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
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. 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 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.
This Ductile Iron Exhaust Manifold is a core fluid-handling component designed for heavy-duty diesel truck engines. It is manufactured by our in-house Sand Casting (Resin Sand Shell Molding) + CNC precision machining process to achieve high strength, precise port alignment, and reliable exhaust gas sealing.
This Ductile Iron Clamp-on Split Conveyor Sprocket is a core power transmission and wear-resistant component designed for quarry material handling conveyors.
This Ductile Iron Pump Housing is a core fluid-handling and pressure-containing component designed for industrial centrifugal pump assemblies . It is manufactured by our in-house Sand Casting (Resin Sand Shell Molding) + CNC precision machining process to achieve high strength, precise impeller chamber geometry, and reliable pressure-tight sealing.
This Ductile Iron Gearbox Housing is a core structural component designed for Special-purpose vehicles transmission systems . It is manufactured by our in-house Sand Casting (Green Sand Molding) + CNC precision machining process to achieve high strength, precise bearing bore geometry, and reliable oil-tight sealing.
This Cast Female HT300 Iron Thread Tee is a core pipeline branching and distribution component designed for industrial compressed air distribution systems. It is manufactured by our in-house Sand Casting + CNC machining and threading process to achieve high strength, precise geometry, and reliable thread sealing.
This Cast Iron 90° Female Thread Elbow is a core pipeline direction-change and fluid-handling component designed for industrial water supply networks . It is manufactured by our in-house Sand Casting (Resin Sand) + CNC machining and threading process to achieve high strength, precise geometry, and reliable thread sealing.
This Cast Iron 90° Flanged × Female Thread Elbow is a core fluid-handling and pipeline component designed for industrial water supply systems . It is manufactured by our in-house Sand Casting ((Moldable sand / Resin sand available) + CNC machining process to achieve high strength, precise geometry, and reliable sealing surfaces.
This Ductile Iron Adjustable Mounting Bracket is a core structural and load-bearing component designed for heavy equipment adjustable support frames . It is manufactured by our in-house Sand Casting (Green Sand Molding) + CNC precision machining process to achieve high strength, precise slot and pivot geometry, and reliable load distribution.
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
Our client is a U.S.-based automotive modification and after-sales service manufacturer specializing in high-performance racing engine modification, and serving professional racing teams and performance enthusiasts.
A globally top-three ranked European agricultural machinery manufacturer encountered a critical bottleneck in the development of its core high-speed grape harvester. The harvester's efficient operation relies entirely on a precise chain-type transmission mechanism, whose reliability in power transmission and motion execution hinges on a set of core link components.
Our partner is a Philippines-based integrated hazardous waste management company, offering one-stop services including hazardous waste collection, incineration, secure landfill and road transportation, with a total daily processing capacity of 6,000 tons.
Our client is a leading designer for special equipment, headquartered in Europe, known for creating high-end special equipment designs and customized advanced equipment solutions.
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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