What quality certifications does Bohua Cast hold?

Bohua Cast operates under IATF 16949:2016 and ISO 9001:2015 quality management certifications. The IATF certificate scope covers manufacturing of aluminum alloy cast parts and is issued by NQA, valid through 20 November 2027.

What aluminum alloys does Bohua Cast work with?

Bohua Cast works with a range of common aluminum casting alloys spanning gravity, low-pressure, and high-pressure die casting routes, selected based on part function, mechanical requirements, and heat-treatment compatibility. Alloy selection is discussed with the buyer during RFQ review to align with end-use performance and downstream operations.

What is the typical lead time for custom aluminum gravity die castings from Bohua Cast?

Bohua Cast's tooling-to-first-sample lead time depends on part geometry, mold design complexity, and casting validation scope—covering mold design, mold fabrication, trial casting, and initial dimensional reporting. Engineering review and preliminary quotation are provided after receiving drawings and specifications. Production lead times for serial runs depend on part complexity, annual volume, and processing scope.

What industries and applications does Bohua Cast serve?

Bohua Cast serves four primary industries: (1) Automotive — engine components, transmission housings, and structural brackets for automotive supply chains; (2) Industrial and Petrochemical — pump housings, valve bodies, gearbox housings, and impellers for fluid and mechanical systems; (3) Rail and Transportation — structural aluminum components for rail and transportation programs; (4) Consumer Appliances — precision castings for appliance manufacturers. Part sizes are program-dependent, with maximum dimensions up to 1,200 mm.

What quality control processes does Bohua Cast use during production?

Bohua Cast quality control can include melt chemistry verification with an Oxford Foundry Master Pro OES, dimensional checks with a Hexagon Global S 7.10.7 CMM, 3D scanning, tensile or universal testing, X-ray inspection, helium leak testing, and AIAG PPAP records when the buyer defines that approval scope.

How does gravity die casting differ from high-pressure die casting (HPDC)?

Gravity die casting fills the permanent metal mold using gravitational force without external pressurized injection. This results in 40–60% lower porosity than high-volume die casting for thick-wall components above 8mm, because the slower fill rate reduces gas entrapment. The trade-off is a slower cycle time (typically 2–5 minutes vs. 30–90 seconds for high-volume die casting). Gravity die casting is preferred for pump housings, valve bodies, hydraulic manifolds, and other structural fluid-handling components where dimensional integrity and casting soundness are important. High-volume die casting is better suited for thin-wall, high-volume cosmetic parts.

What dimensional tolerances does Bohua Cast achieve on gravity die cast parts?

As-cast dimensional tolerances at Bohua Cast follow ISO 8062 CT6–CT7 for aluminum gravity die castings, which corresponds to ±0.2–0.5mm depending on feature size and wall thickness. For critical bore diameters and mating surfaces, post-cast secondary operations achieve tolerances of ±0.02–0.05mm (IT7–IT8). Surface finish in the as-cast condition is typically Ra 3.2–6.3μm; finished surfaces achieve Ra 0.8–1.6μm. Flatness and perpendicularity GD&T callouts are held per customer drawings with full dimensional reporting provided in the part qualification package.

What surface treatments and secondary operations does Bohua offer?

Bohua Cast offers a range of secondary operations in-house and through qualified local subcontractors. In-house operations include CNC finishing operations (3-axis and 4-axis), shot blasting, and sealing validation testing. Surface treatment options available through our supply chain include anodizing (clear, hard, and color), powder coating, chemical conversion coating (Alodine/Chromate, RoHS-compliant trivalent chrome), and e-coating. For zinc alloy castings, electroplating (nickel, chrome) is available. All surface treatment subcontractors are audited under Bohua's quality-managed supplier management program.

What is the maximum part size and weight Bohua Cast can produce?

Bohua Cast's gravity die casting capability covers parts from 50 grams up to approximately 30 kilograms. Maximum envelope dimensions for a single casting are approximately 600mm × 500mm × 400mm (L×W×H). For larger assemblies requiring multiple cast components that are subsequently machined and assembled, Bohua can manage the complete supply of a multi-component system. Minimum wall thickness achievable in aluminum gravity casting is 3.0–3.5mm for standard geometries, or 2.5mm for short-run features with optimized gating design.

What batch sizes does Bohua Cast typically run, and is low-volume production supported?

Bohua reviews batch size, MOQ, and release cadence from the drawing, tooling route, machining load, inspection package, and annual forecast. Prototype, pilot, and serial supply assumptions should be stated in the RFQ so tooling, sample approval, and production planning can be reviewed before quotation.

Home/Capabilities

What We Do

Casting Capabilities

Four aluminum casting processes. One quality system. Parts from 0.1 kg to 50 kg, with dimensions exceeding 1,200 mm.

A356ZL114ZL101ADC12

All processes · IATF 16949 quality system

Quick answer for buyers

Bohua supports four casting routes — gravity, die, low-pressure, and sand — with CNC machining coordination, inspection planning, and export-ready delivery from Ningbo. Buyers should send drawings, alloy target, annual volume, and machining scope to get a process-route recommendation and manufacturing quote.

Buyer facts

Location	Ningbo, Zhejiang, China
Process fit	Gravity casting for structural, pressure-conscious parts needing T6 and low porosity; die casting for high-volume thin-wall programs; low-pressure for structural housings with consistent fill needs; sand casting for complex or lower-volume geometries
Weight range	0.5 – 50 kg across all processes; gravity and sand casting up to approximately 1,200 mm in the largest dimension
Quality evidence	IATF 16949:2016 certified (NQA); Hexagon Global S 7.10.7 CMM, Oxford Foundry Master Pro OES, 3D scanner, X-ray, tensile / universal testing machine, helium leak testing, and AIAG PPAP workflow
Export execution	Typical Incoterm: FOB Ningbo or CIF destination; parts packed per program — VCI film, foam dunnage, pallet, or carton depending on Incoterm, destination port, and inbound-quality requirements
RFQ inputs	2D drawing + 3D model (STEP), alloy target or mechanical requirement, annual volume, machining scope, inspection package, and surface treatment needs

Automated Gravity Casting

Our core process. Automated gravity casting with production data tracking supports dense aluminum parts with strong metallurgical integrity and scalable repeatability.

Specs

AlloysA356, ZL114, ZL101

Weight range0.5 – 20 kg

Max dimension> 1,200 mm (proven: 1.2m × 0.5m intake manifold)

Typical Applications

· Structural automotive parts
· Truck intake manifolds
· Valve bodies
· Pump housings
· Fire engine parts
· Petroleum pipeline fittings

Advantages

✓ Superior mechanical properties — T6 heat treatable
✓ Parts up to 1.2 meters — few foundries can match
✓ Automated production lines with production data tracking
✓ Lower tooling cost for medium volumes
✓ Reduced porosity — dense, strong castings

Aluminum Die Casting

High-pressure die casting supports complex geometries with strong productivity, consistent dimensions, and competitive piece cost for higher-volume programs.

Specs

AlloysA380, ADC12

Weight range0.05 – 15 kg

Max dimension> 800 mm

Typical Applications

· Automotive components
· Electronics housings
· Blower machine parts
· Appliance components

Advantages

✓ High production speed for large volumes
✓ Excellent dimensional accuracy and repeatability
✓ Thin walls achievable (1.5mm+)
✓ Near-net-shape — minimal machining required

Low-Pressure Casting

Low-pressure casting uses controlled positive pressure to improve filling stability, density, and internal quality for demanding structural and leak-sensitive parts.

Specs

AlloysA356, ZL114

Weight range1 – 15 kg

Max dimension700 mm

Typical Applications

· Automotive wheels
· Suspension components
· Cylinder heads
· Structural housings

Advantages

✓ Best mechanical properties among casting methods
✓ Excellent surface finish
✓ Controlled fill — reduced oxide inclusions
✓ Suitable for safety-critical components

Sand Casting

Sand casting gives buyers flexibility for large, complex, or lower-volume parts where tooling economy and geometry freedom matter more than cycle speed.

Specs

AlloysA356, ZL101, Custom alloys

Weight range1 – 50 kg

Max dimension> 1,200 mm (proven: 1.2m × 0.5m intake manifold)

Typical Applications

· Large intake manifolds
· Custom prototypes
· Low-volume specialty parts
· Complex internal geometries

Advantages

✓ Low tooling cost for prototypes
✓ Flexible for design changes
✓ Large-part capability
✓ Complex internal channels possible

Inspection equipment

Hexagon Global S 7.10.7 CMM, Oxford Foundry Master Pro OES, 3D scanner, X-ray inspection, Helium leak testing, Tensile / universal testing machine, AIAG PPAP workflow

Machining capability

In-house CNC machining centers for critical datums, sealing faces, and production fixtures.

Heat treatment

T5 and T6 routes available for suitable alloys and validated part programs.

Program support

Suitable for OEM, automotive, industrial, and export-oriented aluminum casting projects.

Capability snapshot

Facility13,420 sqm

Employees85

Annual capacity2,500 tons

Core certificationsIATF 16949, ISO 9001:2015

Core equipmentAutomated gravity casting lines, Low-pressure casting cells, High-pressure die casting machines, CNC machining centers

Industry Coverage

OEM Supply Segments

We supply precision aluminum castings into automotive, electric vehicle, rail, industrial equipment, and appliance-related supply chains worldwide. Customer references can be discussed under NDA during qualified RFQ review.

Automotive Supply Chain

Engine, transmission, structural

EV Drivetrain

Motor housings, end bells, e-drive

Rail transit

Structural aluminum components

Industrial Equipment

Pump, valve, gearbox housings

Appliance OEM

Precision castings, brackets

Production Data

Production Monitoring and Quality Tracking

Production monitoring and scheduling workflows help teams review casting-cycle data, inspection signals, and corrective actions.

▦

Production Scheduling

Daily production plans coordinate casting sequences, resource allocation, and throughput review.

📡

PLC Real-Time Monitoring

Automated gravity casting lines with PLC-integrated furnace temperature monitoring and instant anomaly alerts.

🔒

Local Data Handling

Project and production data workflows are designed around Bohua-controlled systems and buyer confidentiality.

📊

Yield and Quality Tracking

Production teams monitor yield, inspection, and anomaly trends to support corrective action and process stability.

Capabilities FAQ

What measurement and verification equipment do you have?

Bohua uses a Hexagon Global S 7.10.7 CMM, Oxford Foundry Master Pro OES, 3D scanner, X-ray inspection, tensile / universal testing machine, and helium leak testing to verify dimensions, chemistry, internal quality, mechanical properties, and pressure-sensitive features when required by the RFQ.

Can you support automotive quality system and documentation requirements?

Yes. Bohua operates under IATF 16949:2016 and ISO 9001:2015 quality systems and can support AIAG PPAP workflow, control plans, dimensional reporting, material records, and serial-production discipline depending on project scope.

What is your quality control process?

Our quality workflow starts from incoming material and melt verification, continues through process control during casting and secondary operations, and ends with dimensional, visual, and application-specific quality review before shipment.

Do you have in-house secondary operations capability?

Yes. Bohua has in-house CNC finishing centers to complete critical datums, sealing faces, holes, and other precision features after casting.

What is your heat treatment capability?

We support heat-treatment routes such as T5 and T6 for suitable gravity-cast and low-pressure-cast aluminum alloys, depending on the part requirement and validation target.

Can you handle low-volume orders?

Yes. For prototypes, bridge quantities, or specialized geometries, Bohua can support lower-volume work through sand casting, selected gravity casting setups, and development runs with finishing operations.

Not sure which process fits your part?

Share your drawing, alloy target, volume, machining scope, and inspection needs so the team can review process fit.

Talk to an Engineer