This British Standard specifies the technical delivery requirements for weldable weather resistant steels for general structural and engineering purposes in the form of hot finished hollow sections of circular, square or rectangular form. It also applies to hollow sections formed hot with or without subsequent heat treatment or formed cold with subsequent heat treatment to obtain equivalent metallurgical conditions to those obtained in the hot formed product. However, in the case of hollow sections formed from plate and with the seams metal arc welded, this standard covers only the requirements for the plate material. The products are equally suitable for bolted and riveted structures. The products specified in this British Standard are intended for use in construction. Requirements for tolerances, dimensions and sectional properties are specified in BS EN 10210-2.
NOTE Two material grades are specified in this standard and the user should select the grade appropriate to the intended use and service conditions. The grades and mechanical properties are compatible with those in BS EN 10155.
This British Standard does not apply to products covered by BS EN 10025, BS EN 10113 (all parts), BS EN 10155, BS EN 10210-1, BS EN 10219-1, BS EN 10219-2 and BS EN 10225.
In addition to the definitive requirements, this standard also requires the items detailed in Clause 4 to be documented. For compliance with this standard, both the definitive requirements and the documented items have to be satisfied.