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P490.20
Weldable structural steels
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“This specification covers requirements for 12 grades of structural steel available in the form of plates, sections and bars, and suitable for bolted, riveted or welded structures. NOTE 1 The standards referred to in this specification are listed in clause 2. NOTE 2 Requirements that must be specified by the purchaser and those that must or may be agreed upon between the manufacturer and the purchaser are listed in Annex A.
NOTE 3 The positions for taking test samples for tensile and bend tests are given in Annex B.
NOTE 4 The positions for taking test samples for impact resistance tests are given in Annex C.
NOTE 5 Guidance on the verification of the quality of weldable structural steels produced to this specification is given in Annex D.”