Precision lost-wax casting from 10g to 50kg in stainless, carbon, and alloy steels. ±0.1mm tolerance, near-net shape, ISO 9001:2015 certified suppliers. Trusted by automotive Tier-1s, aerospace, medical device, and industrial machinery OEMs across 30+ countries.
Investment casting — also called lost-wax casting or precision casting — is the manufacturing process of choice when your part demands intricate geometry, tight tolerances, or premium surface finish that machining alone can't deliver economically.
Magnus partners with 60+ ISO 9001:2015 certified Indian foundries specialising in investment casting. We've shipped over 8 million precision-cast components to global OEMs in automotive, aerospace, medical, and industrial machinery — from 10-gram surgical instrument parts to 50-kilogram pump bodies.
For complex shapes that would require multiple machining setups, investment casting delivers near-net-shape parts with 60-80% less machining. That translates to lower labour costs, faster lead times, and material savings that compound across your annual run.
What our investment casting supplier network can produce — at scale, to international quality standards.
| Parameter | Specification |
|---|---|
| Casting weight range | 10 grams to 50 kilograms (single piece) |
| Dimensional tolerance | ±0.1mm per 25mm length (ISO 8062-DCTG 5 grade) |
| Surface finish (as-cast) | 1.6–3.2 μm Ra (smoother than sand casting) |
| Minimum wall thickness | 1.5mm (down to 0.6mm for select alloys) |
| Materials supported | SS 304SS 316SS 410SS 17-4 PHCarbon SteelAlloy SteelTool SteelAluminum AlloysCopper AlloysCobalt-Chrome |
| Annual production capacity | 100 units (prototype) to 1,000,000+ units (mass production) |
| Secondary operations | CNC machining, heat treatment, surface finishing, plating, assembly |
| Quality standards | ISO 9001:2015, IATF 16949, AS 9100D (aerospace suppliers), ISO 13485 (medical suppliers) |
| Testing & inspection | CMM dimensional, X-ray, dye penetrant, magnetic particle, ultrasonic, spectrometer, hardness |
| Surface treatments | Passivation, electropolishing, powder coating, e-coating, painting, plating |
Industries and component types where Magnus ships investment-cast parts every week. If your application isn't listed here, we likely still have a supplier for it — ask us.
Engine, transmission, and suspension components for global Tier-1 OEMs.
ISO 13485 medical-grade investment castings for instruments and implants.
Pump bodies, valve components, and precision sub-assemblies.
AS 9100D certified suppliers for non-critical aerospace components.
Turbine, generator, and oil & gas precision components.
Food-grade stainless steel castings with sanitary surface finish.
An overview of how investment castings are produced at our partner foundries. Each step is monitored and documented for traceability.
Aluminum or steel die designed and CNC-machined to produce wax patterns.
Wax injected into die, assembled into a tree along a central runner.
Wax tree dipped repeatedly in ceramic slurry to build a hard shell.
Shell heated to melt out wax, then fired to 950°C for strength.
Molten metal poured into shell. Cooled, shell broken, parts cut from tree.
Grinding, heat treatment, machining, inspection, packaging, shipment.
If your specs need certified material with mill test certificates, we have the supplier. Material traceability is documented from raw bar to finished part.
Every investment casting shipment goes through Magnus's independent QC at four checkpoints — pre-production, in-process, pre-shipment, and post-shipment audit.
Tooling FAI (First Article Inspection), pattern verification, ceramic shell process sign-off, material certification review.
Real-time monitoring of pour temperature, cooling rates, dimensional checks at 25/50/75% production milestones.
AQL-based final inspection per ISO 2859-1: CMM dimensional, surface finish, X-ray for critical parts, packaging verification.
Documentation pack: CoC, mill certificates, dimensional reports, NDT certificates, traceability records, all delivered before container leaves port.
A €600M German automotive supplier replaced their China-based investment casting source for 50,000 transmission housings per year with a Magnus-vetted Indian foundry. Magnus managed tooling transfer, 6-month parallel production, and supplier qualification across two production lines.
Most investment castings benefit from secondary operations. Magnus coordinates all of these in a single PO.
Share your drawings and target volume. We'll match you with 3-5 vetted foundries, factory-direct pricing, and sample timeline — at no cost, no obligation.