Ladle pouring molten aluminum into a resin-sand mold

Ningbo, China · IATF 16949 (NQA)

Aluminum Gravity Casting Built for Global OEMs

Gravity and tilt-pour casting in Ningbo, China. A manufacturer with its own factory and export team. Casting experience since 1994.

Send your drawing →Watch the factory film 1:39

Filmed at our plant in Ningbo

We are the factory, with our own export team. About 70% of our sales are exported.

Casting aluminum since: 1994
Tilt-pour casting machines: 32
Annual parts shipped: 3–4 million
Quality system, certified by NQA: IATF 16949

Start with your part

Find the right aluminum casting for your project.

Explore pump housings, valve bodies, machined enclosures, and A356 castings.

Review the relevant process and inspection options, then share your drawings and requirements with our team.

Painted aluminum pump housing cast at Bohua

Aluminum pump housingsReview pump housings with machined sealing faces, bores, and pressure-test requirements defined by your drawing.

Valve bodiesSpecify ports, threads, sealing surfaces, and inspection requirements for hydraulic and flow-control components.

A356 castingsCompare casting, heat-treatment, and machining options for A356 housings and structural components.

Aluminum pump casing for pressure-tight service

Pressure-tight castingsDefine the test method, pressure, and acceptance criteria for castings with sealing surfaces and internal fluid passages.

Gearbox housingsReview bearing seats, machining datums, heat-treatment requirements, and inspection for drive-system housings.

Motor housings and coversExplore aluminum motor housings, end bells, and end covers with drawing-defined casting and CNC machining requirements.

Discuss tooling, annual demand, drawing revisions, and documentation for a new or second-source casting program.

Discuss geometry, sample validation and acceptance requirements before agreeing project scope.

Tooling, material, geometry, inspection and delivery are reviewed for each drawing.

Review inspection capabilities and discuss material certificates, dimensional reports, and project-specific quality records.

For alloy selection, start with A356 specification and property evidence; for a new inquiry, use the drawing and inspection checklist.

Read about our factory.

Overhead view of a foundry hall with holding furnaces and green fume ducts

From tooling to machined castings. At our plant in Ningbo.

Our site of about 16,300 m² includes casting, core making, tooling, T5/T6 heat treatment, CNC machining and inspection.

How your project moves through Bohua

Nine stages, from your first inquiry to export delivery. Each one links to what you need to prepare and what Bohua can show you.

1. Share your requirementsSend project details and state any NDA requirement before emailing drawings to Linda. 2. Review the drawingIdentify the controlled revision, critical features and open manufacturing questions. 3. Select material and processMatch your drawing to the available casting routes and the required material condition. 4. Define the quotationOrders are quoted by annual volume; small batches are negotiable. 5. Plan tooling and first articleBohua designs and makes molds in-house, with 5–6 weeks from drawing confirmation to first article. 6. Check the first articleDefine the sample condition and required material, dimensional, internal-quality and functional checks. 7. Agree approval evidenceBohua supports PPAP up to Level 5 according to project requirements. 8. Define production operationsBohua performs casting, T5/T6 heat treatment, CNC machining and inspection at the same site. 9. Agree export deliveryDiscuss packaging, destination, delivery terms and required records with Bohua's own export team.

The 5–6 weeks cover drawing confirmation to first article, not sample approval, PPAP completion or production delivery.

Heat treatment and machining may also be needed before first-article inspection.

Explore the full project path and casting capabilities.

Start with the new-part RFQ checklist, the existing-tool transfer checklist or the small-batch casting guide.

Gravity and tilt-pour casting.

32 tilt-pour machines, some designed and built in-house. 10 vertical gravity casting machines.

Tilt-pour casting →

Explore gravity and permanent mold casting with A356 and ZL114.

Casting machine with enclosed furnace below

Low-pressure casting →

Low-pressure casting has been in-house since 2014.

Die casting →

Two machines: 280 t and 450 t.

Molten aluminum being poured into a sand mold

Sand casting →

Sand casting is done in-house.

CNC machining →

16 vertical machining centers and 22 CNC lathes.

Inspection at the same plant.

Bohua Casting operates under an NQA-certified IATF 16949 quality management system.

X-ray inspection cabinet — X-ray inspection

Optical emission spectrometer — Material analysis

Coordinate measuring machine on a granite table — Dimensional inspection

Benchtop hardness tester — Hardness testing

Universal tensile testing machine — Tensile testing

A356 / ZL114 gravity casting is supported with CNC machining, project-defined pressure-tightness testing, and drawing-based RFQ review.

ISO 9001 requirements are incorporated within the IATF 16949 system; Bohua does not currently hold a separate ISO 9001 certificate.

As-cast tolerance is CT8. Key dimensions after machining can reach ±0.02 mm. These are different stages of production.

PPAP is available up to Level 5. Air-under-water immersion testing is available at 3 bar or more. Impregnation is completed by a qualified subcontractor only with customer consent.

Review inspection capabilities →

Real castings. Ready for a closer look.

Parts made at Bohua. Customer logos and part numbers are masked.

View the parts gallery →

Have a similar part? Send your drawing

Send us your drawing.

You work directly with our factory and export team. Share your drawing, alloy and annual volume to start a project review.

Send your drawing →

Linda

Export Sales

linda@ningbobohua.com

Ningbo, Zhejiang, China