EN 10305-1 E355 Cold-Drawn Hydraulic Cylinder Honed Tube

EN 10305-1 E355 Cold-Drawn Hydraulic Cylinder Honed Tube

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Payment Type:	D/P,T/T,L/C
Incoterm:	FOB,CFR,CIF,EXW
Transportation:	Ocean,Land,Express
Port:	Tianjin,Qingdao,Shanghai

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Product Description

Product Attributes

Model No.: En 10305-1 E355

Standard: Din, Gb, Astm

Material: Cr-Mo Alloy, St35-St52, Crni Alloy, Mn-V Alloy, 10#-45#, Q195-Q345

Section Shape: Round

Place Of Origin: China

Application: Fluid Pipe, Boiler Pipe, Structure Pipe, Hydraulic Pipe

Production Process: Cold Drawn

Certification: Ce

Special Tube: Thick Wall Pipe

Whether Alloy: Is Alloy

Tolerance: ±1%

Category: Seamless Steel Pipe

Processing Service: Cutting, Punching, Decoiling, Bending

Packaging & Delivery

Selling Units	:	Ton
Package Type	:	Standard marine packaging, or as required by the customer
Picture Example	:

Honed Steel Tube

ASTM A53 A106 Round Carbon Seamless Steel Pipe

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Product Description

EN 10305-1 seamless precision steel tube

EN 10305-1 seamless precision steel tube is a European standard for seamless cold-drawn precision steel tubes.

EN 10305 seamless precision steel tube shall be manufactured from hot finished seamless tubes by cold drowning. Other suitable methods of cold working are permitted. The tubes shall be delivered in the delivery condition +N which means that after the final cold drawing operation the tubes are normalized in a controlled atmosphere.

Standard and Steel grade:

EN10305-1 E215
EN10305-1 E235
EN10305-1 E355

E355 Seamless Pipe

The allowed pressure rates and temperatures are the responsibility of the customer in accordance with the state of the art and in application of the safety coefficients specified in the application regulations, codes or standards.

Tubes according to this EN 10305 European standard are characterised by having precisely defined tolerances on dimensions and a specified surface roughness.

EN 10305 seamless precision steel tube shall be manufactured from hot finished seamless tubes by cold drawning. Other suitable methods of cold working are permitted. The tubes shall be delivered in the delivery condition +N which means that after the final cold drawing operation the tubes are normalized in a controlled atmosphere.

NBK means protective heat-treating under the non-oxidation enviroment to get a bright and smooth surface for the tubes.

Chemical Composition (%) of EN 10305-1

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

Mechanical and technological properties of EN 10305-1

Yield strength (min Mpa)	Tensile strength (min Mpa)	Elongation (min %)
215	290-430	30
235	340-480	25
355	490-630	22

Condition on delivery of EN 10305-1:

Term	Symbol	Explanation
Cold-finished/hard (cold-finished as-drawn)	BK	No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft (lightly cold-worked)	BKW	After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed	GBK	After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized	NBK	The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.

Note:

The yield point for the annealed (GBK)condition on delivery is at least 50% of the (ultimate) tensile strength. Depending upon the degree of deformation in the drawing operation, the yield point of tubes delivered in the cold-finished/hard (BK)and cold-finished/soft(BKW) conditions, may be increased to a level close to the tensile strength.
In calculating the yield point, the following values are recommended : cold-finished/hard condition on delivery ≥ 80% of the tensile strength, cold-finished/soft condition on delivery ≥ 70% of the tensile strength.

Quality grade of EN 10305-1

The tubes are supplied in the following quality grades :

precision steel tubes intended primarily for mechanical stressing, without any particular quality requirement and without acceptance test certificate.
precision steel tubes intended primarily for mechanical stressing, with special quirement and exclusively with acceptance test certificate.
precision steel tubes with special requirement according to section 12.

Theses requirements and corresponding tests must be agreed, with the customer having to specify his requirements at the time of enquiry and on ordering.

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