Product
Product Details
Copper Casting High Conductivity
Copper Casting High Conductivity
Pricing: US$ 15.80 / Kilogram (FOB India | MOQ: 50 Kg | All alloys and casting processes available)
Electrical Accessories India manufactures and exports high-conductivity copper castings in all standard alloys—pure copper (C81100, C80100), chromium copper (C81500), zirconium copper (C15000), beryllium copper (C82000, C82500), and leaded copper casting alloys (C83300, C84500)—produced by sand casting, gravity die casting, pressure die casting, investment casting (lost wax), and centrifugal casting processes. Applications include resistance welding electrode holders, electrical switch contacts, bus-bar connectors, motor commutator segments, induction heating coils, solenoid plunger cylinders, and transformer winding supports. With electrical conductivity ranging from 40% IACS (C82500 beryllium copper) to ≥98% IACS (C81100 pure copper), these castings are specified by electrical OEMs, EPC contractors, power utilities, and specialty industrial manufacturers across North America, Europe, the Middle East, and Asia-Pacific.
Product Overview – High-Conductivity Copper Castings
High-conductivity copper castings—also specified as copper alloy castings, cast copper components, copper foundry parts, copper investment cast parts, copper die cast components, copper sand cast parts, copper centrifugal castings, copper permanent mold castings, copper lost wax castings, and copper precision castings—are manufactured from copper alloys with electrical conductivity exceeding 40% IACS to produce complex-shaped components that cannot be economically produced by forging, machining, or extrusion alone. The casting route enables internal passages, undercuts, complex curvatures, and large dimensions not achievable in wrought copper products.
Pure Copper Castings (C81100, C80100) – ≥98% IACS
Pure copper castings (UNS C81100/C80100, EN CC040A, BS CC1) deliver electrical conductivity ≥98% IACS—the highest achievable in any copper alloy casting. Applications: bus-bar connector inserts with cast internal channels, electrical terminal lugs for HV cable sealing ends, current-carrying main contacts in moulded case circuit breakers (MCCBs), heavy-duty earthing terminal castings for substation equipment, high-current switch contacts in automatic transfer switches (ATS), and cast anode holders in electrolytic refining. Pure copper casting requires oxide-free melting under inert atmosphere and controlled solidification (directional/chilled) to minimize porosity and hot-tearing.
Chromium Copper Castings (C81500) – 75–85% IACS
Chromium copper (C81500, CuCr1, EN CW105C) castings contain 0.6–1.2% chromium and deliver 75–85% IACS conductivity combined with tensile strength up to 550 MPa after precipitation hardening (solution anneal + age at 400–450°C). This alloy is the standard choice for: resistance welding electrode holders (spot, seam, projection welding), induction heating coil segment castings, thermal spray gun nozzle bodies, busbars with integral cooling channels, commutator riser castings, current-carrying contact bridges in LV and MV contactors, and high-current terminal blocks in industrial switchgear. C81500 retains hardness and strength up to 400°C—essential for resistance welding electrode applications.
Beryllium Copper Castings (C82000, C82500) – 40–50% IACS
Beryllium copper castings (C82000: CuBe0.5Co2.5, EN CW111C; C82500: CuBe2, EN CW101C) provide the highest strength of any copper alloy (tensile 1,000–1,400 MPa aged), combined with 40–50% IACS conductivity. Used for: precision spring contacts in high-reliability electrical connectors, contact bridge castings in circuit breakers and motor contactors, wear-resistant switch rocker components, non-sparking tooling castings for explosive atmosphere electrical maintenance, and bearing cages in precision electrical motors. Note: beryllium copper machining requires controlled dust management per OSHA/NIOSH guidelines (SDS supplied with all orders).
Zirconium Copper Castings (C15000) – 90–95% IACS
Zirconium copper (UNS C15000, CuZr0.15, EN CW120C) castings deliver 90–95% IACS conductivity with tensile strength up to 400 MPa (aged). Specified for resistance welding electrode holders requiring higher conductivity than C81500, spot welding gun arm castings, cast bus connectors in EV battery pack assemblies, and continuous casting mold components. C15000 offers better creep resistance than pure copper at elevated temperatures (above 250°C), preferred for high-cycle spot welding applications.
Leaded Copper Casting Alloys (C83300, C84500) – 40–65% IACS
Leaded red brass (C83300: 93% Cu-1.5Sn-1.5Pb-4Zn) and semi-red brass (C84500: 78% Cu-3Sn-7Pb-12Zn) castings provide 40–65% IACS conductivity with excellent machinability and pressure tightness for: electrical junction box housing castings, service entrance fitting castings, meter socket body castings, conduit body castings, bus support insulator bracket castings, and terminal lug housings for switchgear. These alloys are preferred for complex-shaped electrical fittings where machined internal passages and threads are required.
Casting Process Selection
Sand casting: large, complex shapes with internal passages (transformer terminal blocks, large bus connectors)—tolerances ISO CT9–CT12, Ra 6.3–25 μm. Permanent mold/gravity die: medium complexity, higher accuracy (ISO CT7–CT9), better surface finish (Ra 3.2–6.3 μm)—electrode holders, contact bridge castings. Pressure die casting: high-volume, thin-wall, close-tolerance parts (Ra 1.6–3.2 μm)—connector housings, terminal block inserts. Investment casting (lost wax/ceramic shell): complex precision castings (ISO CT4–CT7, Ra 1.6–3.2 μm)—precision contact castings, induction coil segments, aerospace electrical parts. Centrifugal casting: cylindrical/ring castings (bus ring connectors, commutator rings, solenoid plunger cylinders) with superior density and mechanical properties.
Heat Treatment – Precipitation Hardening
Chromium copper (C81500) and beryllium copper (C82000, C82500) achieve optimal conductivity/strength balance through: (a) Solution annealing: 900–1000°C (C81500) or 760–800°C (C82000/C82500) in inert atmosphere, water quench; (b) Aging: 400–450°C/2–4 h (C81500), 315–330°C/2–3 h (C82500), producing fine precipitates that increase hardness while restoring conductivity. Our in-house heat treatment furnaces with programmable temperature profiles and inert atmosphere control ensure reproducible results, verified by hardness and conductivity testing per batch.
Post-Cast CNC Machining
Critical interfaces (mating flanges, thread boss locations, contact pad surfaces) are CNC-machined in-house to ±0.05–0.10 mm standard (±0.02 mm precision grade) on CMM-verified copper casting assemblies. Post-cast operations: electrode holder taper bore machining, contact bridge surface lapping (Ra ≤ 0.4 μm), bus connector bolt hole drilling and tapping (6H tolerance), and surface grinding of sealing faces. In-house CMM verification against customer 3D models (STEP/IGES) is standard for critical castings.
Key Features
- All high-conductivity alloys: C81100, C81500, C15000, C82000, C82500, C83300, C84500, and custom
- All casting processes: sand, gravity die, pressure die, investment, centrifugal casting
- Conductivity range: 40% IACS (C82500) to ≥98% IACS (C81100)
- Tensile strength range: 200 MPa (C81100 annealed) to 1,400 MPa (C82500 aged)
- In-house precipitation hardening heat treatment for C81500, C82000, C82500, C15000
- Post-cast CNC machining to ±0.02 mm; CMM verification
- EN 10204 3.1 MTCs; ISO 9001:2015; X-ray inspection capability
- Prototype castings in 3–6 weeks (including pattern fabrication)
Technical Specifications
| Parameter | Specification |
|---|---|
| Product | Copper Casting High Conductivity – All Alloys and Casting Processes |
| Casting Processes | Sand casting, gravity die, pressure die, investment casting, centrifugal casting |
| Alloys Available | C81100, C81500, C82000, C82500, C15000, C83300, C84500, custom alloys |
| Conductivity Range | 40% IACS (C82500) to ≥98% IACS (C81100) |
| Tensile Strength Range | 200–1,400 MPa (alloy and temper dependent) |
| Dimensional Tolerance | ISO CT4–CT12 (casting); ±0.02 mm (post-cast CNC) |
| Surface Finish (as-cast) | Ra 1.6 μm (investment) – Ra 25 μm (sand) |
| Max Casting Weight | Up to 500 kg (sand casting) |
| Heat Treatment | Solution anneal + age (precipitation hardening alloys) |
| Pricing | US$ 15.80 / Kilogram (FOB India) |
Alloy Properties and International Equivalents
| UNS (USA) | EN/DIN (Europe) | BS (UK) | Description | Conductivity (%IACS) | Tensile (MPa, aged) |
|---|---|---|---|---|---|
| C81100 / C80100 | CC040A | CC1 | Pure copper casting | ≥98 | 200–250 |
| C81500 | CW105C | CC2 | Chromium copper (1% Cr) | 75–85 | 450–550 |
| C15000 | CW120C | CZ121S | Zirconium copper (0.15% Zr) | 90–95 | 350–400 |
| C82000 | CW111C | CB102 | Beryllium copper (0.5% Be, 2.5% Co) | 45–55 | 700–900 |
| C82500 | CW101C | CB101 | Beryllium copper (2% Be) | 40–50 | 1000–1400 |
| C83300 | CC493K | LG2 | Leaded red brass (93Cu-1.5Sn-1.5Pb-4Zn) | 55–65 | 240–280 |
| C84500 | CC499K | LG4 | Semi-red brass (78Cu-3Sn-7Pb-12Zn) | 40–55 | 200–250 |
Product Types / Casting Process Variants
| Casting Process | Typical Alloys | Tolerance Class | Surface Ra | Applications |
|---|---|---|---|---|
| Sand Casting | C81100, C81500, C83300 | ISO CT9–CT12 | 6.3–25 μm | Large bus connectors, earthing terminals, transformer blocks |
| Gravity Die (Permanent Mold) | C81500, C82000, C83300 | ISO CT7–CT9 | 3.2–6.3 μm | Electrode holders, contact bridges, commutator risers |
| Pressure Die Casting | C83300, C84500 | ISO CT5–CT7 | 1.6–3.2 μm | Connector housings, terminal inserts, DIN fittings |
| Investment Casting | C81500, C82500, C81100 | ISO CT4–CT7 | 1.6–3.2 μm | Precision contact castings, induction coil segments, aerospace parts |
| Centrifugal Casting | C81100, C81500, C83300 | ISO CT7–CT9 | 3.2–6.3 μm | Bus rings, commutator rings, solenoid plunger cylinders |
Applications by Industry
| Industry | Application |
|---|---|
| Power Transmission and Distribution | Cast bus connectors, cast terminal blocks, earthing terminal castings, transformer winding support castings |
| Resistance Welding Equipment | C81500 electrode holders, spot/seam welding gun arm castings, welding transformer secondary connector castings |
| Electrical Motors and Generators | Commutator riser castings, slip ring castings, motor brush holder castings, field coil terminal castings |
| Induction Heating | Induction coil segment castings (water-cooled), coil support castings, work coil clamp castings |
| Switchgear and Controlgear | Contact bridge castings (LV/MV contactors), switch rocker castings, bus support bracket castings |
| Renewable Energy (EV/Solar) | EV battery bus ring castings, DC combiner bus connector castings, EV charging connector body castings |
| Defence and Aerospace | Non-sparking tool castings (C82500), EMI shielding enclosure castings, precision connector body castings |
| Marine and Offshore | Shore power terminal castings, hull bonding clamp castings, marine switchgear bus connector castings |
Manufacturing Process
High-conductivity copper castings are produced through a controlled multi-step process. (1) Alloy Preparation and Melting: cathode copper and master alloys (Cr, Zr, Be, Sn, Pb) are charged to induction melting furnaces; pure copper is melted under charcoal or nitrogen blanket at ±5°C temperature control. (2) Casting: pouring temperature, mold pre-heat, and cooling rate controlled per alloy specification; directional solidification and chills used for pure copper to minimize porosity. (3) Knockout and Cleaning: shot blasting, grinding, and manual cleaning; runner/riser removal. (4) Heat Treatment: solution anneal and age for C81500, C82000, C82500, and C15000 in controlled-atmosphere furnaces; hardness and conductivity verified per batch. (5) CNC Machining: critical surfaces machined in-house to drawing tolerance; CMM inspection. (6) Quality Inspection: visual, dimensional (CMM), conductivity (eddy-current per ASTM E1004), hardness (Rockwell/Vickers), X-ray (if specified per ASTM E94), dye-penetrant (ASTM E165). (7) Packing and Documentation: individually tagged, VCI wrapped, wooden box; EN 10204 3.1 MTC, dimensional report, conductivity certificate.
Quality Standards and Certifications
| Standard | Scope |
|---|---|
| ISO 9001:2015 | Quality Management System |
| ASTM B505 / BS EN 1982 | Copper alloy castings – composition and mechanical properties |
| ASTM E1004 | Eddy-current electrical conductivity testing |
| ASTM E8 / ISO 6892-1 | Tensile testing of metallic materials |
| ASTM E94 / EN 12681 | Radiographic examination of castings (on request) |
| ASTM E165 / EN ISO 3452 | Liquid penetrant inspection for surface cracks |
| EN 10204 Type 3.1 | Material test certificate |
| RoHS 2 / REACH | Hazardous substance compliance; Be-Cu SDS supplied |
Why Choose Electrical Accessories India for High-Conductivity Copper Castings?
Electrical Accessories India operates sand casting, gravity die, and investment casting facilities dedicated to high-conductivity copper alloys, supported by in-house heat treatment furnaces, CNC machining centres, and a fully equipped quality laboratory. We offer: US$ 15.80/kg FOB India; alloy selection expertise across the full high-conductivity copper casting spectrum; precipitation hardening heat treatment in-house; post-cast CNC machining to ±0.02 mm; X-ray and DPI inspection capability; EN 10204 3.1 MTCs; prototype castings in 3–6 weeks (including pattern/die fabrication); and global export to USA, UK, Germany, UAE, Australia, France, Canada, Singapore, and South Africa.
Frequently Asked Questions (FAQ)
Q1. What alloys are available for high-conductivity copper castings?
We cast: pure copper (C81100/C80100, ≥98% IACS), chromium copper (C81500, 75–85% IACS), zirconium copper (C15000, 90–95% IACS), beryllium copper (C82000, 45–55% IACS; C82500, 40–50% IACS), leaded red brass (C83300, 55–65% IACS), semi-red brass (C84500, 40–55% IACS), and custom alloys per customer specification.
Q2. What casting processes are available?
Sand casting, gravity die (permanent mold), pressure die casting, investment casting (lost wax/ceramic shell), and centrifugal casting. Process selection depends on alloy, part complexity, required tolerance class, surface finish, and production volume. Our technical team advises on the optimal process for each application.
Q3. What is the conductivity of resistance welding electrode holder castings?
C81500 chromium copper (standard for welding electrode holders) delivers 75–85% IACS after precipitation hardening, providing the optimal balance of conductivity and strength/hardness (to resist deformation under welding force). Higher-conductivity C15000 (90–95% IACS) is available where minimum electrode heating is the priority.
Q4. Can you supply castings to customer drawings?
Yes. We accept DXF, DWG, STEP, IGES, and PDF customer drawings. Foundry and machining engineers review for manufacturability within 48 hours and provide formal quotation including pattern/die cost, unit price, and lead time.
Q5. What is the minimum order quantity?
Sand casting: 1 piece (prototype), 10 pieces (production). Gravity die: 25 pieces (new die). Investment casting: 10 pieces. Centrifugal: 5 pieces. Pattern/die cost is quoted separately for new tooling and is amortized over production quantities.
Q6. Do you provide EN 10204 3.1 material test certificates?
Yes. EN 10204 Type 3.1 certificates covering chemical composition, tensile strength, hardness, and electrical conductivity are standard with every production lot. Third-party inspection by SGS, Bureau Veritas, or TÜV can be arranged for export orders above 500 kg.
Q7. Are beryllium copper castings safe to machine?
Beryllium copper machining requires wet machining and dedicated dust collection per OSHA/NIOSH guidelines (beryllium is a classified carcinogen). Our machining facility is certified for beryllium copper processing. Material Safety Data Sheets (MSDS/SDS) are supplied with all beryllium copper orders.
Q8. What is the lead time for copper castings?
With existing pattern/tooling: 4–6 weeks. New pattern/die fabrication: add 3–6 weeks. Prototype (1–5 pieces) from stock alloy: 3–4 weeks. Express service for repeat orders: 3–4 weeks.
Multilingual Equivalent Terms
| Language | Equivalent Terms |
|---|---|
| Spanish | Fundición de cobre alta conductividad, Piezas fundidas de cobre, Cobre cromo fundición |
| Russian | Медное литьё высокой проводимости, Хромовая медь литая, Литые медные детали |
| French | Moulage de cuivre haute conductivité, Pièces moulées en cuivre, Cuivre chromé moulé |
| Portuguese | Fundição de cobre alta condutividade, Peças fundidas de cobre, Fundição de cobre cromo |
| Italian | Fusione di rame ad alta conduttività, Componenti fusi in rame, Rame al cromo fuso |
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Request a Quote – Copper Casting High Conductivity
Electrical Accessories India | Manufacturer & Exporter of High-Conductivity Copper Castings
Email: info@elecaccs.com | Website: elecaccs.com
Price: US$ 15.80 / Kilogram (FOB India)
Lead Time: 4–8 weeks (new tooling); 3–6 weeks (repeat orders) | MOQ: 50 Kg
Submit your drawing, specification, or sample casting for a technical quotation within 48 business hours. We serve clients across India, USA, UK, Germany, UAE, Australia, Canada, Singapore, South Africa, France, Italy, and Spain.