China Casting Manufacturers Suppliers Factory - Customized Casting Made in China

Your Professional Casting Supplier

Qingdao Hailong Machinery Group Co., Ltd., is a national high-tech manufacturer specializing in automotive dies, stamping parts, fixtures, jigs, vehicle cabs, truck bodies, and special vehicles. Our products are widely used in automotive OEM, heavy industry, and transport equipment markets across Europe, America, the Middle East, Japan, and South Korea.

Full In-House Production Chain

We cover the full process from mold design, stamping, welding, coating to final assembly, ensuring stable quality and delivery control.

Strong Engineering Capability

With experienced technicians and advanced R&D systems, we provide precise design, process optimization, and technical support for complex projects.

Advanced Equipment

We operate large CNC machines, stamping lines, laser cutting systems, and over 50 testing devices to ensure accuracy and product reliability.

Certified Quality System

We are certified with IATF 16949, ISO9001, ISO14001, and ISO45001, ensuring compliance with global automotive and industrial standards.

Fan Impeller Casting
Custom cast fan impellers in aluminum, ductile iron and steel. Die cast, lost foam and precision cast, CNC finished and balanced to your drawing.
Valve Body Fittings
Our cast valve body is manufactured by advanced metal casting technology, serving as the core housing component for industrial control valves. We support customized dimension, material and machining
Valve Body Parts
Our cast valve body is manufactured by advanced metal casting technology, serving as the core housing component for industrial control valves. We support customized dimension, material and machining
Centrifugal Pump Casing Parts
Centrifugal Pump Casing Parts | Premium Wear-Resistant & Corrosion-Resistant Pump Housing Components
Milling Machine Worktable
Professional cast iron machine tool base blanks & semi-finished bases for milling and grinding machines. We focus on integral cast iron base casting and OEM custom processing, supplying standard
Machine Columns
Our cast oil pump impeller is a core precision component for oil pump systems, manufactured with advanced sand casting and precision machining processes. Adopting high-quality materials like ductile
Machine Tool Bed Casting
Cast Iron Machine Tool Base | High Strength · Precision · Stable Performance. Core Position: Core bearing component designed for various machine tools, suitable for machining centers, milling
Oil Pump Impeller Blank
Our cast oil pump impeller is a core precision component for oil pump systems, manufactured with advanced sand casting and precision machining processes. Adopting high-quality materials like ductile
Machine Tool Bed
Cast Iron Machine Tool Base | High Strength · Precision · Stable Performance. Core Position: Core bearing component designed for various machine tools, suitable for machining centers, milling
Machine Tool Column
Casting Machine Tool Column | Heavy-duty Precision · High Rigidity · Industrial Adaptation. Core Position: A core structural component solution for CNC machine tools, machining centers, milling
Machine Tool Worktable
Cast Iron Machine Tool Worktable | High Precision · Strong Load-bearing · Wear Resistant. Core Position: Core bearing and machining reference component for machine tools, providing a stable platform
Centrifugal Pump Casing
Cast Centrifugal Pump Casing | Pressure-Resistant · Corrosion-Proof · High-Efficiency Flow Channel. Core Position: Core pressure-bearing component of centrifugal pumps, suitable for industrial water

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Specification

Material Type	HT250/HT300 Gray Cast Iron, QT450/QT500 Ductile Iron
Casting Process	Resin Sand Casting, Lost Foam Casting
Size Range	Height 1000-5000mm, Width 500-2000mm, Wall Thickness 15-50mm
Dimensional Accuracy	Grade CT8-CT10, Key Dimensional Tolerance ≤±0.01mm
Mechanical Properties	Tensile Strength ≥250MPa, Bending Strength ≥350MPa, Hardness HB180-240
Surface Quality	Roughness Ra≤1.6μm, Flaw Detection Standard UT/MT Level 2
Aging Treatment	Natural Aging 28 Days/Artificial Aging (200-300℃, 8-12 Hours)

Types of Casting

The casting produced by our company mainly include the following types:

Die Casting

Die casting is a manufacturing process that forces molten metal under high pressure into reusable steel molds (called dies) to produce complex, high-precision parts.

Sand Casting

Sand casting is a highly versatile metalworking process in which molten metal is poured into a mold cavity made of compacted sand.

Advantages of Casting over Forging

Lower Cost

Casting is generally less expensive than forging, primarily due to the fact that it requires less material and is a less complex process. In forging, a block of metal is heated and then shaped by applying pressure, often with the use of a die. This process can be time-consuming and requires a significant amount of energy. Casting, on the other hand, involves pouring molten metal into a mould and allowing it to cool and solidify.

Greater Design Flexibility

Casting also offers greater design flexibility than forging, as it allows for more intricate and complex shapes to be created. In forging, the metal is shaped primarily by the die, which limits the design options. Casting, however, allows for more intricate and detailed designs to be achieved, as the molten metal can flow into every nook and cranny of the mould.

Improved Surface Finish

Casting also typically results in a smoother and more polished surface finish than forging. In forging, the metal is compressed and stretched, which can cause surface imperfections such as cracks and blemishes. Casting, on the other hand, produces a smoother surface finish, as the molten metal fills the mould evenly and solidifies uniformly.

Reduced Waste

Casting also produces less waste than forging, as it allows for greater precision in the manufacturing process. In forging, the metal is shaped by the die, which can result in excess material being wasted. Casting, however, allows for more precise control over the amount of material used, which reduces waste and saves on costs.

Applications of Casting

Automotive

For the automotive industry castings are vital. Given the wide variety of castings they incorporate, passenger cars or trucks are inconceivable without them.

General Engineering

In general engineering in particular, the entire design of a machine is often dominated by cast components and relies upon innovation and advanced technology to meeting increasingly stringent requirements.

Agriculture Machines

Agriculture is the backbone of almost all world economies. But also an agricultural machine is incomplete without agricultural castings. Parts of iron steel and light metals serve as wheels, hubs and brake drums, hydraulics, engine and powertrain components etc.

Electrical Engineering

Like the mechanical engineering industry, electrical engineering covers a wide range of subsectors. Castings are used in power generation equipment such as, for example, transformers and generators, as well as in electric motors.

Medical Engineering

There is hardly a better example than the use of cast components for the medical sector to show how people are directly helped by castings.

Ship Building

Mobility on the high seas, whether it serves to transport cargo or passengers, is inseparably linked to castings made by foundries. Foundries produce large engines for ships of all sizes on a large scale and are largely responsible for energy efficiency on the oceans.

The Aerospace Industry

Castings, often produced by the investment casting process, are to be found in turbines and jet engines as well as in the fuselages, undercarriages and interior fittings of airplanes.

Energy and Renewable Energy

Renewables without castings is inconceivable. Castings are used in many aspects of the energy industry such as for pumps and valves for the oil and gas sector.

Railway Engineering

The transport of passengers as well as goods on land depends on the efficiency of rail engineering in all the regions of the world. To a large extent, it is due to castings that rail transport is one of the safest traffic infrastructures to be found anywhere.

Commonly Used Materials in Casting

Cast Iron

Good wear resistance and vibration damping

Carbon Steel

Strong and durable

Alloy Steel

Enhanced mechanical properties

Aluminum

Lightweight and corrosion-resistant

Brass & Bronze

Good machinability and corrosion resistance

Casting vs Forging

Feature	Casting	Forging
Process	Molten metal poured into mold	Solid metal shaped using force
Strength	Lower	Higher
Design Flexibility	High	Limited
Internal Defects	Possible (porosity, shrinkage)	Minimal
Best Use	Complex shapes	High-stress applications

Customizable Options

Size Customization

Support table customization of different length, width, thickness and surface area according to customer drawings

Material Customization

High-strength special cast iron (e.g., QT600) or alloy cast iron available for ultra-heavy load requirements

Structure Customization

Customize T-slot specifications/quantity, reserve mounting holes, optimize reinforcing rib layout

Process Customization

Optional special processes such as chrome plating and nitriding to enhance wear/corrosion resistance; support special-shaped table design

Packaging and Shipping

Packaging	Wrapped with anti - rust paper, bubble film, and packed in export cartons or wooden cases.
Shipping	Shipping by sea, by air, by express are acceptable. According to your requirements.

Our Factory

Our Certificates

IATF 16949, ISO9001, ENVIRONMENTAL MANAGEMENT SYSTEM CERTIFICATION, NSYSTEM CERTIFICATION

FAQ

Q: What file formats do you accept for product design?

A: We support STEP, IGES, DWG, DXF, SolidWorks, and Pro/E files. If you only have 2D drawings, our engineering team can convert them to 3D models for free.

Q: What is the minimum order quantity (MOQ) for your services?

A: The MOQ varies by process: 10pcs for casting/stamping, 5pcs for precision machining, and 1 set for mold making. We also offer prototype services with no minimum quantity (starting from 1pc).

Q: How long does it take to get a prototype and mass production?

A: Prototypes: 3-7 days (depending on complexity); Mass production: 15-45 days (including mold production if required). We can provide expedited services for urgent orders.

Q: Do you offer surface treatment and assembly services?

A: Yes, we provide a full range of surface treatments (anodizing, plating, painting, etc.) and assembly services (fastening, welding, adhesive bonding) to deliver ready-to-use finished products.

Q: How do you ensure product quality and traceability?

A: We implement a strict quality control system and each order comes with a detailed inspection report, including material composition, dimensional data, and performance test results

Qingdao Hailong Machinery Technology Co., Ltd. is one of the most experienced casting manufacturers and suppliers in China, also supports customized service. Please feel free to buy discount casting made in China here from our factory. Contact us for pricelist.