EN 10028-3 Grade P355N

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Description

Steels for pressure vessels and boilers differ from other carbon-manganese structural steels due to their high resistance to pressure at all temperatures (ambient, low or high). The fundamental property of steels for pressure vessels is their ability to withstand high pressure at different temperatures. They have good weldability, as well as excellent toughness, and are suitable for normalisation annealing and stress-relief annealing (both treatments neutralise local hardening caused by welding).

Related Standards

This material data has been provided by ArcelorMittal.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

Dimension

PropertyValue

Dimensions

For Pickled products, please contact the supplier. Please feel free to check the figure on the right side of the material page for more details.

Mechanical

PropertyTemperatureValueComment

Charpy impact energy

-20 °C

30 J

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min. | for thickness 6-16 mm | Transverse

-20 °C

45 J

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min. | for thickness 6-16 mm

0 °C

40 J

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min. | for thickness 6-16 mm | Transverse

0 °C

65 J

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min. | for thickness 6-16 mm

20 °C

50 J

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min. | for thickness 6-16 mm | Transverse

20 °C

75 J

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min. | for thickness 6-16 mm

Elongation

18 %

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min. | for thickness 1.7-3 mm | Transverse, A80

22 %

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min. A5.65√So | for thickness 3-16 mm | Transverse

Tensile strength

490 - 630 MPa

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for thickness 1.7-16 mm | Transverse

Yield strength

355 MPa

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min. | for thickness 1.7-16 mm | Transverse

Chemical properties

PropertyValueComment

Aluminium

0.02 %

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min.

Carbon

0.18 %

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max.

Chromium

0.3 %

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max.

Copper

0.3 %

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max.

Manganese

1.1 - 1.7 %

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Molybdenum

0.08 %

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max.

Nickel

0.5 %

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max.

Niobium

0.05 %

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max.

Nitrogen

0.012 %

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max.

Phosphorus

0.025 %

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max.

Silicon

0.5 %

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max.

Sulfur

0.01 %

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max.

Titanium

0.03 %

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max.

Vanadium

0.05 %

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max.

Technological properties

Property
Application areas

Steels for pressure vessels are mainly used to manufacture boilers, drums, pressure or steam piping, industrial thermal vessels and heat exchangers. These steels are suitable for mechanical forming and welding.

Chemical composition

Notes:

1. A ratio Al/N ≥ 2 shall be applied.

2. The sum of the percentages by mass of the three elements chromium, copper and molybdenum shall not exceed 0.45%.

3. The sum of the percentages by mass of the three elements niobium, titanium and vanadium shall not exceed 0.12%.

Other

Mechanical properties:

The minimum impact energy values specified apply, even if they are not to be verified in the case of product thicknesses < 6 mm. Where minimum impact energy values are specified for several temperatures, verification of the impact energy, unless otherwise agreed, shall be carried out at the temperature for which the value of 27 J is specified. Where the minimum impact energy value specified at the lowest temperature is higher than 27 J, this higher value shall be verified.