Reliable & Durable Cast Iron Components
With high compressive strength, excellent vibration damping, superior wear resistance, and stable machinability, cast iron components are widely employed in agricultural machinery, construction equipment, cement and building materials, pumps and valves, and machine tool structural parts. Compared to other metallic materials, cast iron offers significant advantages in cost control, batch-to-batch consistency, and the ability to form complex geometries.
Cast Iron Castings – Advantages & Applications
With high compressive strength, excellent vibration damping, superior wear resistance, and stable machinability, cast iron components are widely employed in agricultural machinery, construction equipment, cement and building materials, pumps and valves, and machine tool structural parts. Compared to other metallic materials, cast iron offers significant advantages in cost control, batch-to-batch consistency, and the ability to form complex geometries.
Reliable & Durable Cast Iron Components
As a iron castings manufacturer, Matech Industry Ltd. specializes in the production and precision machining of gray iron, ductile iron, and alloy iron castings. We offer a full range of casting processes, including sand casting, resin sand casting, and shell molding, supported by in-house CNC precision machining, heat treatment, surface finishing, and full dimensional inspection. Whether you require transmission housings, impellers, sprockets, pulleys, or agricultural gearboxes, our integrated one-stop manufacturing capabilities deliver high-quality, ready-to-use components.
Why Choose Matech for Iron Castings & Precision Machining?
Producing high-quality cast iron components involves much more than just the casting process itself. It demands precise material control, manufacturing process design, consistent heat treatment, and reliable post-machining capabilities. When casting and machining are split between different suppliers, issues (such as dimensional discrepancies, inconsistent datum references, difficulty in tracing internal defects), increased communication costs, and higher project risks are common. At Matech, we integrate casting, heat treatment, CNC precision machining, surface treatment, and quality inspection under a single manufacturing and quality management system. As a iron castings manufacturer, simply provide your drawings or samples, and our engineering team would manage the entire workflow in a coordinated manner,
· Process evaluation
· Material selection guidance
· Casting Process design
· Machining process optimization
· Dimensional and quality control
· Final packaging and delivery
This fully integrated, end-to-end approach gives you more consistent part quality, higher production efficiency, and greater peace of mind when it comes to on-time delivery.
Our Iron Casting & Machining Process
Raw Material Inspection
We strictly control the chemical composition and mechanical properties of pig iron, scrap steel, return material and various alloy elements. Each batch is inspected and traceable in accordance with ISO, ASTM, DIN, JIS, GB and other international standards. We use spectrum analysis, rapid ladle testing and batch record management. It ensures stable microstructure and casting performance for each molten iron batch.
Batching and Melting
We precisely proportion pig iron, scrap steel, return material and alloys according to different material grades and performance requirements. Medium frequency induction furnaces are adopted for melting. During production, we strictly control molten iron temperature, carbon equivalent and inoculation quality. It guarantees good purity, fluidity and stable microstructure of molten iron, and keeps consistent casting quality from the source.
Casting Molding
We flexibly choose proper casting processes including sand casting, resin sand casting, shell mold casting and lost foam casting according to product structure, dimensional requirements and production batch volume to produce good-quality casting blanks.
Shakeout and Surface Cleaning
After the casting solidifies and cools down, perform shakeout, cut off gates and risers, and remove burrs. Then use shot blasting and grinding to take off surface scale and leftover sand. This step improves the surface quality of the casting, which provides a good basis for subsequent heat treatment and machining.
Heat Treatment
Use annealing to remove internal stress in castings and prevent parts from deforming or cracking. Use normalizing to refine the material structure. If needed, apply surface hardening to increase the hardness and wear resistance of the part surface.
Precision CNC Machining
We are equipped with over 50 imported CNC machining centers, CNC lathes and gantry machining equipment for high-precision machining of complex components. The key dimension machining accuracy is controlled within ±0.005~0.01 mm, ensuring all dimensional and geometric tolerances of every part fully comply with customer drawing specifications.
Deburring and Cleaning
We combine manual trimming with automated equipment to precisely remove machining burrs, sharp edges and residual particles.Parts are thoroughly cleaned to eliminate surface oil contamination and metal chips, ready for subsequent surface treatment and assembly.
Surface Treatment
We provide a full range of surface treatments according to service conditions and customer requirements, including sandblasting, electroplating, painting, phosphating, blackening, Dacromet coating and anti-rust coating.All treatments enhance corrosion resistance and optimize surface finish.
Full-Dimensional Inspection and Quality Control
We use CMM, spectrometers, roughness testers, hardness testers, and various custom gauges. All key dimensions are 100% inspected. When required, we also perform non-destructive testing such as ultrasonic (UT), magnetic particle (MT), and penetrant (PT) testing. This ensures that every part delivered meets drawing, tolerance, and industry standard requirements.
Packaging and Global Shipping
For different shipping methods and international market needs, we provide professional and customizable anti-rust packaging. Each shipment includes full material report, dimensional inspection reports, and export clearance documents. Supported by mature international logistics, we guarantee on-time and intact delivery to customers around the world.
Iron Castings & Machining Products
This Equipment Foot Pedal Casting is a core structural and operator-interface component designed for machinery access platforms, truck step assemblies, special equipment boarding systems, and special vehicle operator stations.
This Equipment Handrail Casting is a core structural and ergonomic component designed for machinery access systems, truck cabin entry points, special equipment operator platforms, and special vehicle boarding systems.
This Turbocharger Cast Iron Turbine Housing (Exhaust Turbine Shell) is a core thermal-structural and exhaust-gas-directing component designed for turbocharger assemblies in machinery, trucks, special equipment, and special vehicles.
This Cast Iron Sewage Pump Impeller (9-Blade Centrifugal Type) is a core rotational and fluid-boosting component designed for sewage lift pumps, septic tank drainage pumps, chemical clean water pumps, agricultural irrigation pumps, slurry transfer pumps, and municipal water supply and drainage equipment.
This Cast Iron Sewage Pump Impeller (3-Blade Centrifugal Type) is a core rotational and fluid-boosting component designed for sewage lift pumps, septic tank drainage pumps, chemical clean water pumps, agricultural irrigation pumps, slurry transfer pumps, and municipal water supply and drainage equipment.
This Gearbox Housing Casting is a core structural and fluid-containing component designed for mining machinery transmission systems, heavy-duty conveyor drives, crusher gearboxes, and industrial speed reducer assemblies.
This Industrial Equipment Fluid Connection Fitting is a core fluid-handling and load-bearing connection component designed for industrial equipment fluid systems.
This Industrial Fluid Connection Fitting is a core fluid-handling and connection component designed for industrial fluid transfer systems, hydraulic piping networks, and process equipment fluid interfaces.
This Dual-Chamber Cast Iron Pump Housing Casting is a core fluid-handling and pressure-containing component designed for municipal and industrial wastewater treatment systems, sewage lift stations, and sludge transfer pump assemblies.
This Industrial Robot Arm Body Castings is a core structural and load-bearing component designed for automated production line robotic arms.
This Cast Iron Heating Plate is a core thermal-functional component designed for laboratory hot plates and testing equipment . It is manufactured by our in-house Sand Casting (Resin Sand) + CNC precision machining process to achieve high strength, precise flatness across the heating surface, and uniform heat distribution.
This Ductile Iron Butterfly Valve Body & Disc Assembly is a core fluid control and pressure-containing component designed for industrial water treatment plants. It is manufactured by our in-house Sand Casting (Resin Sand Shell Molding) + CNC precision machining process to achieve high strength, precise seat and disc sealing geometry, and reliable pressure-tight closure.
Applicable Scenarios
Our iron castings and precision machined parts are used in the following industries:
Tractor transmission housings, engine cylinder heads, flywheels, sprockets and pulleys.
Hydraulic valve bodies, bearing housings for travel mechanisms, track shoes and bearing seats.
Gray iron pump housings, ductile iron valve bodies, valve covers, flanges and pipe fittings.
Engine brackets, steering knuckles, control arms, exhaust manifolds and differential housings.
Machine columns, support bases, guide rail bases and motor housing.
Our Service Process
From request to delivery, every step is clear and transparent
Ready to Start Your Project?
Let us customize your metal component solutions. No matter which industry you are in, Matech’s engineering team is ready to discuss the most suitable solutions for you.
Iron Casting & Precision Machining Capabilities
We organize our Iron casting and machining services into four key areas based on our customers’ core needs, covering every step from raw materials to finished products.
Core Process of Cast Iron Parts
Based on your product's shape complexity, batch volume, dimensional accuracy, and performance needs, Matech uses 15+ years of casting experience and manufacturing capability to recommend the most suitable casting method. This helps achieve the best balance among cost, accuracy, strength, and production efficiency.
Matech's automatic molding line uses automated molding equipment, giving even sand hardness and high production efficiency. It is suitable for medium to large iron castings made in high volumes with tight dimensional consistency requirements. This process controls sand properties and molding parameters precisely, ensuring stable casting dimensions and good surface quality.
Process Advantages
• High production efficiency
• Good dimensional consistency
• Suitable for medium to large castings
• Suitable for high-volume production
Typical Applications:
Transmission housings, sprockets, agricultural gearboxes, vehicle control arms, bearing housings, hydraulic valve bodies, etc.
Process Advantages
• High production efficiency
• Good dimensional consistency
• Suitable for medium to large castings
• Suitable for high-volume production
Typical Applications:
Transmission housings, sprockets, agricultural gearboxes, vehicle control arms, bearing housings, hydraulic valve bodies, etc.
Resin sand casting uses furan resin or phenolic resin as a binder. The sand has high strength and good collapsibility. Compared with ordinary green sand, the surface quality of the castings is better, and casting dimensional accuracy can reach CT7 to CT9 grades. Matech's resin sand production line is suitable for making medium to large iron castings with high accuracy and complex shapes.
Process Advantages
• Higher dimensional accuracy
• Good surface quality
• Suitable for complex parts
• Good process stability
Typical Applications:
Construction equipment brackets, gearbox housings, hydraulic valve bodies, etc.
Process Advantages
• Higher dimensional accuracy
• Good surface quality
• Suitable for complex parts
• Good process stability
Typical Applications:
Construction equipment brackets, gearbox housings, hydraulic valve bodies, etc.
Shell mold casting uses pre-coated sand to form a thin shell cavity on heated metal molds.
It provides high dimensional accuracy up to CT6-CT8 and low surface roughness of Ra 6.3-12.5 μm for iron casting.This process is suitable for batch production of small iron castings with thin walls and high surface quality requirements.
Process Advantages:
• Excellent surface finish
• Suitable for thin-wall structures
• Higher dimensional accuracy
• Lower subsequent machining cost
Typical Applications
Thin-wall shell parts, agricultural machinery wear-resistant parts, automotive components, precision connection parts, etc.
It provides high dimensional accuracy up to CT6-CT8 and low surface roughness of Ra 6.3-12.5 μm for iron casting.This process is suitable for batch production of small iron castings with thin walls and high surface quality requirements.
Process Advantages:
• Excellent surface finish
• Suitable for thin-wall structures
• Higher dimensional accuracy
• Lower subsequent machining cost
Typical Applications
Thin-wall shell parts, agricultural machinery wear-resistant parts, automotive components, precision connection parts, etc.
Related Cases
Matech supplies custom stainless steel cam brackets for Russian conveyor lines. For this client, Matech suggested switching the material from 316 stainless steel to duplex 2205 after a technical assessment. Verified by samples, the client approved the plan and placed repeat orders. The 200-set brackets went through casting, machining, and electropolishing, inspected before shipment. Packed in one wooden case (250kg gross weight), the goods were shipped via the Xinjiang logistics center by rail. Starting in 2023, this first custom bracket order earned client recognition, forming steady annual supply cooperation. Matech delivers tailored metal parts with full-process quality control for global industrial buyers.
Selecting the right manufacturing method plays an important role in controlling product quality, production cost, and overall project success. Two widely used options in modern manufacturing are CNC machining and casting. Both methods can create high-quality metal components, but they work in very different ways.
Manufacturing industries are constantly looking for better ways to produce metal components with stable quality, faster production cycles, and controlled costs. Automatic molding casting has become an important solution for companies that need large quantities of metal parts with consistent quality.
Choosing the right casting process is one of the most important decisions when manufacturing metal parts. The production method affects product quality, manufacturing cost, surface finish, production speed, and the amount of machining required after casting.
Frequently Asked Questions
1
What casting processes does Matech mainly use for iron castings?
We offer sand casting, resin sand casting, and shell mold casting. Sand casting is suitable for medium-to-large parts and small-to-medium batch sizes. Resin sand casting provides higher accuracy and better surface finish. Shell mold casting is ideal for thin-walled, high-precision small parts in larger volumes. Our engineering team will recommend the most suitable process based on your product requirements.
2
For iron casting, what material grade you usually do?
We can do both gray iron and ductile iron castings. And the material grades we frequently used here include HT100, HT150, HT200, HT250, HT300, HT350, HT400, QT400-18, QT450-10, QT400-15, QT600-3, and QT800-2 so on. If you require any other material grade, please kindly share with us, and we can also do the materials according to your requirement.
3
What tolerance can you meet by iron casting?
About dimensional tolerance of iron casting, please check the details as below:
① Sand casting by hand molding: casting tolerance is CT11~14 normally.
② Sand casting by machine molding, or shell molding: casting tolerance is CT8~12 normally.
① Sand casting by hand molding: casting tolerance is CT11~14 normally.
② Sand casting by machine molding, or shell molding: casting tolerance is CT8~12 normally.
4
What are the factors that affect the price of cast iron products?
Generally speaking, the factors that affect the price of cast iron products mainly include: molding process, molding type, molding method, product structure and shape, precision requirements, required quantity, product weight, qualification rate of finished product, etc.
5
What's the advantage of machine molding?
Regarding machine molding, sand filling + sand tightening + mold removal are all completed by machines. Therefore, its production efficiency is very high, the castings size is more precise, the surface roughness is also better, the machining allowance is small, and the labor intensity is low. Especially the product quality made by machine molding is very stable. It is very suitable and popular for large batch production.
6
What significant economic benefits does shell mold casting offer?
Despite higher upfront mold and material costs, shell mold casting significantly reduces or even eliminates the need for post-casting machining. This greatly shortens the overall production cycle and lowers comprehensive processing costs. Additionally, the process boasts high material utilization and a low defect rate, offering excellent cost-effectiveness for large-volume orders demanding high performance and efficiency.
7
What are the core advantages of an automatic molding line compared to traditional manual molding?
Automatic molding lines offer extremely high production efficiency (typically over 200 molds/hour) with a stable production cycle. They not only significantly reduce labor intensity, but also ensure high dimensional consistency and precision, making them ideal for mass production of small to medium-sized gray and ductile iron castings.
8
Why do cast iron parts sometimes have defects like porosity or sand burn-on?
This is usually related to the moisture, grain size, and coal dust content of the molding sand. Porosity is often caused by excessive moisture and poor permeability, while sand burn-on or rough surfaces are typically due to coarse raw sand grains or insufficient coal dust. Strictly controlling the temperature of the reclaimed sand and the efficiency of the dust removal system can effectively reduce these defects.
9
Why is resin sand casting particularly suitable for large or structurally complex cast iron parts?
Resin sand has excellent flowability and can fill complex molds without ramming. It possesses high strength before demolding, preventing deformation. For ultra-large thick-walled parts like No. 45 ductile iron machine tool components, the resin sand process works seamlessly with large cross-section gating systems to ensure smooth filling, effectively avoiding cold shuts and slag inclusions while guaranteeing internal quality.
10
What special requirements does the resin sand process have for the base sand?
Resin sand has strict requirements for raw sand. To ensure good permeability and minimize resin consumption, the raw sand must have low clay and micro-powder content, along with a reasonable grain size distribution (often using multi-grade screened sand).
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