C83600 Casting | CDA 836 Casting | Composition Bronze & Leaded Red Brass Castings

C83600 Casting | CDA 836 Casting | Composition Bronze & Leaded Red Brass Castings

C83600 Casting (also designated CDA 836, Composition Bronze, Leaded Red Brass, or ASTM B62 Bronze) is manufactured by Electrical Accessories India as precision sand castings, investment castings, centrifugal castings, and fully CNC-machined components. The C83600 alloy — UNS designation for the internationally recognized 85% Cu / 5% Sn / 5% Pb / 5% Zn quaternary bronze — is the most widely specified copper casting alloy in ASTM, AWWA, MSS, and ASME valve, pump, and fluid-system standards. Our C83600 / CDA 836 castings serve electrical OEMs, EPC contractors, power utilities, valve manufacturers, pump suppliers, and industrial distributors in over 40 export markets. Indicative price: US$ 13.90/kilogram (subject to quantity and specification).

Product Overview

C83600 / CDA 836: Standard Designation and Scope

C83600 is the UNS (Unified Numbering System) designation for Composition Bronze / Leaded Red Brass per ASTM B584. CDA 836 is the equivalent Copper Development Association designation used in North American engineering practice. Both designations reference exactly the same alloy: Cu 84–86%, Sn 4–6%, Pb 4–6%, Zn 4–6%. ASTM B62 provides the specific product standard for C83600 castings used in valve and fitting applications (pressure vessels, pipe fittings, flanges, and valve bodies), specifying additional hydrostatic pressure test requirements (300 psi / 20.7 bar) that distinguish B62 from the broader B584 compositional specification. The alloy is also covered by AWWA C800 (underground service line valves), MSS SP-80 (bronze gate, globe, angle, and check valves), and ASME B16.15 (cast copper alloy threaded fittings).

ASTM B62: The Premier Standard for C83600 Valve Castings

ASTM B62 — Standard Specification for Composition Bronze or Ounce Metal Castings — specifically addresses C83600 castings for pressure-retaining service in valves, fittings, and pump bodies. The standard mandates chemical composition within C83600 UNS limits, minimum mechanical properties (241 MPa tensile strength, 110 MPa yield, 20% elongation), and hydrostatic pressure test at 300 psi (20.7 bar) for all pressure-containing castings. ASTM B62-certified C83600 castings from Electrical Accessories India carry full compliance documentation including OES chemical analysis certificates, mechanical test reports, and pressure test records, enabling direct use in valve, pump, and fitting applications governed by ASME, AWWA, and MSS standards without additional qualification testing.

AWWA and Water Works Applications of CDA 836

CDA 836 (C83600) is the alloy of choice in AWWA C800 underground service line valves, curb stop valves, corporation stop valves, and angle meter valves used throughout municipal water distribution infrastructure. The alloy’s resistance to dezincification (low zinc content 5%), immunity to stress-corrosion cracking in soil environments, and pressure-tight casting properties ensure long-term leak-free performance in underground service at depths up to 2.5 meters. Utilities in the USA, UK, Australia, Middle East, and India specify CDA 836 / C83600 for water works valve castings by alloy designation in project specifications, enabling Electrical Accessories India to supply directly to AWWA-specified projects with full compliance documentation.

MSS SP-80 and General Service Bronze Valves

Manufacturers Standards Society SP-80 governs bronze gate, globe, angle, and check valves in sizes 1/4 inch to 2 inches for general water, steam, and gas service. MSS SP-80 designates C83600 (ASTM B62) as the preferred casting material for Class 125 and Class 150 valves. Electrical Accessories India supplies C83600 valve body castings (rough and finish-machined) to valve manufacturers worldwide for SP-80 compliant product ranges, providing gate valve body castings with integral flanges or threaded inlet/outlet connections per ASME B1.20.1 NPT or BSP thread specifications. Castings are supplied with hydrostatic test records and ASTM B62 MTRs as standard for MSS SP-80 valve projects.

CDA 836 in Electrical OEM Applications

Electrical Accessories India’s primary market for C83600 / CDA 836 castings is the electrical OEM sector, where the alloy’s combination of mechanical strength, corrosion resistance, non-sparking properties, and machinability makes it the standard for cable gland bodies, compression gland nuts, earth pit accessories, earthing clamps, grounding connector housings, neutral link bodies, busbar support brackets, terminal connector bodies, and switchgear internal components. CDA 836 cable gland castings conform to IEC 60423, BS 6121, and ATEX Directive 2014/34/EU requirements. The alloy’s non-magnetic property (permeability ~1.0) prevents interference with electromagnetic measurement and control equipment in substation and switchgear applications.

C83600 in Pump and Fluid Handling OEM Supply

Pump OEMs and after-market suppliers specify C83600 castings for impellers, wear rings, casing rings, bearing housings, stuffing box glands, and mechanical seal housings in centrifugal, reciprocating, and rotary pumps handling water, seawater, light hydrocarbons, and dilute chemical solutions. Electrical Accessories India’s pump casting portfolio includes rough-machined impellers balanced to ISO 1940 G6.3, bored bearing housings with diametral tolerances to H7, and stuffing box glands with ground bore surfaces to Ra 0.8 µm — supplied as direct drop-in replacements for OEM bronze pump parts with full dimensional and metallurgical traceability.

CDA 836 Marine and Defense Casting Applications

C83600 / CDA 836 castings meet requirements of MIL-B-16541 (US Military bronze casting specification), DEF STAN 02-824 (UK Royal Navy), and Classification Society (Lloyd’s, DNV-GL, Bureau Veritas, ABS) approvals for naval architecture and marine engineering applications. Applications include seacock bodies, sea-water strainer housings, through-hull fittings, bilge pump bodies, saltwater manifolds, and shipboard electrical junction box bodies. Electrical Accessories India can supply maritime-grade C83600 castings with Classification Society inspection and the relevant stamping/certification for new-build vessel projects and vessel refit/repair programs.

Key Features of C83600 / CDA 836 Castings

• Dual-designation: C83600 (UNS) = CDA 836 (Copper Development Association) — same alloy
• Compliant with ASTM B62, ASTM B584, AWWA C800, MSS SP-80, ASME B16.15
• 300 psi (20.7 bar) hydrostatic pressure test per ASTM B62 available
• Machinability 90% relative to C36000 free-cutting brass
• Non-sparking / non-magnetic for ATEX Zone 1 & 2 applications
• Dezincification-resistant (Zn <6%) — suitable for aggressive water service
• EN 10204 Type 3.1 material certificates with full traceability
• Custom DFM and first-article qualification within 6–8 weeks for new tooling

Dimensional Range and Weight Capacity

Electrical Accessories India produces C83600 / CDA 836 castings from 50 grams (small valve trim, investment cast connectors) to 500 kg (large pump casings and valve bodies) in a single piece. Sand casting envelope capacity extends to 1200 mm × 900 mm; investment casting to 400 mm maximum dimension. Machining capability covers components up to 800 mm diameter on CNC lathes and 600 mm × 600 mm on CNC milling centers. Custom sizes outside standard capacity range are available through partner foundry arrangements with full quality oversight and documentation by Electrical Accessories India.

Thread Forms and Fastening Standards

C83600 castings are supplied with NPT (ASME B1.20.1), BSP parallel (BS EN ISO 228), BSPT taper (BS 21), and metric ISO 965 threaded ports and connections — all machinable to full thread form quality using standard carbide tooling due to the alloy’s 90% machinability rating. Thread gauging per ISO 1502 (metric) or ANSI/ASME B47.1 (pipe threads) is performed on all production castings. Blind inserts (Helicoil, Keensert, Ensat) for upgrading to stainless steel threads are available as factory-fitted options for applications requiring stainless fastener compatibility with CDA 836 castings.

Chemical Resistance Data

C83600 resists: freshwater (all pH ranges), seawater, steam condensate, dilute sulfuric acid (<15%), dilute hydrochloric acid (<5%), organic solvents (petroleum, acetone, MEK), neutral salts, food-grade acids (citric, acetic at <30%), and refrigerants (R-134a, R-410A). C83600 is NOT suitable for: concentrated mineral acids, ammonia solutions (>1 ppm), mercury and mercury salts, acetylene, and oxidizing acids. Users are advised to perform corrosion testing for specific process media not listed in standard corrosion tables.

Technical Specifications – C83600 / CDA 836

C83600 / CDA 836 – International Equivalent Standards

Product Types and Variants

• ASTM B62 Valve Body Castings: Gate, globe, angle, check, and ball valve bodies — NPT or BSP threaded, pressure tested 300 psi
• AWWA C800 Underground Valve Castings: Corporation stops, curb stops, angle meter valves for water service
• MSS SP-80 General Service Valve Castings: Class 125 and Class 150 bronze valves — rough and finish machined
• Pump Component Castings: Impellers, casings, bearing housings, stuffing box glands — to OEM drawings
• Electrical Hardware Castings: Cable gland bodies, earthing clamps, terminal blocks — IEC/BS/ATEX compliant
• Custom Precision Castings: Per customer 2D/3D drawing — investment or sand cast — DFM consultation available

Applications by Industry

Manufacturing Process

All C83600 / CDA 836 castings are manufactured by Electrical Accessories India under ISO 9001:2015-controlled procedures. Raw material receipt includes supplier mill certificate review and incoming OES chemical verification. Induction furnace melting proceeds only after charge composition approval; pouring temperature is monitored by immersion thermocouple at ±10°C accuracy. Pattern equipment (machined aluminium or epoxy resin tooling, certified to CT8 accuracy) is maintained in a climate-controlled tooling store. Post-casting operations include fettling, shot blasting, and foundry-level visual and dimensional inspection. CNC machining (where specified) is performed on calibrated Fanuc/Siemens controlled equipment with tool offsets verified by first-article CMM measurement. Hydrostatic pressure testing (where required per ASTM B62 or customer spec) is conducted using calibrated hydraulic test rigs with certificate issuance. Dispatch documentation includes EN 10204 3.1 MTR, dimensional inspection report, pressure test certificate (if applicable), and REACH/RoHS declaration.

Quality Standards and Certifications

• ISO 9001:2015 – Certified Quality Management System
• ASTM B62 – Standard for Composition Bronze (C83600) Castings — pressure test compliant
• ASTM B584 – Chemical and mechanical specification for copper alloy sand castings
• AWWA C800 – Underground service line valves material compliance
• MSS SP-80 – Bronze gate, globe, angle, and check valve specification
• ASME B16.15 – Cast copper alloy threaded fittings
• EN 10204 Type 3.1 – Material test reports with third-party inspector option
• Lloyd’s Register / Bureau Veritas type approval available for marine projects

Why Choose Electrical Accessories India for C83600 / CDA 836 Castings

Electrical Accessories India’s dedicated copper-alloy foundry produces ASTM B62-compliant C83600 / CDA 836 castings with in-house OES chemistry verification, hydrostatic pressure testing, CMM dimensional inspection, and CNC precision machining under one roof. With ISO 9001:2015 certification and 20+ years of export supply experience to North America, UK, Europe, Australia, Middle East, and Southeast Asia, we deliver C83600 castings that conform to project specifications at competitive FOB India pricing. Our flexible MOQ policy (from 50 kg production batches), fast first-article lead times (6–8 weeks for new tooling), and comprehensive documentation make us the preferred casting source for ASTM/AWWA/MSS specification projects worldwide.

Frequently Asked Questions – C83600 / CDA 836 Casting

Q1: What does ASTM B62 require that ASTM B584 does not?

ASTM B62 is the product-specific standard for Composition Bronze (C83600) in valve and fitting applications. It adds hydrostatic pressure testing (300 psi / 20.7 bar) requirements for every casting, whereas ASTM B584 covers only chemical composition and general mechanical properties for copper alloy sand castings. B62 certification is required for AWWA, MSS, and ASME valve/fitting projects.

Q2: Are C83600 and CDA 836 exactly the same alloy?

Yes. C83600 is the UNS (Unified Numbering System) designation used in ASTM standards, while CDA 836 is the equivalent Copper Development Association designation. Both refer to the identical alloy composition (Cu84-86%, Sn4-6%, Pb4-6%, Zn4-6%) and the terms are completely interchangeable in engineering specifications.

Q3: Can C83600 castings be used for natural gas service?

Yes. C83600 / CDA 836 is approved for natural gas (dry) service per ASTM B62 and MSS SP-80 at pressures to 300 psi ambient temperature. For wet gas or sour gas (H2S) service, consult with the engineering team for additional review of stress-corrosion resistance requirements.

Q4: Do you supply castings with radiographic inspection?

Yes. Radiographic inspection per ASTM E505 Acceptance Levels 1–3 (or ASTM E272 for fine-grain castings) is available at additional cost for critical-service pressure components. DPI (dye penetrant inspection) per ASTM E165 is offered as standard for surface defect detection on all pressure-critical C83600 castings.

Q5: What is the lead time for ASTM B62-certified C83600 castings?

For repeat orders from established tooling: 3–5 weeks. For new tooling design, pattern fabrication, and first-article qualification: 6–8 weeks. Rush lead times (2–3 weeks from established tooling) may be available subject to foundry scheduling — contact us with your timeline requirements.

Q6: Can you supply C83600 castings in large production quantities?

Yes. Electrical Accessories India has foundry capacity for annual throughput of approximately 1,500 metric tons of copper-alloy castings. We routinely supply scheduled production orders from 500 kg/month to multi-tonne monthly programs for valve manufacturers, pump OEMs, and electrical hardware producers.

Q7: Do you offer design-to-casting DFM services?

Yes. Our technical team provides Design for Manufacturability (DFM) review of customer drawings, identifying opportunities for parting-line optimization, core reduction, wall thickness rationalization, and machining allowance standardization that reduce casting cost, tooling complexity, and lead time without compromising function.

Q8: What countries does Electrical Accessories India export C83600 castings to?

We export to USA, UK, Germany, Netherlands, Australia, UAE, Saudi Arabia, Singapore, Malaysia, South Africa, Nigeria, Kenya, Brazil, Canada, and India domestic market — covering 40+ countries with established shipping routes and distribution partner networks in key markets.

Multilingual Equivalent Terms – C83600 / CDA 836 Casting

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Request a Quote – C83600 / CDA 836 Castings

Electrical Accessories India is a leading manufacturer and exporter of ASTM B62 / B584 C83600 (CDA 836) composition bronze castings for valve, pump, marine, and electrical OEM applications. Submit your drawing (PDF, DWG, STP) or part BOM for a competitive quote within 24 business hours.

Indicative Price: US$ 13.90/kilogram (FOB India, subject to alloy verification, quantity, specification, and ASTM B62 test requirements. Contact us for exact project pricing.)

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