BS EN 10025-4:2019 pdf free

BS EN 10025-4:2019 pdf free.Hot rolled products of structural steels Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels.
For the purposes of this document, the terms and definitions given in EN 10079 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:/Jwww.eIectropdia.org/
— ISO Online browsing platform: available at hrrp:j/wwwiso.org/obp
3.1 thermomechanical rolling rolling process in which the final deformation is carried out in a certain temperature range leading to a material condition with certain properties which cannot be achieved or repeated by heat treatment alone
Note 1 to entry: Thermomechanical rolling can include processes with an increasing cooling rate with or without tempering including self-tempering but excluding direct quenching and quenching and tempering.
Note 2 to entry: In some publications the word TMCP (Thermomechanical Control Process) is also used.
3.2 fine grain steels steels with fine grain structure with an equivalent index of femtic grain size 6
Note Ito entry: Forthe determination of grain sizes see EN ISO 643.
4 Classification and designation
4.1 Classification
4.1.1 Main quality classes
All steel grades specified in this document shall be classified as alloy special steels according to EN 10020 except grade S275 which is a non-alloy quality steel.
4.1.2 Grades and qualities
This document specifies five steel grades S275. S355, S420, S460 and S500. All steel grades may be supplied In the following qualities as specified at the time of the order:
— with specified minimum values of impact energy at temperatures not lower than —20 °C, designated as M;
— with specified minimum values of impact energy at temperatures not lower than —50 °C. designated as ML.
4.2.1 For the steel grades covered by this document the steel names shall be allocated in accordance with EN 10027-1; the steel numbers shall be allocated in accordance with EN 10027-2.
4.2.2 The designation shall consist of
— number of this document (EN 10025.4);
— steel name or the steel number- the steel name consisting of:
— symbol S (for structural steel);
— indication of the minimum specified yield strength for thickness s 16mm expressed in MPa;
— delivery condition M;
— capital letter I for the quality with specified minimum values of impact energy at temperatures not lower than —50 °C.
EXAMPLE Thermomechanical rolled structural steel (S) with a specifIed minimum yield strength at room temperature of 355 MPa and with a specified minimum impact energy at —50 C:
EN 10025-4 – S35SML Or
EN 10025-4 – 18834
5 Information to be supplied by the purchaser
5.1 Mandatory information
The following information shall be supplied by the purchaser at the time of the order:
a) quantity to be delivered;
b) product form and the number of the standard for dimensions and tolerances(see 2.2);
c) nominal dimensions and tolerances on dimensions and shape (see 7.7.1);
d) steel designation (see 4.2.2);
e) additional requirements of inspection and testing and all required options (see 5.2 and Clause 13);
I) type of inspection document according to EN 10204 (see 8.1).BS EN 10025-4 pdf download.