Thick-walled, straight-cylinder forged blanks are critical foundation components for manufacturing heavy-duty equipment such as high-pressure vessels and nuclear island components. They are typically produced using a solid forging process to ensure the density of the material microstructure and the reliability of performance. These forgings are usually highly customized, with their specific material, dimensions, and performance requirements determined by the end application.
Common Materials and Grades
The selection of materials depends on the operating environment (e.g., temperature, pressure, and medium) and the required mechanical properties. The main categories and typical applications are as follows:
Carbon Steel: Complies with standards such as GB/T 1591 Relatively low cost; suitable for pressure vessels and structural components requiring general strength.
Alloy Structural Steel: Complies with standards such as JB/T 6396 and NB/T 47008; examples include 42CrMo4 Excellent overall mechanical properties with a good balance of strength and toughness; a common choice for components in construction machinery, petroleum machinery, and similar applications.
Stainless Steel: Complies with standards such as NB/T 47010 Offers excellent corrosion resistance and is used in fields such as chemical engineering and marine engineering.
High-Alloy Heat-Resistant Steel: GB/T 41982-2022 standard Specifically designed for power plants, used to manufacture thick-walled pipes and forgings for high-temperature, high-pressure environments.
Dimension Range
The dimension range for large cylindrical forgings is:
Diameter: ≥ 3500 mm
Height: 1500 mm – 3000 mm
Weight: 25 metric tons to 200 metric tons
Extra-large thick-walled cylinders: In certain specific technical applications, dimensions far exceed the above standards:
Diameter: Can exceed 4,000 mm
Wall thickness: > 80 mm
General-purpose thick-walled forgings: Some manufacturers’ production capabilities cover a wide range of forgings, from 100 mm to 6,000 mm in diameter.
Application Areas
Thick-walled straight-cylinder forging blanks are core components of many major pieces of technical equipment, and their application areas are highly concentrated:
Energy and Power: Used in the manufacture of nuclear reactor pressure vessel cylinders and thick-walled pipes made of high-alloy heat-resistant steel for power plants.
Petrochemicals: Used in the manufacture of core equipment such as hydrogenation reactors and pressure vessels.
Heavy Machinery: Used in heavy-duty equipment such as construction machinery and concrete pipe pile molds.
We also provide forging blanks and CNC precision machining services for our clients, covering industries such as energy, petrochemicals, steel, engineering machinery, plastics, prevention and control, hydraulics, healthcare, and food. Please feel free to send us drawings for inquiries.
Metalworking Services
CNC Machining
Sheet Metal Fabrication
Metal Welding
Metal Cutting
Metal Bending
Metal Punching
Metal Forging
Metal Sheet Rolling
Tube and Plate Drilling
Our heavy-duty forging presses support open-die forging and deformation of large-section forgings, including discs, shafts, blocks, and custom components. This capability enables us to meet the demanding forming requirements of heavy industrial applications.
Heat treatment is a critical step in achieving the mechanical properties required for heavy-duty forgings. Our process capabilities meet the strength, toughness, and structural stability requirements for forged components used under demanding operating conditions.
We offer machining capabilities for large forged shafts and long cylindrical components, supporting both rough and finish machining. This capacity is suitable for stepped shafts, rotor shafts, rollers, and other heavy-duty forged shaft components.
Our machining facilities are capable of handling large ring-shaped forgings and circular parts that require precise turning, face machining, boring, and contour control. This capability is suitable for industrial ring blanks, heavy-duty circular parts, and machined ring forgings.
We offer machining solutions for heavy-duty cylindrical, hollow, and tubular forgings. This capability supports the machining of sleeves, cylinders, and other thick-walled forged components used in pressure vessels, rotating systems, and general industrial applications.
Quality control is integrated into our production process through the inspection and testing of forged and machined parts. Our capabilities help verify the dimensional accuracy, condition, and quality consistency of industrial forgings prior to delivery.
Finished forgings are properly protected and packaged to minimize the risk of damage during storage and transportation. Our packaging methods ensure the safe domestic delivery and export shipment of machined and high-value forged components.
