Contact surfaces
Mark the surfaces that make electrical or thermal contact. Give flatness, roughness and coating requirements for those faces instead of applying one cosmetic finish to the entire part.
Metal / CNC MATERIALS
Copper CNC Machining
Custom copper components for drawing-based orders. Specify the copper alloy, supplied condition and any functional test requirements.
CNC milling & turning · Drawing-based orders
Is conductivity an acceptance requirement or only a selection preference?
If electrical or thermal performance is part of acceptance, put the required property, condition and verification on the RFQ. A high-conductivity copper and a machinability-focused copper alloy should not be substituted using a generic “copper” description. OUJI’s confirmed experience covers copper machining; specific grades below are reviewed individually.
01 / MATERIAL SPECIFICATION
Copper grades & conditions.
Match the full designation on your drawing. Frequent machining experience, published project evidence and specifications for review are shown separately.
| Grade / designation | Experience | Include with your drawing | Inquiry |
|---|---|---|---|
| C101 | Specify for review | C101: keep the oxygen-free copper specification and any conductivity or cleanliness requirement. | Quote grade ↗ |
| C110 | Specify for review | C110: state the temper and whether conductivity needs a supplied-stock record or a separate test. | Quote grade ↗ |
| C145 tellurium copper | Specify for review | C145 tellurium copper: identify the alloy explicitly when machining behavior is part of the material choice. | Quote grade ↗ |
| C172 beryllium copper | Specify for review | C172 beryllium copper: provide the supplied and final condition; do not treat it as unalloyed copper. | Quote grade ↗ |
| C18150 chromium copper | Specify for review | C18150 chromium copper: specify the required condition, hardness and any conductivity acceptance criterion. | Quote grade ↗ |
OUJI machining experience: confirmed by the company owner, 10 September 2026. Family-level experience does not establish a specific grade, stock condition or customer end use; see individual row and case evidence.
Listed grades do not imply current inventory. Material condition, stock form and documentation are agreed with the quotation.
02 / MACHINING REQUIREMENTS
Make the drawing ready for review.
Focus on the details that change material purchasing, the machining route and finished-part acceptance.
Burrs at narrow slots
Show small slots, intersecting holes and thin edges in a drawing view. Specify edge breaks where a remaining burr could prevent assembly or close an intended gap.
Plating and exposed areas
Identify contact faces to be plated or masked and the required plating thickness. State whether fitted dimensions are inspected before or after the coating.
ORDER DETAILS
Material, finish and documentation.
Specify the requirements together so the quoted scope matches the finished part you need.
Purchasing
Material certificates ↗
Specify the material records and traceability your order needs.
ManufacturingFinish compatibility ↗
Connect material, coating and final dimensional requirements.
SpecificationGrade cross-reference ↗
Review regional names without assuming an automatic substitute.
Finishing is coordinated through specialist partners. View surface finishing services.
Can a material datasheet certify conductivity of my finished part?
A reference datasheet describes the named material under its stated conditions. If your purchase requires measured conductivity or heat/lot evidence, define that record separately with the order.
Can C145 be substituted for C110 to improve machining?
Only after reviewing the drawing’s material and functional requirements with the buyer. An easier machining route does not by itself authorize a different alloy.
DRAWING TO QUOTATION
Have a material on your drawing?
Send the drawing and quantity. We’ll review the material, machining route, finish and inspection requirements together.
Response within 24 hours of receiving complete project details.
Start with what you have.
Open the full request form ↗Details already in your drawing do not need to be repeated. If a material is undecided, tell us what the part needs to do.
See our inspection approach ↗