About us

Company Profile

With 20 years of deep experience in the steel casting industry

BOPENG CASTING is an integrated manufacturing and trading enterprise specializing in the research, production, and export of heavy steel castings. With 20 years of deep experience in the steel casting industry, we have built extensive industry expertise, a mature production system, and strong technical advantages.
We specialize in manufacturing various steel castings weighing up to 150 tons, with material options including carbon steel, manganese steel, low-alloy steel, stainless steel, and more. Customized production is available according to customers’ drawings and technical requirements.

application fields

Our products are widely used in global heavy industries, including

Building Materials Industry
Metallurgical Industry
Mining Industry
Forging Industry
Hydropower Engineering
Energy Industry
Shipbuilding Industry
BOPENG CASTING always adheres to quality as the core principle and customer needs as the driving force, committed to providing high-quality and reliable heavy steel casting solutions for customers worldwide.

Manufacturing Capabilities

  • Strong Production Capacity

    Annual output exceeds 35,000 tons of high-quality steel castings, ensuring stable large-scale delivery capability.

  • Extensive Product Range

    We manufacture more than 100 types of heavy steel castings, including gears, tyres, support rollers, slag pots, bearing housings, frames, end covers, and more, widely used in various heavy industrial equipment.

  • Diverse Material Options

    Main material grades include ZG310-570, ZG42CrMo, ZG45CrMo, ZG32CrNiMo, ZG40CrNiMo, with customized material solutions available according to working conditions and customer requirements.

Production Advantages

Strong Technological Innovation

Holding 4 invention patents, more than 30 utility model patents, and 4 certified scientific achievements, continuously driving product upgrades and process innovation.

Comprehensive Quality Management System

Certified with ISO9001、ISO14001、ISO45001 Quality Management System, Occupational Health & Safety Management System, Environmental Management System, as well as CE certification, ensuring product quality and standardized production.

Recognized Qualifications and Honors

Awarded titles such as National High-Tech Enterprise, Henan Specialized and Sophisticated SME, and Henan Science & Technology Enterprise.

Advanced Testing & Simulation Equipment

Equipped with advanced facilities including Huazhu CAE simulation system, SimCast casting simulation software, German OBLF GS1000 direct-reading spectrometer, touch-screen magnetic particle flaw detector, and ultrasonic flaw detector, providing strong support for product development, quality control, and inspection.

Serving the Global Market

We have served more than 2,000 customers worldwide, accumulating extensive international cooperation experience in the field of heavy steel castings. We have successfully provided high-quality steel casting products and professional services to many well-known domestic and international enterprises, earning broad recognition and long-term trust.

Major Customers Include

International Leading Companies
Leading Chinese Enterprises
One-stop Custom Castings

Why choose BOPENG CASTING?

Get a Solution

Over 20 years of casting experience

Mature processes, stable craftsmanship, and a well-established quality system.

One-stop service capability

Full-process service from pattern making, melting, molding, finishing, inspection to delivery.

24/7 engineering support

Quick response from engineers with both remote and on-site technical assistance.

Flexible cooperation models

Custom manufacturing based on drawings, supporting small batches, multiple product types, and high-standard requirements.

Patent & Qualifications

Honor Certificate

FAQ

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Steel casting and steel forging are two different manufacturing processes used to produce high-strength steel components, but they create different material structures and design advantages.
Steel forging forms metal through mechanical deformation under high pressure, which improves grain flow and is often selected for parts requiring extremely high fatigue resistance and directional strength. Steel casting, on the other hand, produces components by pouring molten steel into a precisely designed mold, allowing manufacturers to create complex geometries, large structures, and integrated components that would be difficult or impossible to manufacture through forging.
For many heavy industrial applications, steel casting provides significant advantages because it allows complex shapes, internal passages, thick sections, and customized designs while maintaining excellent strength, toughness, and wear resistance. This makes cast steel widely used for mining machinery, construction equipment, railway components, pump bodies, valve components, and power generation equipment.
The selection between casting and forging depends on factors such as component size, structural complexity, mechanical requirements, production volume, and operating environment. A professional steel casting manufacturer can help determine the most suitable process according to the actual application requirements.

Choosing the correct steel grade is one of the most important steps in designing a reliable steel casting component. The ideal material depends not only on strength requirements but also on the working environment, temperature, corrosion exposure, impact loads, and wear conditions.
Carbon steel castings are commonly selected for general industrial applications where good strength, machinability, and cost efficiency are required. Alloy steel castings are preferred for more demanding conditions because alloying elements such as chromium, nickel, molybdenum, and manganese can improve hardness, toughness, heat resistance, and wear performance.
For example, mining equipment components often require high impact resistance and abrasion resistance, while valve bodies and pump components used in energy or chemical industries may require corrosion resistance and high-temperature stability.
During material selection, engineers usually consider mechanical properties such as tensile strength, yield strength, elongation, hardness, impact toughness, and heat treatment requirements. A properly selected steel grade ensures that the casting performs reliably throughout its service life rather than simply meeting initial specifications.

Mining and heavy construction equipment operate under some of the most severe working conditions, including heavy impact, continuous vibration, abrasive materials, and extreme loading cycles. These environments require components with exceptional strength and durability.
Steel castings are widely used in these industries because they provide an excellent balance of mechanical strength, impact resistance, and design flexibility. Components such as crusher parts, excavator components, structural brackets, machine frames, and wear-resistant parts can be manufactured with complex shapes while maintaining high load-bearing capability.
Compared with other materials, steel castings can be engineered with specific alloy compositions and heat treatments to achieve improved hardness, toughness, and fatigue resistance. This makes them suitable for equipment that must operate continuously in mines, quarries, and heavy industrial environments.
The ability to produce large and complex components is another important advantage of steel casting, especially for heavy machinery where welded assemblies may introduce additional stress concentration points.

Steel casting quality depends heavily on controlling the entire manufacturing process, from melting and mold preparation to pouring, solidification, and heat treatment.
Common casting defects may include shrinkage cavities, gas porosity, inclusions, cracks, and dimensional variations. These issues usually result from factors such as improper molten steel treatment, incorrect pouring temperature, poor feeding design, uncontrolled cooling rates, or inadequate process parameters.
Professional foundries use multiple methods to reduce casting defects, including chemical composition control, simulation-assisted mold design, riser optimization, advanced melting technology, and strict inspection procedures.
Quality verification may include visual inspection, dimensional measurement, ultrasonic testing, magnetic particle testing, radiographic testing, and mechanical property testing. These inspection methods help ensure that steel castings meet customer specifications and perform safely in demanding industrial applications.

Heat treatment plays a critical role in improving the mechanical properties and long-term reliability of steel castings.
After casting, the internal structure of steel may contain residual stress and uneven microstructures caused by the cooling process. Heat treatment processes such as normalizing, annealing, quenching, and tempering help refine the grain structure, relieve internal stress, and achieve the required combination of strength, hardness, and toughness.
For heavy-duty applications, heat-treated alloy steel castings can provide significantly improved resistance against impact loads, fatigue failure, and mechanical deformation. For example, components used in mining machinery, railway equipment, and industrial processing systems often rely on carefully controlled heat treatment to achieve stable performance under continuous operation.
The correct heat treatment process depends on the steel grade, casting size, wall thickness, and final application requirements.

Custom steel castings are used across many industries where components require high strength, durability, and complex geometries.
Major application areas include mining equipment, construction machinery, oil and gas systems, power generation equipment, railway transportation, marine engineering, industrial pumps and valves, and heavy manufacturing machinery.
In the mining sector, steel castings are commonly used for wear-resistant and load-bearing components. In oil and gas applications, cast steel components are selected for their ability to withstand pressure, temperature variations, and harsh operating environments. Power generation and energy industries also rely on steel castings for critical equipment requiring high reliability.
Because steel casting allows manufacturers to create large, complex, and customized components, it remains an important manufacturing solution for industries requiring performance beyond standard fabricated parts.

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