BS/EN 10025-4-2019 pdf download.Hot rolled products of structural steels Part 4: Technical delivery conditions for thermomechanical rolled weldable fine grain structural steels.
7.4.3 Hot-dip zinc-coating
EN ISO 1461 should be used to specify coating requirements. EN ISO 147 13-2 provides further guidance, including information on the influence of various factors, including steel chemical composition, on the coating formation.
Option 5. Clause 13. can be used to order steels with a chemical composition required for hot-dip zinc coating. When option 5 is implemented, the purchaser and manufacturer shall agree to a steel composition (heat analysis) of silicon and phosphorous according to either Category A (or steels satisfying the formula Si ≤ 0,03% and Si+2,SP≤ 0.09%) or Category B (limited to 0.14% ≤ Si ≤ 0.25 %) or Category D (limited to 0,25 % <Si ≤ 0.35 %) with required values as cited by the ranges given in EN ISO 14713-2:2009, Table 1, column 2.
NOTE EN ISO 14713-2:2009. Table 1. gives guidance on typical coating characteristics associated with certain steel compositions on the basis of the surface composition of silicon and phosphorous.
The maximum carbon equivalent shall be increased by 0,02 or by 0,01 (see 7.2.4).
In some cases steels above S460 may be sensitive to cracking during galvanizing and therefore special care should be taken.
See Option 5. Clause 13 (Chemical composition for hot dip zinc coating).
7.5 Surface properties
7.5.1 StrIp
The surface condition should not impair an application appropriate to the steel grade if adequate processing of the strip is applied.
7.5.2 Plates and wide flats
EN 10163-1 and EN 10163-2 shall apply for the permissible surface discontinuities and for the repair of surface defects by grinding and/or welding. Class A. subclass 1 of EN 10163-2 shall apply, class B regarding grinding or subclasses 2 or 3 regarding repair by welding can be agreed upon at the time of the order.
See Option 15, Clause 13 (Other surface class for plates and wide flats).
7.5.3 Sections
EN 10163-1 and EN 10163-3 shall apply for the permissible surface discontinuities and for the repair of surface defects by grinding and/or welding. Class C, subclass I of EN 10 163-3 shall apply. Class D regarding grinding or subclasses 2 or 3 regarding repair by welding can be agreed upon at the time of the order.
See Option 16, Clause 13 (Other surface class for sections).
7.5.4 Bars and rods
7.7 Dimensions, tolerances on dimensions and shape, mass
7.7.1 Dimensions, tolerances on dimensions and shape shall be in accordance with the requirements
given in the order by reference to following standards: EN 10017, EN 10024, EN 10029. EN 10034, EN
10048, EN 10051, EN 10055. EN 10056-1, EN 10056-2, EN 10058, EN 10059, EN 10060, EN 10061, EN
10067, EN 10279. EN 10363 and EN 10365.
For hot rolled plate tolerances the basic requirements shall be in accordance with EN 10029, including thickness tolerances to class A. unless otherwise agreed upon at the time of the order.
See Option lB. Clause 13 (For plates other thickness tolerance than class A).
For plates cut from continuously hot rolled strip, the thickness tolerances shall be in accordance with EN 10051, unless otherwise agreed upon at the time of the order.
See Option 34, Clause 13 (For plates cut from strip thickness tolerances according to EN 10029).
7.7.2 The nominal mass shall be determined from the nominal dimensions using a volumetric mass of
7 850 kg/rn3.
8 Inspection
8.1 Type of inspection and inspection document
The products shall be delivered with specific inspection and testing to indicate compliance with the order and this document. The manufacturer shall obtain from the purchaser which of the inspection documents specified in EN 10204 is required.
NOTE Some application standards, eg. EN 1090-2, require particular inspection documents according to
EN 10204.
Unless otherwise agreed upon steel grades of this standard are delivered with CE marking and they shall not only fulfil these technical delivery conditions but also the requirements of EN 10025-1.
It can be agreed upon at the time of enquiry and order to abstain from CE-marking, see Option 33, Clause 13. in this case EN 10025-1 does not apply.
See Option 33, Clause 13 (no application of CE-marking).
8.2 Content of inspection document
The inspection document shall include, in accordance with EN 10168, the following codes and/or information, where applicable:BS/EN 10025-4-2019 pdf download.
BS/EN 10025-4-2019 pdf download
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