductor hardware, particle accelerator components

C110 ETP

99.9% · general

Electrolytic Tough Pitch. Standard commercial copper. Busbars, electrical contacts, roofing, general copper hardware

C145 Tellurium

Machinable copper

Tellurium addition improves machinability 80% vs pure copper. Electrical connectors, high-volume precision copper parts

C17200 BeCu

Spring + conductive

Heat-treatable beryllium copper. Spring applications, electrical contacts requiring both strength and conductivity

C260 Brass

65/35 brass

Yellow brass workhorse. Plumbing, decorative hardware, general-purpose brass work

C360 Brass

Free-machining

60/40 lead-free machining brass. Highest machinability brass. Screw machine parts, fittings, precision brass components

02 · Applications

Where copper parts ship.

EV battery busbars

C110 ETP or C101 OFE busbars for EV battery packs — high-current electrical connections

Heat sinks

C110 or C101 heat sinks for high-power electronics, RF amplifiers, laser diodes

Electrical contacts

BeCu C17200 contacts for connectors, switches, electromechanical relays

RF hardware

C110 RF waveguides, cavities, antenna components for microwave systems

Particle accelerator

OFE C101 components for particle accelerators, superconductor hardware, cryogenic

High-current connectors

C110 or C145 heavy-current electrical connectors, lug hardware

Welding electrodes

C110 resistance welding electrodes, high-current welding hardware

EDM electrodes

C110 copper electrodes for sinker EDM work — precision electrode machining

Plumbing hardware

C260 brass plumbing fittings, valve bodies, decorative plumbing hardware

FAQ

Copper Parts questions.

Pure copper (C101, C110) is very ductile and gummy — chips don't break, they form long stringy shavings that wrap around the tool. Surface finish is poor without specialized techniques. Solutions: use tellurium-alloyed C145 (80% improvement in machinability), very sharp carbide tools with polished flutes, high feed rates to minimize contact time, copious coolant. Our experience with copper machining means acceptable results even in pure copper.

OFE C101 (oxygen-free electronic): used when oxygen content matters — UHV vacuum, cryogenic superconducting applications, electron beam welding, hydrogen atmospheres. About 2× cost of C110. C110 ETP: 99.9% pure, contains ~0.04% oxygen. Adequate for 95% of electrical and thermal applications. Use C110 by default; upgrade to C101 only when application genuinely requires oxygen-free purity.

Beryllium compounds are toxic when inhaled — beryllium dust from machining must be contained. Our BeCu machining uses: dedicated machining area with HEPA dust collection, wet coolant to prevent airborne particles, proper PPE for operators, containerized chip handling. Finished BeCu parts are safe to handle — the hazard is only during machining. We machine BeCu routinely with proper safety protocols.

Yes — TIG welding with copper filler, argon shielding, preheated for thicker sections. Copper has high thermal conductivity so heat management during welding is important. For busbar and electrical connection welding, often soldered or brazed instead of welded. Ultrasonic welding for thin copper busbars is becoming standard in EV battery packs.

As-machined: bright copper surface, oxidizes to dark brown in air within days — must be coated or plated for long-term appearance. Common finishes: electroless nickel (passivation + paint primer), tin plating (for solderability), silver plating (for electrical conductivity), gold plating (for corrosion + conductivity in connectors), chemical passivation (slows oxidation without plating). For cosmetic applications, lacquer coating preserves bright copper appearance.

C110 ETP: usually in stock, 3–7 day lead time. OFE C101: 7–10 days due to lower stock volume. BeCu C17200: 10–14 days with material order + machining. Tellurium C145: 5–7 days, similar to C110. For large-volume copper orders (100+ parts), plan on 2–3 weeks including material procurement if not in stock.