C87850 Brass Fittings and Brass Machined Parts

C87850 Brass Fittings and Brass Machined Parts

C87850 is a lead-free silicon-tin bronze alloy (also referred to in some contexts as an ECO-type silicon alloy) classified under ASTM B505 and B584 for sand, centrifugal, and permanent mold casting, with machined variants produced from continuously cast bar and rod stock. Electrical Accessories India manufactures C87850 precision machined fittings, valve components, plumbing fittings, and industrial parts for electrical OEMs, EPC contractors, power utilities, and global distributors. With lead content at or below 0.09%, C87850 meets NSF/ANSI 61, NSF/ANSI 372, California AB1953, and Vermont Act 193 regulations for lead-free plumbing fittings and potable water contact components. This alloy is widely adopted as a lead-free alternative to C83600 (85-5-5-5 Red Brass) and C84400 semi-red brass in plumbing, gas, and low-pressure hydraulic applications.

Product Overview

Alloy Composition and Physical Properties

C87850 is a copper-silicon-tin alloy containing approximately 56–60% copper, 1.5–3% silicon, and 1–3% tin, with lead restricted to ≤0.09% and zinc as the balance. The silicon addition provides strength and corrosion resistance, while tin enhances dezincification resistance and hardness. Compared to C83600 (leaded red brass), C87850 offers equivalent or superior corrosion resistance, better machinability than tin bronzes, and significantly lower lead content, meeting all current international lead-reduction mandates. The alloy’s tensile strength of 310–420 MPa (as-cast or wrought) and hardness of 60–80 HRB make it suitable for pressure-rated fittings and valve bodies in applications to 17 bar (250 psi) working pressure at temperatures up to 150°C. Electrical conductivity is approximately 8–12% IACS, lower than standard brasses but acceptable for grounding components and low-frequency electrical applications. Thermal conductivity is approximately 40–60 W/m·K.

C87850 Brass Fittings – Plumbing and Fluid Control

C87850 fittings produced by Electrical Accessories India include compression fittings, press-fit fittings, solder-joint end fittings, NPT and BSP threaded fittings, flare fittings, push-connect fittings, elbow fittings, tee fittings, union fittings, reducing couplings, and ball valve bodies. All fittings are dimensionally compliant with ASME B16.18, ASME B16.26, BS 864, EN 1254-1/2/3, and MSS SP-104 as applicable. Pressure ratings are verified by hydraulic proof testing at 1.5× rated working pressure per ASME B16.18. Thread tolerances are gauged with calibrated GO/NO-GO plug and ring gauges per ASME B1.20.1 (NPT) and ISO 228-1 (BSP). Fittings can be supplied in as-cast machined finish, bright machined, nickel plated, tin plated, or chrome plated per customer specification.

C87850 Brass Machined Parts – CNC Precision Components

Beyond standard fittings, Electrical Accessories India machines C87850 bar and rod stock into custom precision components including valve stems, bonnet nuts, packing glands, diaphragm plates, manifold blocks, hydraulic adapters, filter housings, instrument body blanks, flow orifice plates, and cable gland bodies. CNC turned components are produced to customer drawings with diameter tolerances of ±0.01–0.025 mm and surface finishes of Ra 0.8–3.2 µm. Multi-axis CNC machining centers allow complex geometries with cross-drilling, milling, chamfering, and internal threading in a single setup, minimizing handling and improving concentricity of bores to ODs. All machined blanks are 100% dimensionally inspected using CMM against first-article approved reference data.

Electrical and Industrial Enclosure Fittings

C87850 machined parts are used in electrical enclosure fittings, cable management systems, junction box glands, armoured cable fittings, and conduit fittings where lead-free compliance is required by project specifications or end-user environmental policies. The alloy’s hardness and corrosion resistance make it suitable for EMC cable glands, metric thread cable glands, and cable entry systems complying with IEC 61386 and IEC 62444. For EPC contractors and power utilities operating in coastal, industrial, and offshore environments, C87850 components provide improved salt-fog resistance (1000+ hours to ASTM B117) compared to standard leaded brass, reducing maintenance cycles and field failures. Components can be supplied with IP66/IP68 sealing systems as assembled units.

Gas and Low-Pressure Hydraulic Fittings

C87850 has been adopted as a preferred alloy for natural gas distribution fittings, LPG fittings, compressed air fittings, and low-pressure hydraulic adapters in markets where leaded brass is restricted. Street elbows, hex nipples, close nipples, barrel unions, check valve bodies, pressure regulator housings, and gas meter fittings are produced from C87850 continuously cast bar to ASTM B505 / B584 chemistry. Components comply with ASME B16.33 (manual gas valves), ASTM F2080 (compression fittings for CTS tubing), and EN 331 (manually operated ball valves for gas installations) dimensional and pressure requirements. Customer-specific assembly marking, date codes, and pressure ratings can be laser engraved or stamped per QA requirements.

Valve Bodies and Seats – Precision Machined C87850

C87850 is widely specified for ball valve bodies, gate valve bodies, globe valve bodies, check valve bodies, and butterfly valve discs in the 1/4–3 inch (6–80 mm) size range. Machined internal cavities, seat pockets, packing gland bores, and port threads are held to tight tolerances to ensure leak-free assembly with PTFE, EPDM, and nylon seats. Full-bore and reduced-bore ball valve bodies are bored, turned, faced, and threaded in CNC machining centers with cycle times optimized for medium-to-high volume production. Pressure testing at 1.5× rated WOG (Water, Oil, Gas) pressure per API 598 is performed on valve bodies before painting, coating, or sub-assembly. Material traceability from mill heat to finished valve body is maintained throughout production.

Custom and OEM Machined Components

For OEM and EPC customers with proprietary designs, Electrical Accessories India produces C87850 machined components against customer-supplied drawings in DXF, DWG, STEP, IGES, or PDF formats. Engineering review, DFM (Design for Manufacturability) feedback, and material substitution analysis (C83600 to C87850 transition) are provided as part of the new project onboarding process. Prototype samples are available in 10–15 working days; production tooling and fixtures are quoted separately. Serial production is supported by dedicated tooling, process control plans (PCPs), and inspection plans aligned to APQP or equivalent quality frameworks.

Pricing

C87850 Brass Machined Parts and Fittings: US$ 11.50/kilogram (subject to order quantity, casting/machined form, geometry complexity, and surface finish requirements. MOQ: 50 kg. Volume pricing available for annual contracts ≥500 kg.)

Key Features

• Lead content ≤0.09% – fully NSF 61, NSF 372, RoHS, AB1953, and Vermont Act 193 compliant
• Equivalent corrosion performance to C83600 red brass without lead contamination risk
• Pressure-rated to 17 bar (250 psi) at 150°C for plumbing and gas fittings
• Compatible with copper tube (solder joint), press-fit, compression, and NPT/BSP threaded systems
• Available in as-machined, tin plated, nickel plated, and chrome plated finishes
• Full hydraulic proof test documentation supplied with pressure-rated fittings
• NSF 61 certification available on standard fitting geometries

Lead-Free and Environmental Compliance

C87850 is one of the most compliant lead-free copper alloys available for plumbing, gas, and potable water applications. Lead content at ≤0.09% exceeds the requirements of NSF/ANSI 372 (≤0.25% weighted average), California AB1953 (Proposition 65 low-lead), Vermont Act 193, and Maryland HB 372. For electrical and electronic assembly applications, C87850 satisfies EU RoHS Directive 2011/65/EU (Annex IV exemptions for copper alloys may apply, but C87850 typically qualifies without exemption given its ultra-low lead content). REACH SVHC declarations and third-party laboratory test reports are available on request.

Corrosion Resistance in Aggressive Environments

C87850’s silicon and tin content provides resistance to dezincification, selective leaching, and uniform corrosion in chlorinated water supplies, seawater, brackish water, and industrial process fluids. Salt fog resistance to ASTM B117 (1000 hours) exceeds standard CuZn39Pb3 performance. For coastal EPC projects, offshore platform installations, marine electrical systems, and desalination plant fittings, C87850 provides reliable long-term performance without the dezincification risk associated with standard alpha-beta brasses.

Machinability and Manufacturing Flexibility

Although C87850 is classified primarily as a casting alloy, wrought continuously cast bar stock is available and machineable on CNC lathes and machining centers with carbide tooling. Machinability is rated at approximately 40–50% of C36000, requiring attention to tooling geometry (positive rake angles, sharp cutting edges) and controlled feed rates. Wrought C87850 bar offers tighter dimensional control than cast blanks, enabling higher precision machined components with reduced wall thickness variation compared to sand or die cast parts.

Pressure Rating and Structural Integrity

Machined C87850 fittings and valve bodies are pressure tested per applicable standards (ASME B16.18, API 598, EN 12266). Proof test pressure is typically 1.5× maximum allowable working pressure (MAWP). For gas applications, leak testing with nitrogen or helium at rated pressure is performed. Dimensional wall thickness is verified by ultrasonic testing (UT) on critical pressure-retaining components. Burst pressure test data (up to 5× MAWP) is available on request for new fitting geometries.

Custom Marking and Traceability

All C87850 fittings and machined parts can be marked with size designation, material code, pressure rating, manufacturer’s mark, and batch/lot number per ASME B16.18 or customer specification. Marking methods include raised cast lettering (for cast blanks), CNC engraving, dot peening, and laser marking. Full lot traceability from raw material heat number to finished part is maintained in our MRP system and available for customer audit.

Technical Specifications

International Equivalent and Related Alloys

Product Types and Variants

Applications by Industry

Manufacturing Process

Raw Material: C87850 bar stock sourced from mills certified to ASTM B505/B584. Incoming OES (optical emission spectrometry) verification of Pb ≤0.09% before production release.

Machining: CNC turning centers and machining centers with carbide tooling (positive rake geometry). In-process SPC gauging on critical dimensions. First article inspection (FAI) per AS9102 or customer requirements.

Pressure Testing: Hydrostatic proof test at 1.5× MAWP on all pressure-rated fittings. Gas leak test (nitrogen/helium) for gas-service components.

Surface Treatment: As-machined, tin plated (5–12 µm ASTM B545), nickel plated (5–25 µm ASTM B689), or chrome plated per customer specification.

Inspection & Documentation: Dimensional report, hydrostatic test record, EN 10204 3.1 mill cert, NSF 61 compliance declaration, and CoO supplied per order.

Quality Standards and Certifications

Why Choose Electrical Accessories India

• Lead-free expertise: Dedicated C87850 machining lines with OES chemical verification at incoming stage.
• Pressure-rated fittings: In-house hydrostatic testing at 1.5× MAWP with full test records.
• NSF 61 supply chain: Documentation package supporting customer NSF certification audits.
• Custom machining: OEM components from customer drawings, DFM support, FAI in 10–15 days.
• Global export: Experienced in USA, Europe, Australia, Middle East, and SE Asia supply.

Frequently Asked Questions (FAQ)

1. What is C87850 and why is it used instead of C83600?

C87850 is a lead-free silicon-tin bronze alloy with Pb ≤0.09%, developed to replace C83600 (85-5-5-5 red brass, Pb ~5%) in potable water, gas, and food-contact applications where lead contamination is prohibited. It offers comparable mechanical strength and corrosion resistance without the environmental and health risks of lead.

2. Are C87850 fittings NSF 61 certified?

C87850 as an alloy meets the chemical composition requirements for NSF/ANSI 61 and NSF/ANSI 372 low-lead compliance. Individual fitting geometries require NSF listing under the manufacturer’s certified product range. We can supply NSF 61 compliance declarations and test reports for standard fitting sizes.

3. What is the maximum working pressure for C87850 fittings?

C87850 fittings for standard plumbing applications are rated to 17 bar (250 psi) at 150°C per ASME B16.18. Higher pressure ratings are achievable with increased wall thickness; custom pressure-rated designs can be engineered on request.

4. Can C87850 parts be used in seawater applications?

Yes. C87850’s silicon and tin content provides good resistance to seawater corrosion and dezincification, making it suitable for marine fittings, offshore cable glands, and coastal installation hardware. Salt fog testing to ASTM B117 (1000 hours) is available on request.

5. What thread standards are available on C87850 fittings?

Standard thread forms available include NPT (ASME B1.20.1), BSPT, BSP (ISO 228-1/BS 21), metric (ISO 965), UN/UNF (ASME B1.1), and PG threads (DIN 40430) depending on fitting type and application.

6. What is the MOQ for C87850 machined parts?

Standard MOQ is 50 kg per part number. For custom designs, tooling costs may apply for fixtures or special tooling. Volume pricing is available for annual contract volumes of 500 kg and above.

7. Is C87850 compatible with solder jointing?

Yes. C87850 solder-joint end fittings are compatible with lead-free solder (SAC305, ASTM B32 Grade Sb5, or equivalent) and traditional tin-lead solder where permitted. Joint quality should be per BS EN 1254 or ASTM B828 requirements.

8. What documentation is provided for regulatory compliance?

Supplied documentation includes EN 10204 3.1 mill certificate, OES chemical analysis report, NSF/ANSI 372 compliance declaration, RoHS declaration, hydrostatic test record (for pressure fittings), and certificate of origin.

9. Can C87850 valves be supplied as complete assemblies?

Yes. Electrical Accessories India can supply ball valve bodies machined in C87850 with stainless steel balls, PTFE seats, and chrome-plated brass stems as complete valve assemblies. Custom handle and actuator configurations are available.

10. What is the lead time for C87850 fittings?

Standard fittings in common sizes (1/4″–2″ BSP/NPT) typically have a 4–6 week lead time from order confirmation. Non-standard and custom machined parts have a 6–10 week lead time including FAI approval.

Equivalent Terms in Major Languages

Related Products and Linked Terms

• C69300 ECO Brass Machined Parts
• Brass CNC Machined Parts
• Brass Screw Machine Parts
• Brass Turned Parts & Components
• CZ121 Brass Turned Parts
• CW614N Brass Components and Parts
• CuZn39Pb3 Brass Parts & Components
• Brass Hot Forged Parts
• Copper Machined Parts
• Stainless Steel 316 Turned Parts

Request a Quote – C87850 Brass Fittings and Machined Parts

Electrical Accessories India manufactures C87850 lead-free brass fittings, valve bodies, and precision machined parts for plumbing, gas, electrical OEM, and industrial applications. Indicative pricing: US$ 11.50/kilogram (quantity, form, and geometry dependent). Submit your drawing or specification for a formal quotation within 24–48 hours.

📧 Email: info@elecaccs.com | 🌐 Website: www.elecaccs.com