Forged cylindrical parts are hollow cylindrical metal parts manufactured through forging processes. They possess high strength, high density, and excellent mechanical properties, and are widely used in mechanical, energy, aerospace, chemical, and other industrial fields.

Core Features

Geometric Shape: Hollow cylinder, which can have structures such as flanges, steps, and internal threaded holes.

Material Properties: Commonly used materials include carbon steel (such as 45# steel), alloy steel (such as 40Cr, 35CrMo), stainless steel (such as 304, 316L), aluminum alloy, titanium alloy, etc. Corrosion-resistant, high-temperature resistant, or high-strength materials are selected according to the application scenario.

Classification and Application Scenarios

1. Classification by Application Field

2. Classification by Process Characteristics

Seamless forged cylindrical parts: Formed directly through piercing and drawing processes, without welding seams, higher strength, suitable for high-pressure scenarios (such as hydraulic cylinders, nuclear power components).

Welded forged cylindrical parts: Welded from multiple forgings or plates, lower cost, suitable for large-size, non-high-pressure scenarios (such as large storage tanks, engineering machinery structural parts).

Key Process Description

Forging Process ：

Free forging: Suitable for small-batch, large-size cylindrical forgings, formed through manual or simple molds, high flexibility.

Die forging: Forged using special molds, high dimensional accuracy, good surface quality, suitable for mass production (such as bearing rings).

Heat Treatment ：

Improve comprehensive mechanical properties through tempering (quenching + high-temperature tempering), or eliminate internal stress through aging treatment to stabilize dimensions.

Detection Technology ：

Ultrasonic testing (UT) is used to detect internal defects, and magnetic particle testing (MT) is used to detect surface cracks to ensure the quality and safety of forgings.

Technical Advantages

Excellent Mechanical Properties ：The metal fiber flow lines are distributed along the contour of the part during forging, and the strength is increased by more than 30% compared to castings.

High Structural Reliability ：Seamless forgings avoid welding defects and are suitable for high-load, high-risk working conditions (such as pressure vessels).

Strong Customization Capability ：The size (diameter range from tens of millimeters to several meters), wall thickness, and end structure can be flexibly adjusted according to the drawing requirements.

Selection and Quality Standards

1. Selection Points

Operating conditions: Clarify the working pressure, temperature, medium (such as corrosive liquid), and load type (static load/dynamic load).

Dimensional accuracy: Select the tolerance grade (such as IT7-IT9 grade) according to the mating requirements. Precision machinery requires higher accuracy (such as aerospace components).

Material certification: Key fields (such as nuclear power, aviation) require material smelting reports (such as electroslag remelting), mechanical property test reports (tensile strength, yield strength, impact toughness, etc.).

2. Main Quality Standards

Domestic Standards ：

GB/T 15826 "Steel hammer forged parts"

JB/T 4726 "Forgings of carbon steel and alloy steel for pressure vessels"

International Standards ：

ASTM A105 (US standard forgings for pressure vessels)

EN 10250-3 (European standard forgings for general engineering)

Application Fields

Wind power industry	Shipbuilding	Mechanical Manufacturing
Nuclear power industry	Oilfield industry	Chemical industry