Copper Parts Australia
Custom copper machined parts in C101 electrolytic tough pitch copper, oxygen-free copper (OFC), and copper alloys. Electrical, thermal, and RF applications. Send us your drawing — we source, manage, inspect and deliver complete finished parts.
Copper Grade Selection Guide
The right copper grade depends on conductivity requirements, fabrication process, and operating environment. Here is how the principal grades compare.
| Grade | Key Property | Best For |
|---|---|---|
| C101 (ETP Copper) | 99.9% pure, 100% IACS conductivity | Bus bars, electrical connectors, general electrical |
| C103 (OF Copper) | Oxygen-free, no hydrogen embrittlement | Vacuum applications, RF components, high-conductivity |
| C110 (ETP Rod) | Standard electrical copper rod/bar | Machined connectors, terminals, switchgear |
| Chromium Copper | High strength, good conductivity | Electrodes, spot welding tips, high-stress electrical |
Industries Served
Electrical & Power
Copper is the benchmark for electrical conductivity. Bus bars, switchgear components, transformer leads, and high-current connectors machined to precise tolerances. 100% IACS conductivity in C101 ensures minimum resistance loss.
- ✓ 100% IACS conductivity
- ✓ C101 standard grade
- ✓ Custom bus bar profiles
- ✓ Switchgear and transformer components
Thermal Management
Copper's thermal conductivity (385 W/m·K — eight times that of steel) makes it ideal for heat sinks, cold plates, and thermal management components. CNC machined copper heat sinks and cooling blocks for electronics, laser systems, and power electronics.
- ✓ 385 W/m·K thermal conductivity
- ✓ Precision cooling channels
- ✓ Brazed assembly available
- ✓ Electronics and laser cooling
RF & Microwave
Oxygen-free copper (C103) is specified for RF waveguides, cavity resonators, and microwave components where hydrogen embrittlement and oxide inclusions would degrade RF performance. Precision machined cavities and waveguide sections.
- ✓ Oxygen-free C103 grade
- ✓ Low RF loss
- ✓ Precision cavity machining
- ✓ Waveguide and resonator components
Copper Parts FAQ
What copper grades are available for machined parts in Australia?
We supply copper machined parts in: C101 (ETP — Electrolytic Tough Pitch, 99.9% Cu, 100% IACS — the standard for electrical applications), C103 (Oxygen-Free, OF copper — no dissolved oxygen, prevents hydrogen embrittlement in brazing and vacuum applications, preferred for RF and microwave components), C110 (ETP rod — same as C101 but in rod form for turning), chromium copper (CuCr1 — precipitation hardened, 80% IACS, high strength for welding electrodes and high-stress electrical applications), beryllium copper (CuBe2 — highest strength copper alloy, spring contacts, precision instruments — note: beryllium dust is hazardous, machining requires safety controls), and tellurium copper (C145 — free-machining copper with 99.5% conductivity, best machinability of all copper alloys).
Why is copper difficult to machine and how is this managed?
Copper is gummy and ductile, tending to produce long stringy chips rather than breaking cleanly. This differs from aluminium (chips easily) or brass (very free-machining). Challenges: built-up edge on cutting tools (copper adheres to tool faces), poor chip breaking (chips tangle and can damage surface finish), and high thermal conductivity (heat dissipates into the workpiece causing thermal expansion). Management strategies: sharp tooling with high positive rake angles, correct cutting speeds (higher than steel, lower than aluminium), flood coolant to manage chip evacuation, and avoiding re-cutting of chips. Tellurium copper (C145) is significantly more machinable than standard ETP copper and is preferred when machinability matters more than absolute conductivity.
What are the typical applications for machined copper parts in Australia?
Australian applications for machined copper components include: mining electrical systems (bus bars, cable connections, switchgear — Australian mining operations run large electrical systems), power generation (generator connections, transformer leads, bus bars for substations), electronics manufacturing (heat spreaders, cold plates, custom connectors), defence and aerospace (RF components, waveguides, satellite system hardware), research institutions (university accelerator components, plasma systems), telecommunications (antenna components, RF cavities, repeater hardware), and industrial welding (copper welding tips, electrodes, fixtures for resistance welding).
What is the difference between ETP copper and oxygen-free copper?
ETP (Electrolytic Tough Pitch) copper — C101 — contains a small amount of dissolved oxygen (~0.03%) introduced during electrolytic refining. This oxygen is beneficial for conductivity (100% IACS) but causes hydrogen embrittlement: when ETP copper is heated in hydrogen-containing atmospheres (brazing, certain heat treatments), dissolved oxygen reacts with hydrogen to form steam, causing micro-cracks. Oxygen-Free (OF) copper — C103 — is refined without dissolved oxygen, preventing hydrogen embrittlement. Required for: vacuum brazing, components exposed to hydrogen atmospheres, RF applications where oxide inclusions would degrade performance, and cryogenic applications. Conductivity is essentially identical (99.95%+ vs 100% IACS). For most machined electrical applications, ETP is sufficient.
Can copper parts be plated or surface treated?
Yes. Common surface treatments for copper machined parts: tin plating (most common — protects copper from oxidation while maintaining solderability, used for electrical connectors and terminals), silver plating (highest conductivity plating, used for high-frequency RF components where skin effect makes surface conductivity critical), nickel plating (barrier layer, protects copper in harsh environments, required under gold plating), gold plating (corrosion-free contact surface for precision connectors), chrome plating (decorative, not typically used on functional copper), and clear lacquer (decorative protection for visible copper surfaces). Plating thickness and specification should be called out on your drawing.
What lead times can I expect for machined copper parts?
Copper parts follow standard lead times: quote within 2 business days from STEP file and drawing submission, standard production 7–14 business days from order confirmation. Simple turned parts in standard copper grades are typically at the shorter end of the lead time range. Custom alloys (beryllium copper, chromium copper) may require material procurement time of 2–5 additional business days. Rush service (3–5 business days) is available at a premium. For high-volume production of standard copper parts, lead times can be further discussed and scheduled.
Get a Quote in 2 Business Days
Upload your copper part drawing and receive a quote. We source, manage, inspect and deliver finished copper components — bus bars, heat sinks, RF components, and electrical connectors.
Start Your Quote →