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Yancheng Longwan Machinery Co., Ltd. HOME / PRODUCTS & APPLICATION

Cast Iron Automotive Parts Manufacturers

  • Ductile Cast Iron

    Ductile Cast Iron

    Ductile Cast Iron is a high-strength cast iron material with comprehensive properties close to those of steel. Spheroidal graphite is formed through spheroidization and inoculation treatment, which si...
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  • Grey Cast Iron

    Grey Cast Iron

    Gray Cast Iron is known for its good casting properties and machinability. During the casting process, the liquid iron has good fluidity and the casting is not easy to crack; its good thermal conducti...
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  • Ductile iron Pipe Fittings

    Ductile iron Pipe Fittings

    Ductile iron pipe fittings are a type of high-strength, corrosion-resistant pipe fittings that are widely used in water treatment, fire protection, and water distribution systems. These pipe fittings ...
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ABOUT US
Yancheng Longwan Machinery Co., Ltd.
Yancheng Longwan Machinery Co., Ltd.
Founded in 2006, which located next to National Highway 204 in Yancheng City, Jiangsu Province, 40km from the center of Yancheng City, 5km from the center of Dongtai City, 30km from Dafeng District, and 10km from the exit of Baiju Expressway, with convenient transportation. We mainly produce various types of fire-fighting pipe fittings, reducer parts, auto parts, agricultural machinery, and industrial robot parts. Its main customers include SAIC Group, Deere, Bonfiglioli (China), Shanghai Beixu, Yaskawa Electric, etc. As a famous China Cast Iron Water Pump Parts Manufacturers and Cast Iron Valve & Valve Body Mechanical Parts Factory, our company has a variety of molding equipment, including one vertical sand-shot horizontal parting boxless shot-press molding line with specifications of 610*510*240, 120 boxes/hour, suitable for mass production of small parts; one upper and lower sand-shot horizontal parting boxless shot-press molding line with specifications of 750*650*250, 100 boxes/hour, suitable for mass production of small and medium-sized parts; 3 sets of 1.25T medium-frequency electric furnaces; 3 cleaning shot blasting machines, and now planning a lost foam production line, suitable for 100Kg~1000Kg casting production, and planning an automatic spray painting line and an electrophoretic coating line at the same time, 3 CNC lathes and 3 lathes.
Yancheng Longwan Machinery Co., Ltd.

ODM Customization Expert

Advanced Production & Processing Equipment

Longwan Machinery has a variety of advanced domestic and foreign molding equipment, including 2 fully automatic production lines for clay sand, 1 semi-automatic production line for clay sand, and 1 coated sand production line, with an annual production capacity of 15,000 tons.

Yancheng Longwan Machinery Co., Ltd.

Complete Inspection Flow

Strict Quality Inspection

We have full-process testing equipment: spectrum analyzer, metallographic microscope, universal tensile testing machine, magnetic particle flaw detector, ultrasonic flaw detector, etc.
The above equipment can fully ensure that we can provide customers with high-precision final castings, and at the same time ensure that we meet customers' comprehensive testing requirements for physical and chemical properties of materials, non-destructive testing, high-precision geometric dimension testing, etc.

Professional Casting Expert

Comprehensive Casting Manufacturer

FAQ
  • Q
    Where are your products mainly exported to?
    A

    Our products are mainly exported to multiple countries such as Germany, Japan, Italy, South Korea, and Australia.
  • Q
    How to deliver the goods to us?
    A

    Usually, we ship by sea, which is very convenient for export.

    Of course, if the customer's goods are urgent, we can also air freight them. Ningbo Airport and Shanghai International Airport are both very close to us.
  • Q
    What's the payment term?
    A

    When quoting, we will confirm the transaction method with you.

    For mass production, we usually make a 50% advance payment in advance and then inspect and confirm the shipment before paying the remaining balance.
  • Q
    How to guarantee the quality of your goods?
    A

    Firstly, there will be corresponding inspections after each process, and for the final completed product, we will conduct a full inspection according to customer requirements and international standards;

    Then, we have advanced and complete top testing equipment in the industry: spectral analyzers, metallographic microscopes, universal tensile testing machines, magnetic particle testing machines, ultrasonic testing machines, etc.

    The above equipment can fully ensure the provision of high-precision final castings to customers, while also meeting the comprehensive testing requirements of customers for material physical and chemical properties, non-destructive testing, high-precision geometric dimension testing, and so on.
  • Q
    How many employees of your company? what about the technicists?
    A

    Our company has more than 120 employees, including 10 professional technicians and 5 engineers.
  • Q
    How about the capacity of your company?
    A

    We have 2 fully automatic clay sand production lines, 1 semi-automatic clay sand production line, and 1 coated sand production line, with an annual production capacity of 15000 tons.
  • Q
    Do you have some standard parts?
    A

    No, currently we produce and customize according to the requirements based on the drawings provided by the customer.
  • Q
    Can you do customized products?
    A

    Yes, we are mainly doing customized products according to the customers’ drawings or samples.
  • Q
    What applications do your products relate to?
    A

    Our products cover almost all the applicable equipment manufacturing and machinery manufacturing and processing fields, mainly including automotive trucks, engineering machinery, agricultural machinery, reducers, water pumps, water treatment systems, and other fields.
  • Q
    what products can you offer?
    A

    We mainly produce cast iron parts made of gray cast iron and ductile iron materials.
  • Q
    Are you a direct manufacturer or trading company?
    A

    We are a foundry and a manufacturer of cast iron parts.
  • Q
    How long can I get the feedbacks after we sent the inquiry?
    A

    We will reply to you within 24 hours of the working day.
NEWS
PRODUCTS & APPLICATION Industry knowledge

Yancheng Longwan Machinery Co., Ltd. is a Cast Iron Automotive Parts manufacturer operating our own foundry in Yancheng, Jiangsu Province, where we have poured ductile and grey iron castings since 2006. Automotive work runs through our order book: caliper bodies, caliper brackets, suspension support arms, bearing housings, differential carriers, pump and valve bodies, and housings and covers supplied as castings or as fully machined parts. Every program is built from a customer drawing or sample, so tooling, grade and machining scope are fixed before the first heat is poured.

  • Two automatic clay sand lines, one semi-automatic clay sand line and one coated sand line, with a 15,000 ton annual casting capacity
  • Melting on three 1.25 T medium-frequency electric furnaces with spheroidization and inoculation control for ductile grades
  • 33,000 m² site with 21,300 m² of buildings; more than 120 employees including 10 technicians and 5 engineers
  • IATF 16949:2016 system standard with in-house chemical, mechanical, metallographic, sand and non-destructive testing
  • Machining on three CNC lathes and three lathes; three cleaning shot blasting machines

Our Cast Iron Automotive Parts Range

As a Cast Iron Automotive Parts manufacturer, we match product configuration to the application, operating limits, interfaces and acceptance criteria defined for each project.

The range divides by material family rather than by vehicle system, because the graphite form decides which loads a part can carry. We cast both families on the same melting and molding platform and machine the interfaces that the assembly line locates on.

Material / range Typical automotive components Selection driver Production route
Ductile cast iron (nodular) Brake calipers and caliper brackets, steering knuckles, support arms, differential carriers, axle and pump housings Tensile strength with usable elongation; impact and fatigue resistance on dynamic joints Boxless molding lines, coated sand cores, controlled magnesium treatment, heat verification on test bars
Grey cast iron Engine blocks and liners, exhaust manifolds, transmission and clutch housings, gearbox and timing covers, brake discs and drums Vibration damping, thermal conductivity, machinability and compressive strength High-volume automated clay sand molding, core assembly, shot blasting, machining where required
Ductile iron pipe fittings Fire-fighting pipe fittings, water distribution and water treatment fittings Pressure tightness, impact resistance and long-term corrosion performance Casting, finishing and pressure-related inspection to the agreed acceptance plan
Machined castings Cylinder blocks, flanges, bores, seal faces, threaded ports on housings and bodies Tolerance-critical mounting and sealing interfaces Three CNC lathes and three lathes; as-cast plus machining in one flow
Other cast accessories Brackets, flanges, counterweights, reducer and robot parts sharing the same material families Drawing-specific structural or wear duty Configured per drawing and production volume

Ductile Cast Iron Automotive Parts

Nodular graphite is formed through magnesium treatment and inoculation, which lifts tensile strength and elongation above grey iron and lets a loaded component deform instead of shattering. Automotive programs usually specify grades in the EN-GJS-400-15 to EN-GJS-600-3 band; we confirm the grade from the drawing and validate chemistry, tensile properties and hardness on cast test bars. See the dedicated Ductile Cast Iron Automotive Parts range for the caliper, bracket and support-arm castings we run most often.

  • Brake calipers, caliper brackets and anchor plates
  • Steering knuckles, suspension support arms and control-arm bodies
  • Differential carriers, bearing caps and axle housings
  • Pump and valve bodies for engine ancillaries and cooling circuits

Grey Cast Iron Automotive Parts

Flake graphite gives grey iron its damping capacity and thermal conductivity, which is why housings, covers and manifolds stay in this material even where a stronger alternative exists. The liquid iron flows well in thin sections, so complex internal passages cast cleanly, and the free-machining behaviour keeps secondary operations short. Our Grey Cast Iron Automotive Parts are cast on the automated lines for stable wall thickness and repeatable structure.

  • Cylinder blocks, liners and crankcase-related castings
  • Transmission, clutch and gearbox housings and covers
  • Exhaust manifolds and turbo mounting castings
  • Brake discs and drums, pump housings and bearing supports

Ductile Iron Pipe Fittings and Adjacent Castings

The same ductile metallurgy supports our fire-fighting and water-side work. Ductile iron Pipe Fittings are supplied for water treatment, fire protection and water distribution systems, where pressure tightness and impact resistance matter more than weight saving. Vehicle manufacturers ordering road-going castings frequently source these fittings and our reducer, valve and pump accessories on the same purchase order, which keeps material certificates and inspection formats consistent across the delivery.

Molding Capacity, Melting and Finishing

Capacity is matched to part size rather than quoted as a single figure. Small automotive parts run on the vertical sand-shot horizontal parting boxless shot-press molding line, sized 610 × 510 × 240 mm at 120 boxes per hour. Small and medium parts run on the upper and lower sand-shot boxless line, sized 750 × 650 × 250 mm at 100 boxes per hour. Three 1.25 T medium-frequency electric furnaces let us change grade between heats without losing control of carbon and silicon, and coated sand cores handle the internal passages that automotive castings depend on.

Finishing today covers three cleaning shot blasting machines, three CNC lathes and three lathes. A lost foam line for 100 kg to 1000 kg castings is in planning, alongside an automatic spray painting line and an electrophoretic coating line, which extend our scope for larger structural castings and coated delivery.

Accuracy, Material Verification and Acceptance Testing

Inspection follows the process, not just the finished pallet. Each operation is checked as it completes, and finished automotive castings are inspected in full against the customer's requirements and the applicable international standards, with joint inspection possible when a customer prefers to verify alongside our inspectors.

Verification area Equipment What it confirms
Chemical composition German SPECTRO direct-reading spectrometer Carbon, silicon, manganese, phosphorus, sulphur and alloying elements per heat
Mechanical properties Universal tensile testing machine, 3T Brinell hardness tester Tensile strength, elongation and hardness on cast test bars
Microstructure Metallographic microscope, sonic velocity meter Graphite form and nodularity, matrix structure, nodule count
Internal soundness Magnetic particle flaw detector, ultrasonic flaw detector Surface and sub-surface discontinuities, internal defects in safety-relevant castings
Molding sand SAC hammer-type sample making machine, SWY hydraulic strength testing machine, SSZ vibration-type sand screening machine, SGS double-disc infrared dryer Green strength, moisture, grain distribution and compactability that drive dimensional repeatability

Configuration Options and Machining Scope

Each automotive casting can leave the foundry at several stages of completion, and the chosen stage is fixed at quotation so that price, lead time and acceptance criteria line up.

  • As-cast with gates removed — for parts machined on the customer's own line
  • Shot blasted — consistent surface condition for coating or inspection
  • Machined — turning, facing, boring and threading on three CNC lathes and three lathes to drawing callouts
  • Coated — spraying and electrophoretic coating are being added to the finishing route; colour and packaging design follow customer requirements on ODM programs

ODM/OEM Project Flow and Information We Use to Configure Your Solution

Our ODM and OEM route runs in six controlled stages: drawing or sample confirmation and quotation, pattern and mould making, sample castings, customer approval of the sample, mass production, and inspection before shipment. Simulation and process review are used during pattern development to shorten the sample cycle and reduce scrap.

  • Drawing or 3D model, plus a sample when geometry is easier to confirm physically
  • Material grade and the loads or duty the component sees in service
  • Casting weight, envelope and wall-thickness range against our molding box sizes
  • Annual volume, batch size and call-off pattern
  • Machining, coating and surface callouts, including stock left for customer machining
  • Inspection criteria, non-destructive testing scope and any joint-inspection requirement
  • Marking, packaging, documentation set and delivery destination

Packaging, Delivery and Documentation

Automotive castings are packed according to weight, finish and the risk of handling damage, with customer marking and pallet or crate arrangements agreed before the first shipment. Sea freight is our standard export mode; air freight is used when a customer's build schedule is urgent, and both Ningbo and Shanghai International Airport sit within reach of the foundry. Material certificates, test reports and dimensional records are prepared for the shipment, and the final document set is confirmed at the sample approval stage. Our products are mainly exported to Germany, Japan, Italy, South Korea and Australia.

Frequently Asked Questions

How do we decide between ductile and grey iron for an automotive casting?

Ductile iron is the choice where tensile strength, elongation and fatigue life carry the load, as in calipers, brackets and support arms. Grey iron suits housings, covers, manifolds and brake discs, where damping, thermal conductivity and machinability matter more than elongation. Tell us the duty the part sees and we will confirm the grade against the drawing.

Can you produce from our drawing or a sample?

Yes. We work from customer drawings or samples on every automotive program and make the patterns or moulds after the order is confirmed. Samples are cast and submitted for approval before mass production begins.

What capacity and casting sizes can you handle?

Annual casting capacity is 15,000 tons across our automatic and semi-automatic clay sand lines and the coated sand line. The boxless molding lines at 610 × 510 × 240 mm and 750 × 650 × 250 mm suit high-volume small and medium parts. A lost foam line for 100 kg to 1000 kg castings is under planning.

How is quality controlled and documented?

We operate under the IATF 16949:2016 system standard. Raw materials are checked, each process step is inspected, and finished parts are fully inspected against customer requirements and international standards. Chemical, tensile, hardness, metallographic, magnetic particle, ultrasonic and sand testing results support the shipment documentation.

Do you machine and finish parts before delivery?

Yes. Three CNC lathes and three lathes handle turning, facing, boring and threading, and three shot blasting machines set the surface condition. Spray painting and electrophoretic coating lines are being added, and colour and packaging design can be customized on ODM programs.

What are your shipping and payment terms?

Shipment is usually by sea, with air freight available when the schedule is urgent. Payment terms are confirmed at quotation; for mass production we normally work with a 50% advance payment and the balance after inspection and confirmation before shipment.