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Product Description
Yile Machinery is a premier manufacturer of custom, seamless forged cylinders and hollows. Produced through an advanced open-die forging and piercing process, our cylinders are engineered for demanding high-pressure and high-stress environments.
The forging process delivers a component with superior mechanical strength and fatigue resistance, making it the definitive choice for critical applications where welded or bored-from-bar cylinders are not sufficient.
Our manufacturing process is designed to create a monolithic, seamless cylinder with an optimal internal grain structure for pressure containment.
Heating & Upsetting: A solid billet of high-quality alloy steel is heated to the precise forging temperature. It is then "upset" in a hydraulic press to refine the grain and shape the initial preform.
Seamless Piercing & Drawing: The hot preform is pierced to create a hollow shape. It is then drawn over a mandrel to elongate the cylinder and achieve the desired internal diameter and wall thickness. This entire process ensures a continuous, uninterrupted grain flow that follows the cylinder's contour.
Heat Treatment (Quenching & Tempering): After forging, the cylinder undergoes a controlled heat treatment cycle. This crucial step develops the final mechanical properties, such as high tensile strength, toughness, and resistance to deformation under pressure.
Superior Strength: Forged and heat-treated alloy steel provides significantly higher tensile and yield strength compared to standard pipe or cast materials.
Seamless Integrity: The absence of welds eliminates potential weak points, ensuring reliable performance under cyclic loading and high internal pressure.
Enhanced Fatigue Life: The refined, continuous grain structure greatly improves resistance to fatigue cracking.
Custom Dimensions: The open-die forging process allows for flexible production of cylinders with large diameters, heavy wall thicknesses, and custom lengths to meet specific design requirements.
We forge cylinders from a range of certified high-strength steels to meet the most demanding specifications.
Material Grade | Equivalent / Type & Characteristics |
42CrMo | AISI 4140: A versatile Chromium-Molybdenum alloy steel with an excellent combination of high strength, toughness, and wear resistance after heat treatment. |
35CrMo | AISI 4135: Similar to 42CrMo but with slightly lower carbon content, offering good strength with improved weldability if needed for attachments. |
34CrNiMo6 | EN24 / 1.6582: A high-tensile Nickel-Chromium-Molybdenum steel used for highly stressed components requiring exceptional strength and toughness. |
Custom Alloys | We can source and forge other carbon and alloy steel grades based on your project's specific engineering requirements. |
Our seamless forged cylinders are essential components in:
Hydraulic Press Main Cylinders
Extrusion Press Containers and Liners
High-Pressure Accumulator Shells & Bottles
Heavy-Duty Hydraulic Cylinder Barrels
Pressure Vessels for the Chemical and Petrochemical Industry
Marine and Offshore Equipment
Get a Quote for Your Custom Forged Cylinder
As a specialized OEM manufacturer, we produce cylinders according to your exact specifications. Please send our engineering team your technical drawings, material grade, heat treatment requirements, and quantity to receive a formal quotation.
