EN10305-4 E235 Seamless Precision Tubes for Hydraulic and Pneumatic Power Systems

 

These tubes are meticulously engineered to meet the exacting standards outlined in the European standard EN10305-4. Designed for use in hydraulic and pneumatic power systems, they play a crucial role in the manufacturing of systems belonging to the I generation, as well as being integral components in the pipelines of hydraulic and pneumatic systems.

 

 

1. Seamless Precision: Manufactured as seamless cold-drawn tubes, these products exhibit a high degree of precision and dimensional accuracy. The absence of welded seams enhances their reliability and performance in demanding applications.

 

2. Material Grade: The tubes are designated with the steel grade E235, indicating a specific composition and set of mechanical properties. This ensures the tubes meet the necessary strength and durability requirements.

 

3. Delivery Condition: Supplied in the +N delivery condition, the tubes undergo normalization in a controlled atmosphere. This heat treatment enhances the mechanical properties, contributing to the overall quality and performance of the tubes.

 

4. Versatile Delivery Status: Available in various delivery statuses including BK(+C), BKS(+SR), BKW(+LC), GBK(+A), and NBK(+N), providing flexibility to suit different application requirements.

 

5. Pressure and Temperature Considerations: The standard EN 10305-4 doesnt specify pressure ratings and upper temperatures. It is the responsibility of clients to determine these factors, applying safety coefficients as specified in relevant codes, regulations, or standards. For the low-temperature range, impact energy requirements are specified at 0°C.

EN10305-4 E235 Chemical Composition

EN10305-4 E235 Mechanical Properties 

Grade		Mechanical Properties
	+C		+LC		+SR			+A		+N
	Rm (Mpa) min	A % min	Rm (Mpa) min	A % min	Rm (Mpa) min	ReH (Mpa) min	A % min	Rm (Mpa) min	A % min	Rm (Mpa) min	ReH (Mpa) min	A % min
E215	430	8	380	12	380	280	16	280	30	290-340	215	30
E235	480	6	420	10	420	350	16	315	25	340-480	235	25
E355	640	4	580	7	580	450	10	450	22	490-630	355	22
1. Rm: tensile strength; ReH: yield strength; A: elongation 2. +C: Cold drawn/hard +LC: Cold drawn/soft +SR: Cold drawn and stress relieved +A: Annealed +N: Normalized

EN10305-4 specifies the technical delivery conditions for seamless cold-drawn precision steel tubes of circular cross-section used in hydraulic and pneumatic power systems. These precision tubes are manufactured from normalized, cold-drawn or cold-rolled steel with specified mechanical properties, including a minimum yield strength and elongation. E235 denotes a steel grade characterized by excellent weldability and machinability, ensuring suitability for various engineering applications. These tubes are typically produced with tight dimensional tolerances and smooth surface finishes to meet precise requirements in critical systems. They are commonly used in automotive, mechanical engineering, and other industrial sectors where precision and reliability are paramount.

EN10305-4 E235 seamless precision tubes