C101 (C10100) OFE (Oxygen-Free) Copper Turned Parts and Components
C101 (UNS C10100) OFE copper turned parts are precision components made from oxygen-free electronic copper for applications requiring a defined high-purity copper grade. Brass Parts India supplies drawing-based pins, sleeves, flanges, contacts and thermal components for electrical OEMs, EPC contractors, utilities and distributors. OFE means oxygen-free electronic; it is distinct from C11000 ETP and C10200 OF copper. Specify the exact material standard, condition, cleanliness and finished dimensions. The listed rate is US$ 19.50/kg, with the production and delivery scope confirmed by quotation.
Price: US$ 19.50/kg
Brand: Brass Parts India. Manufacturing location: Jamnagar, Gujarat, India. Enquiries are welcome from domestic and international industrial buyers; delivery terms are confirmed for the destination.
Detailed product overview
C10100 oxygen-free electronic copper identity
UNS C10100 identifies oxygen-free electronic copper with tightly controlled impurity limits. It is selected when the material specification calls for this particular high-purity grade, not simply when a buyer wants a bright copper appearance. The minimum copper content is 99.99%, with an oxygen limit of 0.0005%, subject to the complete governing specification. These chemistry requirements should be supported by appropriate material records. Use the full UNS designation on drawings because the short label C101 can refer to a different material in another national system. Record the stock form and required condition as well.
Turned components for electrical interfaces
C10100 can be machined into stepped contacts, conductive pins, hollow sleeves and flanged terminals. Turning establishes diameters and shoulders around a common axis; drilling, boring and secondary milling complete the required interfaces. Identify the surfaces that carry current and the features that locate the part inside an insulating or mechanical assembly. Contact pressure and geometry remain important even when the bulk copper has high conductivity. Specify any coating and the finished dimensions of the contact zone. The grade does not by itself establish voltage capability, short-circuit performance or current rating.
Vacuum and controlled-atmosphere applications
OFE copper is considered for selected vacuum, electronic and controlled-atmosphere components because of its low oxygen content and defined impurity limits. However, specifying C10100 does not automatically make a machined part vacuum-clean or leak-tight. Surface residues, trapped volumes, joining methods and handling can affect the finished assembly. The enquiry should identify cleaning acceptance, packaging, bakeout conditions and any leak testing that must be included. Avoid generic instructions such as vacuum quality without measurable requirements. Material certification, dimensional inspection and cleanliness verification provide different evidence and should be ordered separately when required.
Thermal interfaces and high-purity components
Oxygen-free electronic copper is also used where a machined component provides a thermal path alongside an electrical or purity requirement. Typical forms include contact bases, heat-transfer blocks, flanges and sleeves. The design should define the mating surface, thickness and mounting arrangement that influence heat flow. High purity does not eliminate thermal contact resistance or replace a cooling-system calculation. Surface flatness, fastening load and interface materials need application-specific limits. Provide the expected temperature range and any thermal cycling requirement so the material condition and geometry can be reviewed against the complete service environment.
Joining and material-condition control
Low oxygen content avoids the particular oxygen-related hydrogen embrittlement concern associated with tough-pitch copper, but the joining process still needs qualification. Brazing or welding parameters, filler selection, surface preparation and the surrounding assembly must suit the design. Heating can change the cold-worked condition and therefore the mechanical behaviour of a component. Define whether dimensions and strength requirements apply before or after the joining cycle. If the part is intended for subsequent processing by the customer, communicate that process during quotation. A generic oxygen-free label is insufficient where a specified impurity limit is essential.
Machining high-purity ductile copper
C10100 remains a ductile copper and should not be mistaken for a free-machining alloy. Sharp tooling, appropriate cutting conditions and secure support help control burrs and protect fine features. Thin-wall sleeves, narrow grooves and long contact pins deserve particular attention to distortion and workholding. Internal passages need an accessible cleaning and inspection route. If machining productivity motivates a proposed move to C14500, confirm that tellurium is acceptable to the application before changing material. For OFE orders, preserve the original grade identity and traceability throughout machining, cleaning and shipment.
Key features
- UNS C10100 oxygen-free electronic copper with grade-specific impurity control
- Turned pins, sleeves, flanges, contact bases and thermal parts
- Separate material, dimensional and cleanliness requirements
- CNC turning with drawing-defined drilling, boring and milling
- Joining and post-process condition reviewed against the application
- Batch documentation and protective packaging specified at enquiry
Drawing-controlled dimensions and datums
A controlled drawing defines the part more precisely than a catalogue photograph. Identify the primary axis, locating face and secondary datum before specifying diameters or hole positions. General dimensional tolerance is ±0.05 mm where agreed; individual tolerances, geometric controls and surface roughness require separate callouts. Tell the supplier which dimensions affect assembly, electrical contact or sealing. Include units, drawing revision and the finished condition for inspection. This helps distinguish functional requirements from dimensions that can tolerate normal manufacturing variation.
Threads, bores and mating interfaces
Specify metric or unified threads by size, pitch, class and usable engagement length. Identify blind holes separately from through holes and allow for drill points and thread runout. Bores used for alignment need different acceptance criteria from clearance passages. Coating thickness can change thread fit and internal diameters, so state whether inspection occurs before or after plating. Include entry chamfers and burr limits at cross-hole intersections. Assembly torque and joint loading should be supplied when they influence wall thickness or thread design.
Contact surfaces and coating options
Machined copper can be supplied with a drawing-defined bare finish or an agreed surface treatment. Tin, silver or nickel systems should be specified by function, thickness and masking requirements rather than appearance alone. Contact resistance depends on surface condition, joint pressure and the complete interface. Flatness and roughness therefore deserve explicit limits on critical contact faces. Identify surfaces that must remain uncoated and define any post-treatment inspection. A bright finish is not evidence of a particular alloy or verified electrical performance.
CNC turning, milling and secondary operations
Turning creates concentric diameters, shoulders, grooves and bores; milling adds flats, slots, pockets and mounting patterns. The manufacturing route depends on access, workholding and the relationship between features. A part with a long unsupported section may need a different sequence from a compact terminal block. State internal corner radii that can be accepted and identify surfaces that cannot receive clamping marks. Combining operations can reduce assembly interfaces, but the final geometry still needs drawing review before production commitments are made.
Inspection records and batch identification
Inspection planning begins with the drawing revision and material requirement. Critical features may require dedicated gauges, a dimensional layout or first-article approval according to the purchase order. Define the sampling plan and reporting format before manufacture. Material identification should remain connected to the stock batch through processing and packing where traceability is specified. A certificate of chemical composition does not prove dimensional conformity, and a dimensional report does not prove alloy chemistry. Request each type of evidence according to the risk and function of the component.
Handling, packaging and repeat supply
Copper contact faces and fine threads benefit from packaging that prevents abrasion and impact during transport. Separate similar components by part number, revision and material grade. Specify package quantities, batch labels and any cleanliness or storage conditions required by the receiving operation. Repeat orders should refer to the latest approved drawing and recorded deviations. Distributors can simplify replenishment by maintaining separate line items for visually similar alloys. Packaging and release documentation should be included in the quotation when they go beyond the normal supply arrangement.
Technical specifications
| Parameter | Specification / ordering information |
|---|---|
| Product | C101 (C10100) OFE (Oxygen-Free) Copper Turned Parts and Components |
| Brand | Brass Parts India |
| Material | UNS C10100; OFE / Cu-OFE |
| Copper content | 99.99% minimum, exclusive of silver in the UNS reporting basis |
| Oxygen limit | 0.0005% maximum, equivalent to 5 ppm; full impurity limits also apply |
| Electrical conductivity | 101% IACS minimum in annealed condition; verify product and temper requirements |
| Stock condition | Annealed or worked condition as specified; properties depend on form and temper |
| Geometry | Turned contacts, sleeves, flanges, thermal bases and custom components |
| Manufacturing | CNC turning and milling with drawing-defined secondary operations |
| General dimensional tolerance | ±0.05 mm where agreed; individual drawing requirements take precedence |
| Threads and surface finish | Drawing-defined type, class, roughness and coating |
| Price | US$ 19.50/kg |
Material properties depend on stock form and temper. Confirm required values against the ordered specification and material documentation; they are not finished-assembly ratings.
Raw material grades and international equivalents
The following table identifies common grade families for purchasing discussion. International references are not unconditional substitutes: chemistry limits, stock form, temper and test requirements can differ. Use the exact approved standard and revision. Do not confuse C10100 OFE with C10200 OF or a legacy national C101 designation.
| UNS grade | European reference | Other reference / procurement note |
|---|---|---|
| C11000 ETP | Cu-ETP / CW004A | JIS C1100 reference; oxygen-bearing copper |
| C10100 OFE | Cu-OFE / CW009A | JIS C1011 reference; oxygen-free electronic grade |
| C10200 OF | Cu-OF / CW008A | JIS C1020 reference; distinct from C10100 |
| C14500 tellurium copper | CuTeP / CW118C | Tellurium-bearing machining copper; check full chemistry |
Product types and variants
| Variant | Drawing features to define |
|---|---|
| Stepped contact pins | Diameters, shoulder locations and contact finish |
| Hollow turned sleeves | Bore tolerance, wall thickness and concentricity |
| Copper flanges | Bolt pattern, face flatness and locating geometry |
| Electronic contact bases | Seating faces, mounting holes and coating zones |
| Thermal interface components | Contact area, surface texture and heat-transfer geometry |
| Vacuum-service component blanks | Drawing-defined geometry with separately agreed cleaning and testing |
Industrial applications
| Customer / industry | Potential component role | Engineering information required |
|---|---|---|
| Electrical OEMs | Conductive contacts and electronic interface parts | Exact grade, contact geometry and assembly validation |
| Electronic equipment builders | Selected vacuum and controlled-atmosphere components | Purity, cleaning, joining and leak-test requirements |
| Power electronics | Heat-transfer bases and high-conductivity interfaces | Flatness, mounting and cooling conditions |
| EPC and utility buyers | Specified OFE components within approved equipment | Project drawing and material acceptance requirements |
| Distributors | Documented C10100 turned component supply | Grade traceability, revision control and protective packing |
Manufacturing process
1. Engineering and purchase-order review
Review the material designation, stock form, dimensions, quantity and intended service together. Resolve incomplete thread notes, inaccessible burrs, conflicting tolerances and uncertain finish requirements. Establish the drawing revision and identify features requiring first-article approval. Any proposed material substitution or geometry change needs agreement before production begins.
2. Material selection and stock preparation
Select bar, plate or another suitable stock form against the approved material specification. Check the required certificate and condition, then plan cutting allowances and identification. Stock size affects machining waste and the commercial weight basis. Keep different copper grades segregated because their colour alone cannot reliably distinguish them.
3. CNC machining and feature completion
Program the sequence around the functional datums and practical tool access. Roughing removes excess material; finishing establishes critical diameters, faces and bores. Add drilling, tapping, slotting and milling as the geometry requires. Tool condition, chip removal and workholding must suit the selected copper rather than a generic metal-cutting setup.
4. Deburring, cleaning and surface treatment
Remove burrs at thread starts, drilled intersections and machined edges without damaging functional geometry. Clean away chips and process residues using an agreed method. Apply specified coatings with the required masking and dimensional allowance. For sensitive assemblies, define cleanliness acceptance and subsequent handling requirements explicitly in the order.
5. Final inspection and dispatch
Verify the agreed features in their required finished condition. Review dimensional results, material records and coating documentation against the purchase order. Identify accepted parts and protect them for shipment. Release documentation, packing lists and batch details should match the supplied items so receiving teams can trace each delivery to the correct specification.
Quality standards and certification requirements
Specify quality requirements for the actual component and intended market. ISO 9001 concerns a supplier’s management system; it does not certify an individual copper part for a current rating, pressure rating or equipment approval. Request the current certificate, issuing body, validity and manufacturing scope when certification is part of vendor qualification. Agree material documentation and dimensional reports before ordering. Restricted-substance declarations and coating evidence must cover the supplied material and finish, rather than a different alloy family.
| Requirement | Information to agree |
|---|---|
| Material conformity | Exact UNS or EN grade, applicable product standard, stock form, temper and batch documentation |
| Inspection documentation | Drawing revision, critical dimensions, acceptance limits and report format |
| EN 10204 documents | Specify the required document type and confirm availability for the selected supply route |
| Surface treatment | Coating system, thickness, masking, adhesion or other agreed acceptance checks |
| RoHS / REACH requirements | Applicable market requirements and evidence for the actual material and finish |
| Project approval | OEM, utility or EPC approval requirements for the complete assembly |
Why choose Brass Parts India?
Brass Parts India provides an Indian sourcing point for drawing-based metal components in the CNC and VMC machined parts range. The enquiry can combine the required copper grade, turning or milling features, finishing and inspection documentation under one technical specification. This is useful when an electrical OEM, EPC contractor, utility buyer or distributor needs comparable offers for several related parts. The published kilogram rate makes the starting commercial basis visible; the approved drawing and written quotation define the deliverable.
Price, quotation basis and ordering
Price: US$ 19.50/kg. The rate is stated per kilogram, not per individual component. A written quotation should identify the chargeable weight basis, drawing complexity, order quantity, machining operations, finish, inspection documents, packaging, freight and taxes. Confirm whether the price uses finished-part weight or another explicitly agreed basis. Do not calculate a final order value from a photograph or nominal bar size alone.
Related parts and internal product links
Compare this grade with the other copper CNC machined components, or discuss prismatic geometry through the copper VMC milling range. Material alternatives require engineering approval.
- C110 (C11000) ETP Copper Machined Parts and CNC Components
- Tellurium Copper (C14500) Machined Parts
- Copper CNC machined components
- Copper VMC milled components and parts
- Free-cutting brass CNC machined parts
- Lead-free brass CNC machined components
- Aluminum CNC turned parts
- Stainless steel 316 CNC machined parts
Equivalent product terms in other languages
Use these related purchasing terms together with C10100 and the controlled drawing. Translated search terms do not replace a material specification.
| Language | Related terms |
|---|---|
| Spanish | piezas de cobre mecanizadas CNC; componentes de cobre torneados; contactos eléctricos de cobre |
| Russian | медные детали с ЧПУ; точёные медные компоненты; медные электрические контакты |
| French | pièces en cuivre usinées CNC; composants en cuivre tournés; contacts électriques en cuivre |
| Portuguese | peças de cobre usinadas CNC; componentes de cobre torneados; contatos elétricos de cobre |
| Italian | parti in rame lavorate CNC; componenti in rame torniti; contatti elettrici in rame |
Frequently asked questions
What does OFE mean in C10100 copper?
OFE means oxygen-free electronic copper. UNS C10100 has a minimum copper content of 99.99% and a maximum oxygen content of 0.0005%, together with other impurity limits. State the exact product standard and condition when ordering so the material record matches the requirement.
Are C10100 and C10200 interchangeable?
They are separate oxygen-free copper grades with different purity and impurity requirements. C10200 OF copper should not be substituted for C10100 OFE solely because both are called oxygen-free. Compare the governing specifications and obtain engineering approval before accepting an alternative.
Are the parts supplied ready for vacuum service?
Vacuum suitability requires more than the alloy designation. Define cleaning, residue limits, handling, packaging, joining and any leak testing in the enquiry. These requirements must be agreed for the finished component; a material certificate alone cannot establish vacuum cleanliness or assembly performance.
What is the price per kilogram?
The listed price is US$ 19.50/kg. Request a written quotation confirming the chargeable weight basis, drawing complexity, quantity, machining, finish, inspection documents, packaging, freight and taxes. The kilogram rate is not a fixed per-piece price for every geometry.
Can you manufacture to our drawing?
Send the controlled drawing and revision, material specification, order quantity and STEP model if available. Identify critical dimensions, datums, mating interfaces, threads and finish requirements. Manufacturing feasibility and the inspection scope are confirmed against that information before an order is finalized.
What dimensional tolerance should we specify?
The general dimensional tolerance is ±0.05 mm where agreed. Critical dimensions, geometric tolerances, thread classes and surface roughness require individual drawing limits. State whether inspection applies before or after coating and identify dimensions affected by subsequent assembly or joining operations.
Which surface finishes can be requested?
Request a bare machined finish or a specified coating such as tin, silver or nickel, subject to application review and quotation. Define thickness, contact zones, masking and finished dimensions. The required electrical or corrosion behaviour must be assessed for the complete surface system.
What certificates and inspection records are available?
Agree the material certificate, dimensional report, coating evidence and traceability requirements with the quotation. Where a quality-system certificate is required, request its current scope and validity. Certification is not implied merely by listing an alloy, standard or possible industrial application.
Do the images show stocked components?
The images are representative product illustrations showing possible component forms. They do not prove alloy chemistry or stock availability. Supplied geometry, grade, dimensions, surface treatment and inspection requirements follow the approved drawing and purchase order.
How should distributors place repeat orders?
Quote the part number, drawing revision, exact material grade, quantity and agreed finish for each item. Include the previous approval reference and identify any changes. Keep similar-looking copper alloys on separate order lines and specify packaging labels when batch identification is required.
Request a technical quotation
Contact Brass Parts India for C101 OFE copper components. Send your drawing revision, exact material specification, quantity, finish, inspection requirements and destination. Reference the listed US$ 19.50/kg rate and request confirmation of the chargeable weight, manufacturing scope and delivery terms. Identify your critical interfaces so the technical review addresses the features that matter to your assembly.
