Project Description

EN10305-1 E235 Seamless steel Tube

Standard: EN 10305-1

Materials:  E235(1.0308)

outside diameter:4-260mm

Wall thickness:0.5-25mm

Length:3m-9m or made to order.

Technical: cold-drawn seamless

Application: Automotive, Machining, etc

Steel Grade Chemical Components (%)
Steel Name Steel Number C












E215 1.0212 0.10 0.05 0.7 0.025 0.025 0.025
E235 1.0308 0.17 0.35 1.2 0.025 0.025 /
E355 1.058


0.55 1.6 0.025 0.025 /













EN10305-1 E235 Seamless steel Tube are supplied in the following quality grades :

1.precision steel tubes intended primarily for mechanical stressing, without any particular quality requirement and without acceptance test certificate.

2.precision steel tubes intended primarily for mechanical stressing, with special quirement and exclusively with acceptance test certificate.

3.precision steel tubes with special requirement according to section 12.

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


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.