Boiler steels or steels for use under pressure (a.k.a. pressure vessel steel) can be classified as alloyed and unalloyed.
Sidertaglio Lamiere srl mainly deals with non-alloy steel for boilers according to EN10028, Asme and Astm.
The sheets are produced with the chemical composition and mechanical characteristics required by the various most important bodies in the world and can have even more certifications. A P355NH grade can have the certificate according to EN10028 also as P355NL2, or following the Asme as SA 516 GR 70 or Astm A 516 GR 70.
They are fine grain steels, quenched that are used both from coil and from quarto rolling , very weldable and with perfect mechanical characteristics for the construction of pressure vessels such as boilers or heat exchangers, tanks, penstocks. In the petrochemical industry in the form of pipes and fittings.
They are steels normally accompanied by the complete certification of the producer 3.1 but can often be subject to further checks by authorized bodies (certification 3.2) or supplementary tests as PED or AD2000. The company deals with the marketing of whole sheets or part of them and the cutting of details according to design.