Comparing precision casting foundries, CNC machining capabilities and sourcing options for industrial OEM components.
Choosing an investment casting manufacturer is rarely as simple as finding a factory that can produce the required metal shape.
For a pump housing, valve component or agricultural machinery part, the casting is often only the beginning.
Critical surfaces still require machining, material properties must be verified, and the finished component needs to meet assembly requirements.
This is why experienced industrial buyers often evaluate the complete manufacturing route rather than comparing raw casting prices alone.
China has developed a substantial investment casting supply base, with manufacturers specializing in stainless steel, carbon steel, alloy steel and other engineering materials.
Some foundries focus on high-volume precision castings.
Others offer additional processes such as forging, sand casting, CNC machining and heat treatment.
This guide introduces 10 Chinese investment casting manufacturers and suppliers worth evaluating in 2026.
Selection note: Companies were selected for their publicly documented casting activities, relevant product portfolios and industrial applications.
This is not an independently audited ranking of production capacity, quality or financial performance.
Technical capabilities and certification validity should be confirmed directly before placing an order.
1. TIANHUI MACHINE — Investment Casting, CNC Machining and Integrated OEM Manufacturing
Location: Ningbo, Zhejiang / Chizhou, Anhui
Website: www.thcastings.com
Best suited for: Industrial OEMs requiring finished machined castings and coordinated manufacturing processes.
TIANHUI MACHINE, established in 2008, manufactures customized metal components for international industrial customers.
Unlike a foundry focused only on producing raw castings, Tianhui approaches manufacturing from the finished part requirements.
Its production activities span investment casting, sand casting, forging, CNC machining and secondary processing.
The company operates manufacturing bases in Ningbo and Chizhou, with its published capabilities covering precision casting, machining and quality inspection.
Investment Casting and Manufacturing Capabilities
Tianhui's published investment casting process uses silica-sol ceramic shells for steel and stainless steel components.
Reference capabilities include:
• Investment casting in stainless steel, carbon steel and selected alloy steels
• Current published casting weight range: 0.05–60 kg
• Reference minimum wall thickness: approximately 3 mm
• CNC turning and milling for critical dimensions
• Heat treatment and surface finishing according to project requirements
• material verification, dimensional inspection and agreed quality documentation
All casting limits are subject to drawing, alloy and process feasibility review.
Typical Components
Tianhui serves pump and valve manufacturers, hydraulic equipment producers, agricultural machinery OEMs and other industrial customers.
Representative components include pump parts, valve components, precision stainless steel castings and machinery components requiring both casting and machining.
Practical Manufacturing Example
One published Tianhui project involved a 316L stainless steel hydraulic metering diaphragm pump head.
The manufacturing route combined silica-sol investment casting with precision machining and air-tightness testing.
Reported project results included CT7 casting tolerance, selected machined dimensions to IT7 and surface roughness down to Ra 0.8 on specified machined features.
These results illustrate why a finished component should be evaluated through both casting and machining requirements, rather than treating casting tolerance as the final dimensional requirement.
Supplier Assessment
Tianhui is a relevant choice when a project involves multiple processes or when the buyer needs help evaluating different manufacturing methods.
Its approach is particularly useful for components with complex external geometry but a limited number of precision-machined functional surfaces.
For sourcing teams, the main advantage to investigate is whether coordinated casting, machining and inspection can reduce purchasing handoffs while maintaining the required technical standards.
Explore: Tianhui Investment Casting
2. Ningbo Qianhao Metal Products — Multi-Process Industrial Casting Manufacturer
Location: Ningbo, Zhejiang
Website: www.qianhao.com
Best suited for: OEMs requiring custom castings, forgings and machined structural components.
Ningbo Qianhao Metal Products Co., Ltd. is an established Chinese manufacturer of cast and machined metal components.
Its public manufacturing information covers lost-wax investment casting, sand casting, shell molding, forging and precision machining.
The company serves sectors including automotive, rail transportation, construction machinery, material handling and agricultural equipment.
Main Capabilities
Qianhao manufactures precision castings and supports other forming and machining processes for custom industrial parts.
Its broader manufacturing scope can be useful for buyers considering alternative production methods.
Supplier Assessment
Qianhao is worth evaluating when a project includes more than one category of manufactured metal component.
Buyers should discuss process selection, machining responsibility and how dimensional consistency will be maintained between sample approval and repeat production.
3. Ningbo Investment Casting Co., Ltd. — Established Lost-Wax Casting Foundry
Location: Ningbo, Zhejiang
Website: www.nbinvestmentcasting.com
Best suited for: Steel investment castings, industrial machinery and export-oriented OEM programs.
Ningbo Investment Casting Co., Ltd. reports that it was founded in 1983.
The company focuses on lost-wax investment casting, silica-sol casting and associated machining services.
Its published material range includes carbon steels, alloy steels, stainless steels and other engineering materials.
Main Capabilities
The company operates casting and machining facilities supporting custom metal components.
It also presents services relating to tooling, heat treatment, machining and surface finishing.
Supplier Assessment
Ningbo Investment Casting is relevant for buyers looking for a foundry with an established investment casting background.
For complex components, purchasers should confirm the applicable casting process, machining scope and inspection criteria for each specific drawing.
4. CFS Foundry — Investment casting and CNC machining Services
Location: Ningbo, Zhejiang
Website: www.investmentcastchina.com
Best suited for: Stainless steel castings, general industrial components and custom manufacturing.
CFS Foundry is a Ningbo-based metal casting and CNC machining supplier.
Its public portfolio covers investment casting, die casting and machining services.
The company supplies cast components in stainless steel, carbon steel, alloy steel and other materials for industrial applications.
Main Capabilities
CFS offers custom casting production supported by secondary CNC machining and finishing operations.
Its published application areas include automotive, marine, agricultural and valve-related components.
Supplier Assessment
CFS is worth considering for purchasers who need conventional investment casting processes combined with machining.
When comparing quotations, confirm whether CNC machining, heat treatment and final inspection are included in the price or quoted separately.
5. JC Casting — Custom Casting and Finished Metal Components
Location: Dongying, Shandong
Website: www.jccasting.com
Best suited for: Drawing-based investment castings and general OEM component manufacturing.
JC Casting specializes in custom casting and machining services.
According to its published company information, it operates foundry and machining resources for producing finished metal parts.
Main Capabilities
The company's portfolio includes investment casting, sand casting, die casting, CNC machining and finishing services.
Its listed material options include stainless steel, carbon steel, alloy steel and selected non-ferrous materials.
JC Casting serves industrial machinery, pump and valve, agricultural equipment and other application markets.
Supplier Assessment
JC Casting may be a useful candidate when the customer's priority is obtaining an inspected finished component rather than purchasing raw castings alone.
For machined castings, buyers should require clear control of casting datums, machining allowance and the sequence of inspection operations.
6. Dongying Changrui Investment Casting — Precision Castings for Diverse Industries
Location: Dongying, Shandong
Website: www.investment-casting-changrui.com
Best suited for: Industrial, automotive, agricultural and pump or valve castings.
Dongying Changrui Investment Casting Co., Ltd. reports that it was founded in 2004.
Its manufacturing portfolio covers investment casting, heat treatment, machining and surface treatment.
The company supplies cast components for industries including automotive equipment, agricultural machinery, food processing, pumps and valves.
Main Capabilities
Changrui lists precision casting services for carbon steel, stainless steel, alloy steel and additional engineering materials.
Its company profile also describes formal quality management and industrial production systems.
Supplier Assessment
Changrui is relevant for buyers seeking a specialist investment casting manufacturer with supporting secondary operations.
For automotive or other controlled manufacturing programs, request current quality certificates and confirm their precise scope before qualification.
7. Dongying Hengke Precision Metal — Stainless Steel and Valve Casting Specialist
Location: Dongying, Shandong
Website: www.hengkecasting.com
Best suited for: Valve bodies, industrial fluid handling components and stainless steel precision castings.
Dongying Hengke Precision Metal Co., Ltd. specializes in investment casting for industrial components.
Its published portfolio includes stainless steel and carbon steel products used in pump, valve and related equipment applications.
Main Capabilities
Hengke provides precision casting and machining support, with published information concerning pressure-equipment and marine-related material requirements.
Supplier Assessment
Hengke is a relevant company to evaluate for valve and fluid-handling components where casting integrity and material verification are particularly important.
For pressure-containing parts, buyers should specify the governing material and inspection standards, testing pressure if applicable, and the documentation required by the destination market.
Published certification claims are not a substitute for checking current certificate validity, scope and approval status.
8. Besser Casting — Custom Investment Casting and Secondary Processing
Location: Ningbo, Zhejiang
Website: www.bessercasting.com
Best suited for: custom metal parts, precision castings and industrial manufacturing programs.
Besser Casting specializes in investment casting and associated processing services.
Its public portfolio includes stainless steel, carbon steel, alloy steel and selected specialty alloy casting.
The company also describes machining, finishing and quality control activities.
Main Capabilities
Besser offers investment casting development from tooling through production, including secondary processing and inspection.
Its products serve sectors including automotive, construction machinery, agricultural equipment and industrial applications.
Supplier Assessment
Besser may be a suitable candidate for buyers with established technical drawings and defined casting requirements.
For new products, it is useful to review tooling development, trial casting acceptance criteria and whether sample approval covers both raw castings and finished machined parts.
9. Taiyuan SIMIS Investment Casting — Casting and Forging Manufacturing Solutions
Location: Taiyuan, Shanxi
Website: www.simis-group.com
Best suited for: Industrial buyers needing a range of casting and forging processes.
Taiyuan SIMIS Investment Casting Co., Ltd. is part of a manufacturing group offering casting and forging services.
Its published production activities include investment casting, sand casting, forging and CNC machining.
Applications span industrial equipment, automotive-related parts, construction machinery and additional engineered components.
Main Capabilities
SIMIS presents a broad manufacturing portfolio rather than limiting its services to a single lost-wax casting process.
This allows buyers to consider different production routes for components that may not be economical or technically suitable for investment casting.
Supplier Assessment
SIMIS is worth evaluating for projects involving different component geometries, part weights and manufacturing processes.
Buyers should identify the specific facility and process that will produce their parts, especially when several foundries or workshops are involved.
10. Ningbo Zhiye Mechanical Components — Precision Steel Casting and Related Processes
Location: Ningbo, Zhejiang
Website: zhiye-casting.com
Best suited for: Automotive, agricultural, food machinery and custom steel casting components.
Ningbo Zhiye Mechanical Components Co., Ltd. is a precision casting manufacturer associated with a wider manufacturing group.
Its published capabilities include silica-sol casting, lost-foam casting, water-glass casting and shell-mold casting.
Main Capabilities
The company produces steel casting components for various industrial sectors, including automotive systems, food machinery and agricultural equipment.
Supplier Assessment
Zhiye may be a useful candidate when a project requires comparison between different steel casting methods.
For buyers, it is important to determine which casting route will be used for their component, since surface finish, dimensional capability, tooling economics and production limits can vary substantially.
Comparison of 10 Investment Casting Manufacturers in China
Manufacturer | Relevant manufacturing focus
TIANHUI MACHINE | Investment casting, CNC machining and coordinated OEM manufacturing
Ningbo Qianhao | Precision castings and multiple forming processes
Ningbo Investment Casting | Established lost-wax casting and machining
CFS Foundry | Investment casting and CNC machining
JC Casting | Custom castings and finished metal components
Dongying Changrui | Investment casting, heat treatment and machining
Dongying Hengke | Stainless steel and valve-related castings
Besser Casting | Precision castings and secondary processing
Taiyuan SIMIS | Casting, forging and CNC manufacturing
Ningbo Zhiye | Silica-sol and other steel casting methods
The appropriate shortlist depends on material, geometry, order volume, inspection scope and whether the buyer needs raw castings or finished parts.
What Makes a Good Investment Casting Manufacturer?
The following considerations can help OEM purchasing teams distinguish between a company with an attractive catalog and a manufacturing partner capable of controlling repeat production.
1. Manufacturing Process Selection
Investment casting is particularly useful for complex geometries where near-net-shape production can reduce material removal and simplify downstream manufacturing.
However, it is not automatically the most economical option.
For larger or less complex parts, sand casting may be more appropriate.
For certain strength-critical geometries, forging may provide advantages.
For simple low-volume parts, machining from stock may eliminate tooling costs.
A capable manufacturing partner should be willing to compare processes instead of forcing every drawing into investment casting.
2. Material Knowledge
Common investment casting materials include stainless steel, carbon steel, alloy steel and selected specialty alloys.
Selecting a material by name alone is not sufficient.
Buyers should provide the required material specification and, when relevant, mechanical properties, heat treatment condition, corrosion requirements and operating temperature.
Equivalent alloy designations should be confirmed rather than assumed.
3. Control of Casting Defects
Potential investment casting issues include shrinkage porosity, inclusions, misruns, distortion and surface defects.
The risk depends on the material, geometry, wall transitions, gating and feeding arrangements, shell process and production conditions.
For critical parts, review how the manufacturer plans to control these risks and what acceptance criteria apply.
4. CNC Machining Capabilities
Many investment castings still require CNC machining.
For example, a pump component may need machined sealing surfaces, coaxial bores, accurate mounting faces or threaded connections.
If machining allowance or datums are poorly planned during casting development, the final part can become difficult or expensive to manufacture.
It is therefore useful to discuss the complete route before investing in tooling.
5. Quality Control and Traceability
Depending on the component and application, buyers may request:
• Material composition reports
• First Article Inspection (FAI)
• Coordinate Measuring Machine (CMM) reports
• Hardness or mechanical property testing
• non-destructive testing, where required
• Surface roughness inspection
• Pressure or leakage testing for applicable components
• PPAP documentation for relevant automotive projects
Testing methods, sample sizes and acceptance criteria should be defined in the purchase specification.
Investment Casting vs. CNC Machining: Which Is More Cost-Effective?
Consider a complex stainless steel component with several curved surfaces and two precision bores.
Producing the entire part from solid stock may require substantial machining time and material removal.
Investment casting can create much of the external geometry closer to its final form, while CNC machining is reserved for functional features.
However, investment casting introduces tooling costs, casting development and process controls.
The economic comparison should include:
Total part cost = tooling allocation + raw casting cost + machining cost + secondary processing + inspection + logistics.
A low raw casting quotation does not necessarily produce the lowest total finished-part cost.
For repeat OEM orders, process optimization may create greater savings than simply negotiating a lower unit price.
Questions to Ask Before Selecting a Chinese Investment Casting Supplier
Before approving a new supplier, consider these questions:
1. Can the manufacturer review the drawing and recommend an appropriate process?
2. Which casting operations and machining operations are performed at the stated facility?
3. What is the practical casting weight and size range for the specified alloy?
4. How are critical dimensions and machining datums controlled?
5. Who owns the tooling, and how are tooling changes managed?
6. What inspection reports will accompany the samples and production batches?
7. How will the manufacturer handle nonconforming castings?
8. Can the approved process be maintained for repeat orders?
These questions help reveal whether a supplier can manage the project beyond the initial sample stage.
Frequently Asked Questions
What is the difference between investment casting and lost-wax casting?
The terms are commonly used for the same basic process, in which a disposable pattern is surrounded by a refractory mold before metal is poured into the cavity.
Is silica-sol investment casting better than water-glass casting?
Not in every application.
Silica-sol processing is commonly selected when finer surface finish and dimensional control are important.
Water-glass processes may offer economic advantages for suitable components.
The final choice depends on material, geometry and specifications.
Can investment castings be supplied fully machined?
Yes.
Many manufacturers offer casting followed by CNC machining, heat treatment, finishing and inspection.
Buyers should confirm the exact scope in the quotation.
How do I reduce the cost of custom investment castings?
Start by reviewing the drawing.
Avoid unnecessary as-cast precision, use machining only for functional features, consider wall transitions and combine features where practical.
The best savings often come from improving the manufacturing route rather than lowering inspection standards.
Final Thoughts
China offers many capable investment casting suppliers, but their strengths vary by material, part geometry, processing scope and industry.
For simple casting requirements, a specialist foundry may be sufficient.
For industrial OEM components involving casting, machining, heat treatment and dimensional verification, the ability to coordinate the complete manufacturing route becomes more important.
TIANHUI MACHINE supports drawing-based investment casting and CNC-machined component development for pump and valve equipment, hydraulic machinery, agricultural machinery and other industrial applications.
If you are evaluating a new casting supplier or considering a different manufacturing process, start by sharing the finished-part drawing, material requirements and estimated production volume.
Explore Investment Casting Capabilities | View Manufacturing Case Studies | Request a Manufacturing Review
