Original manufacturer | IATF 16949 | ISO 14001 | ISO 9001 | Provide (MTC)
Reliable Metal Casting Manufacturer
Custom cast iron parts
We custom-produce various ductile iron, gray cast iron, and white cast iron parts to meet the customized needs of the automotive, machinery, industrial, and agricultural industries for wear-resistant, impact-resistant, and high-toughness components.
Custom cast steel parts
We offer custom-made castings from various steels including carbon steel, alloy steel, stainless steel, and manganese steel, covering high-strength, corrosion-resistant, and high-temperature-resistant castings such as valve bodies, pump bodies, flanges, gears, and valves.
Custom cast aluminum parts
We offer custom manufacturing services for various lightweight and precision aluminum castings, using processes including die casting, gravity casting, and investment casting, with tolerances up to ±0.15 mm.
Other custom casting service
We provide custom casting services
Mulan Group is a professional precision casting supplier in China. We have a team of experts who have 12 years of experience in producing casting parts, from prototypes to molds, and then to production. We can guarantee to provide you with satisfactory products, and our technology is constantly upgraded to meet your needs and standards for prototypes and production-level molds. In addition, we also have CNC, Machined and other metal forming processes to meet your needs for different metal forming manufacturing.
Casting materials we can make：including stainless steel, brass, titanium, aluminum, carbon steel, bronze, iron and more.
The casting processes we support include: Investment Casting, Sand Casting, Gravity casting, Ductile Iron Casting, Die casting. We are capable of meeting the casting process requirements of clients across various industries. Moreover, based on the samples or specifications you provide, we will offer appropriate casting process recommendations to ensure the successful completion of your commissioned casting products.
We specialize in a wide range of custom metal cast parts as mentioned above and include:
- Electric Motor Housings
- Gear Boxes
- Pump Housings and Parts
- Valve Bodies and Parts
- Marine parts and Sporting equipment parts
- And many other industrial and commercial cast metal parts
We can provide metal casting services for the following industries. Of course, we are not limited to these industries. As long as you have customized casting needs, you can find us
Possesses the capability to cast complex structural components and thin-walled parts, enabling the precision manufacturing of various types of castings
Oil and Gas
Automobile
Aviation
Mechanical equipment
Mining equipment
Wind power equipment
Seawater filtration equipment
Other industries
Stable casting process
As a professional casting partner, Mulan Group’s competitive advantage lies in process stability across a variety of casting methods, including sand casting, investment casting, precision casting, and die casting. Global B2B clients value not only product precision but also the ability to deliver consistent, repeatable results. We achieve this by integrating advanced process control, a certified quality system, and comprehensive in-house testing. From mold design and pattern making to melting, pouring, cooling, and processing, each step utilizes standardized parameter recording and real-time monitoring to minimize variation. Critical elements such as metal composition, pouring temperature, cooling rate, and heat treatment cycle are rigorously controlled and verified to ensure stable microstructure and mechanical properties. Mulan Group’s laboratory is equipped with a spectrometer, coordinate measuring machine (CMM), tensile and impact testing machines, and non-destructive testing (X-ray, UT, MT, PT) to ensure compliance with ASTM, EN, DIN, and JIS standards. Statistical process control (SPC), capability studies (Cp/Cpk), and traceable production records enable Mulan Group to maintain low defect rates and high yields. Of course, more importantly, Mulan Group boasts a dedicated moldmaking team comprised of professional engineers with over 20 years of experience. This team ensures product consistency and stable production. Stability also translates to supply reliability—shorter lead times, predictable delivery, and scalable production from small to large batches. Mulan Group’s factories are ISO 9001, IATF 16949, PED, and other certifications, ensuring that every casting solution—whether made of steel, iron, aluminum, or specialty alloys—meets international quality standards. Combining multi-process expertise with stable and reliable manufacturing processes, Mulan Group provides durable, cost-effective, and long-term trusted castings to global industries such as automotive, energy, machinery, valves, and aerospace.
Reliable full-process quality inspection capabilities
To ensure that every casting product meets the consistency requirements of international customers for high precision and high reliability, we have established a comprehensive and sound testing process system, covering the entire process nodes of incoming materials, casting, machining, surface treatment and shipment. The testing standards are based on international standards (such as ISO, IATF 16949) and customer drawing requirements, covering key indicators such as size, tolerance, appearance, material, cleanliness and air tightness.
We ensure quality consistency through process execution – SOP operation instructions, standardized record forms and quality access control mechanisms are set up in the three key stages of first piece confirmation, process inspection and final inspection to ensure that each test is strictly implemented to avoid batch defects. At the same time, all test data are entered into the MES system in real time to support product-level quality traceability and review.
In terms of process effectiveness, we continue to carry out SPC analysis, defect trend identification and continuous improvement, improve the predictive ability and response speed of test results, and evaluate the process effectiveness through core indicators such as customer satisfaction, batch rejection rate, and first-time qualified delivery rate to ensure continuous optimization and stable operation of the quality system.
Strict quality control and traceability process, you don't have to take any risks
We strictly control the consistency of raw materials to ensure that the metal materials of each furnace are spectrally analyzed and correspond to the COA of the incoming materials, so that the source of each product can be accurately traced; our process parameters are automatically collected and monitored by the MES system throughout the process, and key data such as temperature, pressure, speed, etc. of each mold are recorded and available for inspection; once an abnormality occurs, we immediately start the closed-loop processing mechanism, from isolation, analysis to 8D improvement, each link has a basis to follow. It is this traceability capability that allows each of our die-casting parts to have an “identity”, “file”, and “responsibility”. We support 4 levels of traceability depth, batch level, furnace level, single-piece level, and process parameter level. Whether it is the automotive industry, medical device industry, or aerospace industry, we can meet the traceability requirements. Traceability = data-based trust, and what we want is trust, so we always do a good job of traceability.
With perfect industry certification, you can rest assured to cooperate
We strictly carry out customized processing according to the metal grades specified by customers (such as cast iron HT250, aluminum A356, stainless steel CF8M) and international standards (ASTM, DIN, JIS), and provide smelting composition analysis reports. For different casting processes, we will meet customers’ molding requirements for complex structures or thin-walled parts. Of course, you don’t have to worry about quality control, During the entire processing process, we will monitor the smelting temperature, pouring speed, and cooling time in real time, and our non-destructive testing (NDT) such as X-ray flaw detection and ultrasonic testing can achieve full inspection requirements. If you need it, we will provide material certification (MTC) and mechanical properties test reports. In addition, for customers in different countries, we support the provision of various certificate reports, such as: IATF 16949, PPAP, AS9100, ISO 13485, RoHS, REACH and ESG reports. Because our mission is to ensure “zero defect” delivery and establish long-term and stable cooperative relationships with more customers.
Our efficient business feedback
We let you see real-time progress on your entire order, from drawing to quote to sample production to full delivery, giving you peace of mind knowing we are a reliable custom metal casting supplier.
Look at Some Examples of Our Work-Corrosion resistant, high temperature resistant, wear resistant
Manufactured exactly according to your design
Custom wear-resistant castings
Custom duplex stainless steel castings
Custom stainless steel castings
Custom Copper castings
Custom ductile iron castings
Custom powder metallurgy parts
Custom Nickel, Cobalt-based alloys castings
Custom carbon steel castings
We can provide you with the following casting processes, of course, there are more
Sand Casting
Low cost mold | Highly complex shapes | Short delivery time and poor surface finish | Low dimensional accuracy
Sand casting is a very old and established process for manufacturing metal parts. Sand casting involves placing a bucket of molten metal material into a prepared sand mold. A sand mold is a cavity shaped like the desired product. After solidification, the molten metal takes the shape of the mold. Sand casting products are available in different shapes, sizes, and weights due to the process’s compatibility with complex designs. Moreover, the process is compatible with a wide range of metals and the use of sand makes it a cost-effective option.
- Ductile iron casting
- Gray iron casting
- Pump Casing
- Valve bodies
- Pipe connectors and joints
- Manhole covers
- Turbine blades
- Engine cylinder block
Investment Casting
Casting various non-ferrous and ferrous metal castings
Investment casting is one of the most frequently used casting methods in manufacturing. Because of its advantages such as high dimensional accuracy, smooth surface finish, complex design and fast production speed, etc., it has always been due to other casting methods. Of course, investment casting, also known as lost wax casting, utilizes a disposable pattern made of wax-like material to produce high-precision complex parts.
- Wind turbine blades
- Marine parts
- Engine components
- Prosthetics, implants and surgical equipment
- Automotive rockers
- Drivetrain components
Lost Foam Casting
High dimensional accuracy | High surface finish | highly-complex castings
Lost Foam Casting is an evaporative mold casting process that uses a foam model to create metal parts. The foam model is usually made of polystyrene (EPS), coated with a refractory material, and then embedded in sand. When the molten metal is poured into the mold, the foam evaporates, leaving a cavity filled with metal to form the final casting.
Similar to the sand casting method, lost foam casting uses sand to form a mold around the model. However, unlike other sand casting processes, lost foam casting does not require a sand binder. Instead, the model is placed in a steel box (or flask); loose sand is then poured into the flask and compacted around the model to form the mold. Of course, the main use of lost foam casting is still the manufacture of automotive parts.
- Cylinder head
- Engine block
- Cooling system
- Shell
- Differential shell
High pressure die casting
Semi-solid die casting | High vacuum die casting
High-pressure casting principle: High-pressure die casting (HPDC) refers to a casting process for producing metal products. The process principle is to melt the metal solution at high temperature and pour the molten metal liquid into the injection pipe of the die-casting machine through the hopper. The piston or plunger moves forward under the push of hydraulic pressure or pressurized gas. The molten metal liquid fills the die-casting mold cavity, and is formed and solidified under the action of pressure to obtain a casting. Then the die-casting machine opens the high-pressure die-casting mold under the action of the oil cylinder, and the aluminum die-casting is taken out. This process is called high-pressure die-casting.
High-pressure die casting can produce various aluminum and magnesium structural parts:
- Engine block
- Gearbox housing
- Oil pan
- Engine bracket
Metal grades for die casting：
- Aluminum alloy die-casting grades: A380\ADC12\A360\A390
- Zinc alloy die-casting grades: Zamak 3\Zamak 5\ZA-8\Zamak 7
- Magnesium alloy die-casting grades: AZ91D\AM60B
Centrifugal Casting
Thin-walled cylindrical products
Centrifugal casting is a high-strength metal casting process that uses a rotating mold to produce cylindrical products, such as pipes. In this process, molten metal is poured into a rotating mold. As the metal flows into the rotating mold, centrifugal force distributes it evenly over the inner diameter of the mold. By adjusting the amount of metal poured into the cylinder, the thickness of the casting can be precisely controlled. The liquid metal cools and solidifies into a complete metal product starting from the outer surface in contact with the cylinder.
- Pipes
- Tubes
- Ball bearings
- Wheels
Gravity casting
High product density | Long mold life | High dimensional accuracy
Gravity casting is a metal mold casting process that relies on the molten metal’s own weight for stable filling, resulting in fewer shrinkage defects and a denser structure. It is suitable for medium-volume production and components requiring uniform wall thickness and good mechanical strength. Key features include long mold life, consistent dimensions, and better performance compared with sand casting.
- Automotive wheels
- Engine housings
- Hydraulic valve bodies
- Motor housings
- Lighting enclosures
Data comparison of different casting processes
| Casting process | Tolerance (CT grade) | Minimum wall thickness Part | complexity | Typical part size | Suitable for mass production | Main application industries |
| High-pressure die casting | CT4-6 (high precision) | 0.5-1.5 mm | Medium-high (limited by mold) | Small-medium (<50 kg) | Very suitable for | Automobiles, 3C electronics, home appliances |
| Sand casting | CT8-12 (low precision) | 3-5 mm | Medium (simple to medium) | Small-very large (unlimited) | Medium | Machinery, energy, shipbuilding, construction |
| Investment casting | CT4-6 (extremely high precision) | 0.3-1.0 mm | Extremely high (complex inner cavity) | Small-medium (<100 kg) | Not suitable for (small batch) | Aerospace, medical, jewelry, military |
| Lost foam casting | CT6-8 (medium precision) | 2-3 mm | High (need to consider exhaust) | Medium-large (<10 tons) | Medium | Automobiles, pumps and valves, engineering machinery |
| Centrifugal casting | CT7-9 (medium precision) | 3-10 mm | Extremely low (axisymmetric parts) | Medium-large (tubular parts) | Medium | Pipes, bearings, cylinder liners, chemical containers |
- High-precision, complex small parts → [investment casting]
- Large-volume, Complex cavity parts\thin-walled aluminium parts → [high-pressure die casting]
- Large, low-cost → [sand casting]
- Complex medium and large parts → [lost foam casting]
- Axisymmetric tubular parts → [centrifugal casting]
Our factory production video
Advantages of Casting services with Mulan Group
Rapid Turnaround
The process from design and tooling to samples can be completed within 2–3 weeks, with mass production ready for delivery in the subsequent 4–8 weeks.
Endless Options
Several different materials for dozens of combinations of finishes, tolerances and markings. We also offer material certifications, inspections and measurement reports.
Serial Production
Consistent quality in mass production.
Quality control
Strict in-house QC to ensure your parts are flawless.
Are you trading company or manufacturer ?
We are original manufacturers, and of course, we also provide trade services. Because we have the qualifications for export trade.
Is material certification provided?
All raw materials come with MTC (material report), and of course we also support third-party testing (SGS/BV). Don’t worry about this
What are your trading methods?
EXW、FOB、CFR、CIF、FCA、DDU、DDP
How about your delivery time?
Mold Design: 2–5 days
Tooling: 8–10 days
Samples: 3–5 days
Mass Production: 4–8 weeks, Special customized products may require a few days earlier or later depending on the quantity and processing complexity.
Does the quotation include mold fees, freight and tariffs?
We will provide itemized quotations (such as mold fees, unit costs, and logistics costs) according to customer requirements.
Will the OEM products be sold to the third party?
Without the authorization of the customer, we will never do this, so we support the signing of NDA agreement to ensure your interests.
Contact US
We will be happy to help you with your casting, extrusion and forming work on a wide range of metals.
Head Quarter：Building 37, 2049 Pujin Road, Shanghai
E-mail：mulanmetal@mulan-mfg.com
Business Talk：+86-21-3479-1662
- Original Manufacturer
- 12+ years of custom casting manufacturing
- ISO 9001:2015 quality standard certified
- Free 2D/3D Design Drawing