EN 10305-4 Precision Seamless Tube for Hydraulic and Pneumatic Systems

EN 10305-4 Precision Seamless Tube for Hydraulic and Pneumatic Systems

EN 10305-4 precision seamless tubes are essential components in hydraulic and pneumatic systems, renowned for their high precision, exceptional surface finish, and stringent dimensional tolerances. Manufactured to meet the rigorous demands of these systems, these tubes are designed to ensure efficient fluid power transmission, minimize leakage, and reduce pressure drops, making them indispensable in various industries such as automotive, aerospace, marine, and heavy machinery. The superior quality of EN 10305-4 tubes enables them to perform reliably in critical applications, including hydraulic cylinders, pneumatic actuators, and control systems, where durability and performance are paramount. Their consistent quality and performance make them a preferred choice for engineers and manufacturers seeking to optimize system efficiency and longevity.

Chemical Composition of EN 10305-4 Precision Seamless Tube for Hydraulic and Pneumatic Systems

Steel Grade	Steel Number	C max (%)	Si max (%)	Mn max (%)	P max (%)	S max (%)	Al (total) min (%)
E215	1.0212	0.10	0.05	0.70	0.025	0.025	0.025
E235	1.0308	0.17	0.35	1.20	0.025	0.025	0.015
E355	1.0580	0.22	0.55	1.60	0.025	0.025	–

Mechanical Properties of EN 10305-4 Precision Seamless Tube for Hydraulic and Pneumatic Systems

Steel Grade	Delivery Condition	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)
E215	BK	320-520	≥215	≥6
	BKW	290-450	≥195	≥12
	BKS	290-450	≥195	≥12
	GBK	290-430	≥185	≥30
	NBK	290-430	≥185	≥30
E235	BK	350-580	≥235	≥6
	BKW	315-490	≥215	≥12
	BKS	315-490	≥215	≥12
	GBK	315-450	≥195	≥25
	NBK	315-450	≥195	≥25
E355	BK	550-750	≥355	≥5
	BKW	510-710	≥335	≥8
	BKS	510-710	≥335	≥8
	GBK	490-630	≥315	≥20
	NBK	490-630	≥315	≥20

Specifications

Standard	EN 10305-4 Precision Seamless Tube for Hydraulic and Pneumatic Systems
Steel Grade/Material	E215, E235, E355
Outside Diameter (OD)	4 – 80mm
Wall Thickness (WT)	0.5 – 12.5mm
Length	500 – 10000mm
End	Plain Ends
Packing	Typically packed in protective wrapping, plastic end caps, and bundled with straps or placed in wooden or plastic crates, often palletized and labeled to ensure safe transportation and storage.
Section Shape	Round
Technique	Seamless Cold-Drawn
Place of Origin	Made in China
MOQ	3 Ton/Size
Transportation	Land transportation by truck or train, sea transportation by container ship or bulk ship.

Delivery Condition	Symbol	Description
As-drawn	BK	No heat treatment after last cold drawing pass
Cold-finished, soft	BKW	After last heat treatment, slight cold drawing
Annealed	GBK	After the final cold drawing process, the tubes are annealed in a controlled atmosphere
Stress-relieved	BKS	After the final cold drawing process, the tubes are stress-relieved in a controlled atmosphere
Normalized	NBK	After the final cold drawing operation, the tubes are normalized in a controlled atmosphere

Applications of EN 10305-4 Precision Seamless Tube for Hydraulic and Pneumatic Systems

Hydraulic Systems:

Hydraulic Cylinders: Used for converting fluid power into linear motion and force.
Hydraulic Lines: Serve as pipelines for transporting hydraulic fluids with minimal leakage and pressure drop.
Hydraulic Accumulators: Utilized for storing energy in the form of pressurized fluid.

Pneumatic Systems:

Pneumatic Cylinders: Act as the main body, converting compressed air into mechanical motion.
Pneumatic Actuators: Ensure accurate and smooth movement in mechanical operations.
Pneumatic Control Systems: Connect components for quick and efficient airflow with minimal pressure loss.

Automotive and Industrial Machinery:

Brake and Clutch Systems: Ensure reliable transmission of hydraulic pressure in automotive applications.
Heavy Machinery: Used in hydraulic systems for operating lifting, digging, and other heavy-duty functions.

Aerospace and Defense:

Landing Gear Systems: Operate hydraulic circuits for safe deployment and retraction.
Control Systems: Employed in control systems requiring precise fluid control.

Marine Applications:

Marine Engineering: Operate steering, anchor handling, and other vital marine equipment, resistant to corrosion and high pressure.

Medical Equipment:

Medical Devices: Used in ventilators and anesthesia machines for accurate and reliable fluid delivery.