P355GH — elevated temperature pressure vessel steel. Max service 400 C. For boilers, pressure vessels and heat exchangers operating above P265GH limitations.
P355GH per EN 10028-2 (EN 1.0473). Higher strength pressure vessel steel than P265GH — Rm 490-630 MPa, min yield 355 MPa (t<=16 mm). Can be used to 400 C continuous service. Standard for boiler drums, pressure vessel shells, heat exchanger shells and piping systems where P265GH strength is insufficient. Per EN 13445 (Unfired Pressure Vessels).
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