Iron Casting Manufacturer in China

Iron Casting Services

As the top iron casting company in China, CFS Foundry provides custom iron casting services for various applications. We can cast high quality grey iron and ductile iron parts to meet the drawing’s specifications.

What is Iron Casting?

Iron casting is a specialized manufacturing process for producing complex iron parts that are difficult or impossible to realize by other processes. This technique dates back to thousands of years ago, which was mainly used to make tools and weapons.

Today, iron casting allows for producing many types of iron parts. Its process begins by melting raw iron materials in a furnace through high temperatures until they reach a liquid state. The iron is then carefully poured into molds, which are made according to the exact specifications of the desired part. Once the iron has cooled and solidified, the solid iron casting parts are removed from the molds. To achieve net shape parts, the cast iron parts may still need some finishing, like grinding, shot blasting, cnc machining, etc.

There are mainly 2 types of iron casting materials at CFS Foundry. Each casting material has its special characteristics and is suitable for different applications. Grey iron is well known for its good wear resistance and machinability, making it ideal for various wear parts. Ductile iron has higher strength and toughness than grey iron and is able to cast components like automotive parts, pumps, valve parts, pipe fittings, and so on.

5 Benefits of Iron Casting

Cast iron is an iron-carbon alloy with a high carbon content. Cast iron is one of the commonly used materials in metal casting due to its low material cost and special properties. CFS Foundry is skilled in iron casting technique, and the advantages of iron casting are summarized as follows:

Good Casting Performance

Cast iron has a low melting point, approximately 1150-1200°C, which gives it excellent fluidity and mold-filling capabilities. This allows for easy and rapid casting into shape. Additionally, the low internal stress generated during the casting solidification process reduces the likelihood of deformation and cracking in castings. These characteristics make iron casting highly suitable for manufacturing components with complex shapes and precise dimensions.

Easy Machining

Iron castings offer excellent machinability due to its moderate hardness. The chips produced during machining break easily, facilitating processing and reducing tool wear. Its graphite content acts as a lubricant, further enhancing machining efficiency. This means that machining of iron castings is relatively efficient, saving time and costs compared to materials that are difficult to machine.

Low Cost

Compared to stainless steel and other casting materials, the material cost of iron casting is low. Moreover, the iron casting production process is also simpler than steel casting process and high efficiency. This makes the overall cost of iron castings low and cost-effective. This feature is particularly suitable for the production of large orders and complex shapes of parts, greatly reducing production costs.

Good Wear Resistance

High Temperature Resistance

Due to its high carbon content and stable microstructure, iron castings are able to maintain good mechanical properties and dimensional stability at high temperatures. The high temperature resistance of cast iron is conducive to the production of engine blocks, exhaust manifolds, boiler components and other parts. Even at high temperatures, the strength of grey cast iron and ductile cast iron can still be maintained, effectively extending the service life of parts.

Common Used Material Standards in Iron Casting

Cast Iron	Standards
Cast Iron	GB	AWS	BS	NF	DIN	ISO
Grey Iron	HT200	No.30	Grade 220	EN-GJL-200	GG20	200
	HT250	No.35	Grade 260	EN-GJL-250	GG25	250
	HT300	No.45	Grade 300	EN-GJL-300	GG30	300
	HT350	No.50	Grade 350	EN-GJL-350	GG35	350
Ductile Iron	QT450-10	65-45-12	GGG-40	EN-GJS-450-10	450/10	450-10
	QT450-18	60-40-18	GGG-40	EN-GJS-450-18	400/18	450-18
	QT500-7	80-55-06	GGG-50	EN-GJS-500-7	500/7	500-7

Why CFS Foundry for Iron Casting Services?

CFS Foundry has a long history of iron casting production in China, we continue to upgrade our equipments and plant facilities, in order to provide our customers with the highest quality products using the latest lost foam casting and sand casting technology.

Our modern furnaces can help to reduce production times with faster melting, and enhance our ability to provide competitively priced high quality iron castings. Our knowledgeable and experienced team provides in-house heat-treating and metallurgical testing to ensure timely production of your order.

Located in Ningbo, China, CFS Foundry aims to provide the highest quality iron castings with the most competitive prices. Today, our company has become one of the largest iron casting companies in China.

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Iron Casting Processes At CFS Foundry

Type 1. Sand Casting

Sand casting is the process that utilizes non-reusable sand molds to form metal castings. Sand casting is used to produce a wide variety of cast iron components with complex geometries. In China, there are three types of sand casting techniques to make iron castings. They are precoated sand casting, resin sand casting and clay sand casting. Among them, precoated sand casting is the most precision sand casting process with general casting tolerance CT8. It is able to produce iron castings less than 2kgs. Clay sand casting is the second precision casting process with general casting tolerance CT9. Iron castings between 2kgs-60kgs are availble in this method. And resin sand casting is mainly used for the production of large iron castings above 60kgs.

Type 2: Lost Foam Casting

Lost foam casting is another casting technique for iron castings. It is a type of evaporative-pattern casting process that is similar to investment casting. But replace the wax with foam for the pattern. The advantages of lost foam casting is that the boiling point of foam is low, this helps to simplify the investment casting process by removing the need to melt the wax out of the mold. Cast iron is one of the commonly cast material in lost foam casting process. With lost foam casting, we can make small iron castings in good dimensional accuracy and surface finish. For large iron castings, sand casting is preferred.