Brass Investment Casting & Lost Wax Casting — Precision Brass Components
Brass Parts India specializes in Brass Investment Casting and Brass Lost Wax Casting — two of the most precise and reliable casting processes for manufacturing complex brass components with tight tolerances, superior surface finish, and excellent dimensional accuracy.
Our investment casting foundry in India produces intricate brass parts that are difficult or impossible to machine from solid. From prototypes to high-volume production runs, we deliver consistent quality meeting international standards including ASTM, BS, DIN, and IS specifications.
What is Brass Investment Casting (Lost Wax Casting)?
Investment casting, also known as the lost wax process, is a precision casting method where a wax pattern is coated with a ceramic refractory shell, the wax is melted out, and molten brass is poured into the resulting cavity. This yields near-net-shape components with exceptional detail, dimensional stability, and smooth surface finish.
The Lost Wax Casting Process — Step by Step
- Wax Pattern Creation: A precise wax replica is made via injection moulding.
- Assembly into Tree: Patterns are assembled onto a central sprue.
- Ceramic Shell Building: The tree is dipped in ceramic slurry and coated with refractory sand.
- De-Waxing (Burnout): Shell is heated to drain the wax, leaving a hollow mould.
- Brass Pouring: Molten brass alloy is poured into the preheated mould.
- Shell Removal & Finishing: Ceramic shell is broken away; castings are cleaned and finished.
- Quality Inspection: Dimensional check and surface testing to customer spec.
Brass Alloys Used in Investment Casting
- Alpha Brass (CW508L / CZ106): High copper content; ideal for decorative and architectural castings.
- Naval Brass (CW712R / CZ112): Excellent corrosion resistance for marine hardware and valves.
- High Tensile Brass (HTB): Superior strength and wear resistance for heavy-duty components.
- Leaded Brass (CW614N / CZ121): Free-machining; ideal for components requiring post-cast machining.
- DZR Brass: Superior dezincification resistance for aggressive water and plumbing applications.
Key Advantages
- Near-net-shape parts with minimal machining required
- Exceptional dimensional accuracy (CT4–CT6 per ISO 8062)
- Superior surface finish (Ra 1.6–6.3 μm as-cast)
- Ability to cast complex geometries, internal passages, and thin walls
- Wide range of brass and copper-base alloys available
- Consistent quality across high-volume production runs
Applications
- Valves & Fittings: Ball valves, gate valves, globe valves, pipe fittings
- Plumbing & Sanitary: Taps, faucets, bib cocks, compression fittings
- Electrical & Electronics: Terminal blocks, connectors, earthing clamps
- Marine Hardware: Cleats, blocks, hinges, deck fittings
- Automotive: Fuel system parts, sensor housings, carburettor components
- Decorative & Architectural: Door handles, locks, knobs, medallions
Technical Specifications
| Parameter | Specification |
|---|---|
| Weight Range | 10 grams to 25 kg |
| Dimensional Tolerance | ±0.1 mm (CT4–CT6 per ISO 8062) |
| Surface Finish (as-cast) | Ra 1.6 to 6.3 μm |
| Wall Thickness (minimum) | 1.5 mm |
| Alloys Available | CW614N, CW508L, CW712R, DZR Brass, HTB, Naval Brass |
| Annual Capacity | 500+ MT per annum |
| Quality Standard | ISO 9001:2015 | ASTM | BS | DIN | IS |
Frequently Asked Questions
Q1. What is the difference between investment casting and lost wax casting?
They are the same process. “Lost wax casting” describes the historic technique; “investment casting” is the modern industrial term. Both are used interchangeably in industry.
Q2. What is the minimum order quantity for brass investment castings?
We accept orders from prototype quantities (1–10 pieces) through to high-volume production of millions per annum. MOQ varies by complexity and part weight. Contact us with your drawing for a quotation.
Q3. Can you supply machined and finished investment castings?
Yes. We offer CNC machining, drilling, tapping, surface finishing (polishing, plating, lacquering), pressure testing, and assembly. Supply in as-cast, semi-machined, or fully finished condition.
Q4. What quality certifications do you hold?
We hold ISO 9001:2015 certification. Castings are produced per ASTM, BS, DIN, and IS standards. Material test certificates (MTC), dimensional reports, and third-party inspection available on request.
Q5. What is the typical lead time?
Tooling development: 2–4 weeks. First article samples: 4–6 weeks. Production orders: 4–8 weeks after sample approval.
Q6. Do you offer DZR brass investment castings for potable water?
Yes. We manufacture DZR brass investment castings compliant with BS EN 12165 and WRAS/KIWA requirements for potable water systems — used in water meters, valves, and plumbing fittings.
Related Terms
Brass precision casting | Copper alloy investment casting | Lost wax brass foundry India | Near-net-shape brass components | Ceramic shell casting | Brass casting exporter India | Brass valve casting | Brass pump casting | Custom brass investment casting | CW614N investment casting | Naval brass lost wax casting | DZR brass investment casting
Contact Brass Parts India today with your drawings or samples for a competitive quotation within 24 hours.
