Pressure vessel steel
P355QH / 1.0571 pressure vessel steel
P355QH is quenched and tempered pressure vessel steel. QH is a different route from normalised NH — same 355 class, different condition.
- Delivery conditions
- +N / +NT
- Also known as
- 1.0571, P355QH1
Designations
- W.Nr.
- 1.0571
- EN standard
- P355QH1
- Group
- Pressure vessel steel
What it is used for
Pressure plate where the drawing says QH rather than NH.
Limits
P355NH when EN 10028-3 +N is what the plant knows. P355QL1 when low temperature has to be included in the QT route.
Delivery
We source P355QH from European mill partners as plate, flat bar, round bar, cut to your dimensions and ship the certificate with the material. Typical condition: +N / +NT. Standard: P355QH1. From a single cut piece to larger lots — with no minimum charge, so you do not have to buy a full commercial length to get what you need.
Certificates and documentation
P355QH can be supplied with a material certificate to EN 10204, depending on producer, dimension and the requirements specified for the delivery. On pressure-bearing material the certificate is part of the product: standard, condition and tests must be on the enquiry, and 3.2 must be agreed before the material is locked at the mill. EN 10204 3.1 can be supplied on a wide range of our materials — 3.2 and third party by project, when the mill can issue it.
Dimension programme
| Form | Range | Note |
|---|---|---|
| Round bar | Bar to order | When the form is bar, not plate. |
| Plate | 6–80 mm thickness | PED and certificate govern the size — not a bar Ø. |
| Fittings | Ø12–Ø2000 mm | ASME 1/2–60″ (Ø15–Ø1524 mm). Type A and B. Not a stock statement. |
| Flanges | Ø14–Ø2000 mm | ASME 1/2–60″ (Ø15–Ø1524 mm). PN 6–400. Not a stock statement. |
The range is a delivery programme, not a stock statement. Length is cut to your drawing.
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Send your enquiry
State grade, dimensions and quantity — or attach a drawing. We reply with a quote.