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

Ductile Cast Iron Manufacturers

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 significantly improves the mechanical properties of cast iron, especially its plasticity and toughness, making it have quality strength than carbon steel. This good property makes ductile iron widely used in the manufacture of parts that require high strength, toughness and wear resistance in complex stress environments, such as crankshafts, camshafts of automobiles, tractors and internal combustion engines, and casting of general mechanical components such as medium-pressure valves.

Ductile Cast Iron Automotive Parts
Ductile Cast Iron Agricultural Machinery Parts
Ductile Cast Iron Reducer Accessories
Ductile Cast Iron Valve Accessories
Ductile Cast Iron Water Pump Accessories
Ductile Cast Iron Semiconductor Accessories
Ductile Cast Iron Industrial Robot Accessories
Other Ductile Cast Iron Accessories
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 Manufacturers and Ductile Iron Castings 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
Ductile Cast Iron Industry knowledge
Key Properties of Ductile Cast Iron
One of the most notable properties of ductile cast iron is its remarkable strength-to-weight ratio, which combines the benefits of high tensile strength with relatively low material weight. The spherical graphite structure enhances the material’s overall strength, making it comparable to steel in certain applications, yet it remains much easier to cast due to its liquid form. This balance of strength and weight is especially advantageous in industries such as automotive manufacturing, where components must withstand high stress and loading conditions without adding unnecessary weight to the system. Ductile cast iron is often used for producing engine blocks, gearboxes, and other critical components that require high strength while maintaining a manageable weight for better performance and fuel efficiency. Yancheng Longwan Machinery Co., Ltd. produces ductile cast iron components for industries like automotive and industrial robotics, where a high strength-to-weight ratio is a critical design factor. The company’s investment in advanced molding lines, such as a vertical sand-shot horizontal parting boxless shot-press molding line, ensures that the final products are optimized for both strength and weight, providing optimal performance in these demanding sectors.

Ductile cast iron has superior shock resistance and toughness, which is attributed to the presence of nodular graphite. The spherical shape of the graphite particles allows the material to absorb and distribute stress more effectively than other forms of cast iron. This property makes ductile cast iron an ideal choice for applications that experience cyclic loading, sudden impacts, or vibration. Components like suspension parts in vehicles, machinery used in heavy industries, and agricultural equipment often experience high-impact forces. Ductile cast iron components from Yancheng Longwan Machinery Co., Ltd. are engineered to withstand such dynamic stresses, ensuring long-term performance and reliability in challenging conditions. The company’s use of advanced medium-frequency electric furnaces and shot-blasting machines further enhances the material’s resilience, ensuring optimal toughness and impact resistance.

Ductile cast iron exhibits excellent wear resistance, which is a critical property for components exposed to abrasive environments or high friction. The material’s microstructure, with its spherical graphite nodules, allows it to withstand prolonged contact with abrasive surfaces without experiencing significant degradation. This property is particularly important in applications like industrial machinery, automotive components (such as brake rotors), and mining equipment, where wear and tear are common. Yancheng Longwan Machinery Co., Ltd. capitalizes on this property to produce highly durable and wear-resistant ductile cast iron components for industries like industrial robotics and agriculture. The company's expertise in using advanced sand-shot molding lines and CNC machining processes ensures that the final products offer outstanding wear resistance while maintaining precise tolerances and high-quality surface finishes. The company’s planned introduction of a lost foam production line is expected to enhance wear resistance by enabling the creation of complex geometries that offer improved functionality and longevity in harsh operating environments.

Ductile cast iron offers excellent machinability, which makes it easier to fabricate into complex shapes and components compared to other metals like steel. Despite its high strength, ductile cast iron maintains a good balance of hardness and machinability. The material can be easily cast, drilled, tapped, and machined with conventional equipment, reducing production time and costs. At Yancheng Longwan Machinery Co., Ltd., ductile cast iron components undergo rigorous machining processes to ensure that they meet precise specifications. The company’s investment in CNC lathes and other precision tools allows for the production of complex geometries and fine tolerances.

Ductile cast iron exhibits a higher degree of corrosion resistance than gray cast iron, particularly when exposed to harsh environmental conditions. The material’s microstructure, with its nodular graphite, reduces the tendency for the iron to form rust and corrosion products. This makes ductile cast iron ideal for use in applications where exposure to moisture, chemicals, or high humidity is common. It is used for manufacturing water pipes, fire-fighting fittings, and various industrial components exposed to corrosive environments. Yancheng Longwan Machinery Co., Ltd. produces a wide range of ductile cast iron products, such as fire-fighting pipe fittings and other industrial components that require exceptional corrosion resistance. The company’s commitment to using high-quality raw materials and advanced casting technologies ensures that its ductile cast iron products provide reliable performance even in the most challenging environments. The company’s ongoing development of an automatic spray painting line and electrophoretic coating line will further enhance the corrosion resistance of its products, providing additional layers of protection against environmental wear.