Fine-grain structural steel for pressure vessels.
Good weldability and good cold and hot-rolling properties under normalised conditions.
Standard
EN10028-3
Identification Number
1.0565
Classification
–
Type
–
Rolling State
Normalised
Brief Description
Fine-grain structural steel for pressure vessels.
Good weldability and good cold and hot-rolling properties under normalised conditions.
Applications
Fine-grain, high-resistance structural steel for pressure vessels.
Standard Coil Stock Range
| P355NH | 1500 | 2000 |
|---|---|---|
| 3 | ● | |
| 4 | ● | |
| 5 | ● | ● |
| 6 | ● | ● |
| 8 | ● | ● |
| 10 | ● | ● |
| 12 | ● | ● |
| 15 | ● |
Chemical Composition
Regulatory standard
| Element | Value |
| C (%) | ≤ 0,18 |
| Si (%) | ≤ 0,50 |
| Mn (%) | 1,10-1,70 |
| P (%) | ≤ 0,025 |
| S (%) | ≤ 0,010 |
| AI (%) | ≥ 0,020 |
| Nb (%) | ≤ 0,05 |
| Ti (%) | ≤ 0,03 |
| V (%) | ≤ 0,10 |
| Mo (%) | ≤ 0,08 |
| Cu (%) | ≤ 0,30 |
| Element | Value |
| Cr (%) | ≤ 0,30 |
| Ni (%) | ≤ 0,50 |
| N (%) | ≤ 0,012 |
| B (%) | |
| Nb+Ti+V (%) | ≤ 0,12 |
| Cr+Mo+Ni (%) | |
| Ni+Cr+Cu+Mo (%) | |
| C.E.V. (%) | ≤ 0,43* |
* = for thicknesses in mm ≤ 60
C.E.V. (%) = C+(Mn/6)+[(Cr+Mo+V)/5]+[(Ni+Cu)/15]
Mechanical Properties
According to UNI EN 10028
| Mechanical characteristics | Direction | Thicknesses | Values |
| Re (MPa) | T | ≤ 16 | ≥ 355 |
| T | > 16 ≤ 40 | ≥ 345 | |
| Rm(MPa) | T | ≤ 16 | 490-630 |
| T | > 16 ≤ 40 | 490-630 | |
| A80 (%) | T | ≥ 16 | |
| A5 (%) | T | ≥ 22 | |
| Bend Test 180° | |||
| KV 20°C (J) | L | ≤ 250 | ≥ 75* |
| T | ≤ 250 | ≥ 50* | |
| KV 0°C (J) | L | ≤ 250 | ≥ 65* |
| T | ≤ 250 | ≥ 40* | |
| KV -20°C (J) | L | ≤ 250 | ≥ 45* |
| T | ≤ 250 | ≥ 30* | |
| KV -40°C (J) | |||
| KV -50°C (J) |
* = Standard option
t = thickness in mm of the test tube for the bend test
L = Tensile testing carried out on longitudinal test pieces
T = Bend tests carried out on cross-cut test pieces
Tolerances
Tolerances on the dimensions and on the shape UNI EN 10051
Surface condition UNI EN 10163-2
Certifications
EN 10204-3.1
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