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Product Details
C84400 Leaded Red Brass Casting
C84400 Leaded Red Brass Casting
C84400 (UNS C84400, CDA 844, Leaded Red Brass) is an intermediate-composition leaded brass casting alloy containing approximately 80% copper, 9% zinc, 3% lead, and 3% tin. Positioned between LG2 red brass (C83600) and standard yellow brass (C85700), C84400 offers a balance of good corrosion resistance, high machinability, and moderate cost, making it widely used for plumbing hardware, gas fittings, valves, and general commercial castings where maximum dezincification resistance is not required but service in water and gas environments is expected.
Alloy Overview
C84400 (78–82% Cu) has sufficient copper content to resist dezincification in most municipal water supply conditions. The 2.5–3.5% lead content provides high machinability (80%+ CDA rating), enabling rapid CNC production of threaded fittings and complex valve bodies. The 2.0–3.5% tin addition improves pressure tightness and corrosion resistance in water service. Tensile strength is 230 MPa (sand cast), adequate for PN16–PN25 fitting applications.
Material Composition – C84400 Leaded Red Brass Casting
| Element | Min % | Max % | Typical % | Role |
|---|---|---|---|---|
| Copper (Cu) | 78.0 | 82.0 | 80.0 | Primary matrix, corrosion resistance |
| Zinc (Zn) | 7.0 | 10.0 | 9.0 | Strength, castability |
| Lead (Pb) | 2.5 | 3.5 | 3.0 | Machinability |
| Tin (Sn) | 2.0 | 3.5 | 3.0 | Corrosion resistance, pressure tightness |
| Nickel (Ni) | – | 1.0 | 0.3 | Minor toughness |
| Iron (Fe) | – | 0.30 | 0.10 | Impurity limit |
| Antimony (Sb) | – | 0.25 | – | Dezincification inhibitor |
| Phosphorus (P) | – | 0.05 | – | Deoxidant |
| Aluminium (Al) | – | 0.005 | – | Impurity limit |
| Silicon (Si) | – | 0.005 | – | Impurity limit |
Mechanical and Physical Properties
| Property | Sand Cast | Gravity Die Cast | Standard |
|---|---|---|---|
| Tensile Strength (MPa) | 230 min | 260 min | ASTM B584 / EN 1982 |
| 0.2% Yield Strength (MPa) | 75 min | 95 min | ASTM E8 |
| Elongation (%) | 18 min | 20 min | ASTM E8 |
| Hardness (HB) | 50–75 | ASTM E10 | |
| Density (g/cm³) | 8.75 | – | |
| Electrical Conductivity (%IACS) | 16–18 | ASTM B193 | |
| Thermal Conductivity (W/m·K) | 74 | – | |
| Melting Range (°C) | 855–980 | – | |
| Machinability Rating (%) | 80–90 | CDA (C36000=100%) | |
International Equivalent Grades
| Standard | Designation | Common Name |
|---|---|---|
| USA (UNS/ASTM B584) | C84400 / CDA 844 | Leaded Red Brass |
| Europe (EN 1982) | CC760S | CuZn15Pb3Sn2-C (nearest) |
| Germany (DIN 1705) | CuZn15Pb3Sn2-C | Bleirotguss |
| UK (BS 1400) | SCB3 | Semired Brass Casting |
| India (IS 318) | LTB2 | Leaded Tin Brass Grade 2 |
| Japan (JIS H5111) | YBsC1 | Yellow Brass Casting 1 |
| ISO | CuZn15Pb3Sn2-C | Leaded Tin Brass Casting |
Applications
C84400 castings are used in: plumbing fittings (compression fittings, tee pieces, couplings, reducers, elbows), gas valve bodies and burner fittings, water tap bodies, domestic and commercial valve bodies, electrical conduit fittings in standard environments, general purpose sand castings for hardware applications, and automotive fluid system components.
Casting Processes Available
| Process | Weight Range | Tolerance Class | Typical Use |
|---|---|---|---|
| Sand Casting | 0.05–200 kg | CT7–CT9 | Complex geometry, low–medium volume, large parts |
| Gravity Die Casting | 0.05–10 kg | CT5–CT7 | Medium–high volume, plumbing fittings, hardware |
| Pressure Die Casting | 0.01–2 kg | CT4–CT6 | High-volume thin-wall decorative and functional parts |
| Investment Casting | 0.01–5 kg | CT4–CT5 | Precision complex components, architectural hardware |
Pricing
US$ 11.50 per kilogram (CIF major port, indicative). Final price subject to casting process, part weight, complexity, order quantity, surface finish, and secondary machining. MOQ: samples from 1 piece; production from 50 pieces. Firm quotation within 24 hours on receipt of drawing or sample.
Quality and Certification
ASTM B584 (C84400); EN 1982 CC760S (nearest); IS 318 LTB2; ISO 9001:2015. Pressure tested to 1.5× WP for valve and fitting castings. ISO 9001:2015 certified production. EN 10204 3.1 material test certificates issued with every production batch confirming composition within specification limits.
Related Brass Casting Grades
- C85700 Yellow Brass Casting
- C46400 Naval Brass Casting
- C83600 Red Brass / LG2 Gunmetal Casting
- C86500 Manganese Bronze Casting
- Brass Castings – All Grades Overview
Request a Quote
Electrical Accessories India supplies C84400 Leaded Red Brass Casting castings. Price: US$ 11.50/kg. Email: info@elecaccs.com | www.elecaccs.com