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Υψηλής αντοχής ERW ορθογώνια κοιλοδοκός σε S355J2H (παλαιότερα ST52 / St52-3). Ελάχιστο όριο διαρροής περίπου 355 MPa και εφελκυσμός τυπικά 490–630 MPa. Κοιλοδοκοί EN 10219. Συνήθεις διαστάσεις περίπου 20×40–200×300 mm, τοιχώματα περίπου 1,5–10 mm. Τυπικό μήκος 6 m. Για κατασκευές, δοκούς γερανών, πλαίσια μηχανών και βαριά κατασκευή.
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283 διαθέσιμα μεγέθη
ST52 rectangular hollow sections in S355J2H (EN 10219) give the same high-yield, −20 °C impact package as ST52 square box, with the directional stiffness of an RHS. Used for crane beams, long-span frames, and heavy machine chassis where S235 would need a larger section.
Match wall and outer size to the load case; the extra yield often lets you drop a wall thickness versus S235 at the same envelope. For furniture, conveyors, or tight-tolerance assembly, cold-rolled CR rectangular tube is the better surface and tolerance choice — it is not a structural S355 substitute.
6 m stock, quoted per length. Send A × B × wall, quantity, and destination in a quote request; mill certificates to EN 10204 3.1 on request.
S355J2H (ST52)
EN 10219
Χάλυβας
Κοιλοδοκός ορθογωνική S355J2H
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