P355NH steel grade is a normalized, weldable fine grain steels for pressure purposed. The dimensions and tolerance on dimensions should be according to EN 10028-1.
A pressure vessel steel grade with good weldability and high resistance to brittle cracking, P355NH steel is used by the world's fabricators for the manufacture of pressure vessel tanks for the storage of pressurised gases.
Other grade types include...
•P355NL1 – is ideal for use in low temperatures
•P355NL2 – is ideal for use in especially low temperatures
P355NH steel Chemical composition cast analysis
|
Element |
P355NH Max % |
Element |
P355NH max % |
|
C |
0.18 |
Cr |
0.30 |
|
Si |
0.50 |
Cu |
0.30 |
|
Mn |
1.10-1.70 |
Mo |
0.08 |
|
P |
0.025 |
Nb |
0.050 |
|
S |
0.015 |
Ni |
0.50 |
|
AL |
0.020 |
Ti |
0.03 |
|
N |
0.012 |
V |
0.01 |
P355NH steel Mechanical properties, Longitudinal min impact energy
|
Grade |
Type |
Thickness |
Yield Strength |
Tensile Strength |
Elongation |
Impact Energy |
|
(mm) |
MPa (min) |
MPa |
% (min) |
(KV J) (min) |
||
|
|
|
|
|
-20 degree |
||
|
P355NH |
Normalized |
≤ 16 |
355 |
490-630 |
22 |
30 |
|
16> to ≤40 |
345 |
490-630 |
22 |
30 |
||
|
40> to ≤60 |
335 |
490-630 |
22 |
30 |
||
|
60> to ≤100 |
315 |
470-610 |
21 |
30 |
||
|
100> to ≤150 |
305 |
460-600 |
21 |
30 |
||
|
150> to ≤250 |
295 |
450-590 |
21 |
30 |
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