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Yancheng Longwan Machinery Co., Ltd. HOME / PRODUCTS & APPLICATION / Ductile Cast Iron / Ductile Cast Iron Agricultural Machinery Parts

Ductile Cast Iron Agricultural Machinery Parts Foundry

Ductile Cast Iron Agricultural Machinery Parts mainly include various bridges, brackets and other structural parts. Ductile iron is widely used in agricultural machinery manufacturing due to its good mechanical properties and durability. Its high strength and good toughness ensure reliability and durability in harsh working environments. These parts can not only withstand heavy loads and impacts, but also have good wear resistance and corrosion resistance, suitable for long-term field operations. The machinability of ductile iron enables it to achieve high precision and complex shapes during the manufacturing process, providing a solid guarantee for the efficient operation of agricultural machinery.

Ductile Cast Iron Agricultural Machinery Parts OEM/ODM
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 Ductile Cast Iron Agricultural Machinery Parts Foundry and Ductile Cast Iron Agricultural Machinery Parts Suppliers, 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
Ductile Cast Iron Agricultural Machinery Parts Industry knowledge

As a Ductile Cast Iron Agricultural Machinery Parts manufacturer, we cast and machine the load-bearing and structural components that keep tractors, implements and harvesting equipment working in abrasive, high-impact field conditions. Yancheng Longwan Machinery Co., Ltd. was founded in 2006 in Yancheng City, Jiangsu Province, and now produces ductile and grey iron castings for agricultural machinery, automotive, reducer, valve, fire-fighting pipe fitting and industrial robot applications.

Our agricultural range covers bridges, brackets, housings, covers, bearing seats and other structural parts supplied to customer drawings or samples. Melting runs on 1.25 t medium-frequency electric furnaces, molding on automatic clay sand and coated sand lines, and every batch passes through an IATF 16949:2016 quality system with in-house spectrometric, mechanical, metallographic and non-destructive testing.

Why Ductile Iron Suits Agricultural Machinery Duty

Nodular graphite gives ductile iron the combination agricultural equipment needs: tensile strength and impact toughness in the same casting, without the brittle fracture behaviour of flake graphite iron. Parts spend their life under repeated shock loads from soil engagement, ballast, uneven ground and PTO torque reversal, so the material must absorb energy rather than crack at a stress riser.

  • Impact and fatigue resistance — nodular graphite blunts crack initiation at fillets, bolt bosses and corner radii.
  • Wear behaviour — surface hardness after controlled cooling and shot blasting supports sliding and abrasive contact at pins, seats and guide surfaces.
  • Corrosion tolerance — stable graphite structure resists the moisture, fertiliser and slurry exposure typical of field service.
  • Machinability — ductile iron turns, bores and threads cleanly, which is what allows us to hold tight fit dimensions on mounting faces and bores.

Our Cast Iron Part Range and Where Each Family Fits

We pour both nodular and flake graphite iron, so the material is selected against the duty of the part rather than the convenience of the foundry. The table below shows how our product families are positioned.

Product family Typical castings Material behaviour Application fit
Ductile Cast Iron Agricultural Machinery Parts Bridges, brackets, housings, covers, mounting and structural parts High strength with toughness under shock Tractor, implement and harvester assemblies in field duty
Ductile Cast Iron Automotive Parts Caliper bodies, carriers, knuckles, suspension brackets Pressure and fatigue resistance On-road load paths and braking hardware
Ductile Cast Iron Reducer Accessories Gearbox housings, end covers, bearing seats Stiffness, damping, dimensional stability Drive trains on implements and auxiliary machinery
Valve, water pump and pipe fitting castings Bodies, bonnets, wedges, pump housings, fire-fighting fittings Pressure tightness, corrosion resistance Irrigation, water treatment and process lines
Grey Cast Iron Agricultural Machinery Parts Weight carriers, covers, plates, non-critical brackets Vibration damping and thermal stability Statically loaded parts where stiffness matters more than elongation

Our wider cast iron programme is listed under Ductile Cast Iron, including robot, semiconductor and other accessory castings produced on the same lines and inspection system.

Molding Lines, Melting and Throughput

Two boxless sand-shot molding lines handle the bulk of agricultural work, supported by automatic clay sand lines, a coated sand line for cores and complex internal geometry, and three cleaning shot blasting machines. Annual casting capacity is approximately 15,000 t.

Equipment Stated specification Best-fit production
Vertical sand-shot, horizontal parting boxless molding line 610 × 510 × 240 mm, 120 boxes/hour High-volume small brackets, bosses and covers
Upper/lower sand-shot, horizontal parting boxless molding line 750 × 650 × 250 mm, 100 boxes/hour Small and medium housings, bridges, structural parts
Medium-frequency electric furnaces 3 × 1.25 t Controlled melting, alloying and pouring temperature
Clay sand lines 2 automatic + 1 semi-automatic Repeat series production
Coated sand line 1 line Cores and internal passages
Machining 3 CNC lathes, 3 lathes Faces, bores, threads and fit dimensions
Planned expansion Lost foam line for 100 kg–1000 kg castings; automatic spray painting and electrophoretic coating lines Larger structural castings and coated finished parts

Machining and Surface Finishing

Turning, boring, drilling and thread cutting are carried out on our own CNC and conventional lathes, so mounting faces, bearing seats and fastener positions can be delivered to the drawing instead of left as-cast. After cleaning shot blasting, castings are checked before and after machining; coating is applied where the drawing or service environment requires it.

Quality Control and Acceptance Testing

Our IATF 16949:2016 system covers the full sequence from incoming raw material through melting, molding, pouring, cleaning and machining. Inspection equipment is kept in-house, which means material and geometry results are produced from our own process rather than subcontracted after the fact.

  • German SPECTRO direct-reading spectrometer for chemical composition and nodularising element control
  • Universal tensile testing machine for tensile strength, yield and elongation
  • 3 t Brinell hardness tester and sonic velocity meter for hardness and nodularity assessment
  • Metallographic microscope for graphite form, nodule count and matrix structure
  • Magnetic particle and ultrasonic flaw detection for surface and internal discontinuities
  • Molding sand testing: SAC hammer-type sample making machine, SWY hydraulic strength testing machine, SSZ vibration sand screening machine, SGS double-disc infrared dryer

Finished parts are inspected against the agreed drawing before shipment, with dimensional reports and material test results prepared for the delivery. Non-destructive testing and sampling frequency are agreed part by part, based on the criticality of the feature rather than a single default plan.

OEM/ODM Configuration and Project Workflow

We work from customer drawings or samples and cast by customization rather than from a standard catalogue, which is why pattern design, gating and machining allowance are settled before a mould order is released.

  1. Drawing and sample review — material grade, critical dimensions, machining scope and coating requirement confirmed, then quoted.
  2. Pattern and mould making — gating, risering and shrinkage allowance designed for the part geometry.
  3. Sample castings — produced from the pattern and submitted for dimensional and material approval.
  4. Series production — released after written confirmation of the sample.
  5. Inspection — in-process checks plus final inspection to drawing or international standards, with joint inspection available.
  6. Shipment — dispatched after the inspection result is approved.

Information We Use to Configure Your Solution

A proposal is prepared from the working point of the part, not from a generic price list. The following inputs let us fix material, pattern, machining scope and inspection plan in one pass.

  • 2D drawings or 3D models, including machining allowances and datum callouts
  • Required material grade, hardness and any impact or elongation requirement
  • Annual volume, batch size and delivery pattern
  • As-cast or fully machined delivery, plus coating specification
  • Critical dimensions, functional fits and surfaces that must remain unmachined
  • Inspection and documentation requirements, including NDT extent
  • Packaging format, pallet or returnable container preference

Packaging, Documentation and Delivery Scope

Castings are cleaned, de-scaled and protected for sea freight, which is our standard export route from Jiangsu; air freight is arranged when a project schedule requires it. Packaging design can follow customer requirements for labelling, part segregation and pallet configuration.

Each shipment is accompanied by the agreed inspection records and material certificates. For first articles we provide sample parts for fit trials before series release, so assembly interfaces and torque points can be verified on your line before volume production begins.

Frequently Asked Questions

Which agricultural machinery parts do you cast in ductile iron?

Bridges, brackets, housings, covers, bearing seats and other structural castings for tractors, implements and harvesting equipment. We also produce related families on the same lines: automotive parts, reducer accessories, valve and water pump castings, fire-fighting pipe fittings and pipe fittings.

Which ductile iron grades can you supply?

We pour to the nodular iron grade specified on the drawing, typically in the EN-GJS-400-15, EN-GJS-500-7 and EN-GJS-600-3 range, and confirm chemistry, tensile properties, elongation and hardness against that requirement. Where a part is statically loaded and stiffness dominates, we will quote grey iron from the same foundry instead.

Can you deliver machined and coated parts rather than raw castings?

Yes. We machine on our own CNC and conventional lathes and can supply finished parts with faces, bores and threads cut to drawing. Coating capability is being extended with automatic spray painting and electrophoretic coating lines alongside our existing cleaning and shot blasting operations.

What documentation accompanies a shipment?

Chemical composition from the SPECTRO spectrometer, tensile and hardness results, metallographic assessment where specified, dimensional inspection reports and non-destructive test records when magnetic particle or ultrasonic examination is part of the agreed plan.

What is the smallest and largest casting you produce?

The two boxless molding lines cover small and medium parts at high repetition — one suited to small brackets and covers at 120 boxes per hour, the other to medium housings and structural castings at 100 boxes per hour. A lost foam line is planned for castings from 100 kg to 1000 kg, which extends our range into larger structural components.