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P355NL1 steel for pressure purposes steel plate

P355NL1 steel grade under EN 10028-3 standard is a normalized, weldable fine grain steels for pressure purposed. The P355NL1 plates dimensions and tolerance on dimensions should be according to EN 10028-1.

EN 10028-3 steel grades
Grade    P355NL1    P275NL1    P275NL2    P355N    p355nh
Grade    P355NL1    P355NL2    P460NH    P460NL1    P460NL2

With the minimum yield strength 355 Mpa, P355NL1 steel plate and sheets are mainly used for hot liquid pressure vessls and boilers in heavy industry. Pressure vessel steel plate P355NL1 should be under Normalized heat treatment and done low temperature impacting test at minus 40 centi degree,and pressure vessel steel sheet P355NH is at minus 20 centi degree,and else steel grade P355NH can used in elevated temperature surroundings.

For steel plates P355NL1 and P355NH,additional technical needs,such as HIC and UT is normally chosed to do by end users when enquiry and making orders.HIC test shall be done in accordance with EN 10229 specification. Carbon and low alloy steels may be susceptible to cracking when exposed to corrosive H2S containing environments, usually referred to as sour service.
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