BS EN 10305-3:2010 pdf free.Steel tubes for precision applications — Technical delivery conditions Welded cold sized tubes.
BS EN 10305-3 This European Standard specifies the technical delivery conditions for welded cold sized steel tubes of circular cross section for precision applications with specified outside diameter D S 193,7 mm.
NOTE  This document may also be applied to other types (excluding square and rectangular) of cross sectin.Tubes according to this document are characterized by having precisely defined tolerances on dimensions and a specified maximum surface roughness. Typical fields of application are in the vehicle, furniture and general engineering industries.
The following referenced documents are indispensable for the application of this document. For dated references，only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.The tubes, when supplied in a delivery condition indicated in Table 1 and inspected in accordance with
Clauses 9, 10 and 11, shall comply with the requirements of this document. In addition, the general technical delivery requirements specified in EN 10021 apply.The cast analysis reported by the steel producer shall apply and comply with the requirements of Table 2. A steel grade not specified in this document may be specified (see option 1).
Option 1: A steel grade not specified in this document with a maximum total content of alloying elements of 5 % and agreed chemical composition, mechanical properties and delivery condition, is specified.
NOTE When subsequently welding tubes produced in accordance with this document, account should be taken of the fact that the behaviour of the steel during and after welding is dependent not only on the steel composition and the delivery condition, but also on the conditions of preparing for and carrying out the welding. Option 2: The composition of the specified steel grade shall be such that it is suitable for hot-dip galvanizing
(see e.g. EN ISO 1461 for guidance).BS EN 10305-3 pdf download.