P355NH steel grade is one of grade in En10028-3, which is non alloy and alloy steels with specified elevated temperature properties. P355NH grades are used above all for manufacturing boilers, pressure vessels and pipes transporting hot liquids.
Along with the P355NH steel plate, there are other boiler steels under EN10028-3, including P275NH boiler steel, P275NL1 steel, P275NL2 material, P355N boiler steel, P355NL1 boiler steel, P355NL2 steel, P460NH boiler steel, P460NL1 boiler steel, P460NL2 boiler steel.
According to the temperature environment, the classification of EN10028-3 vessel steel is as follows:
Normal temperature vessel steel grade: P355N steel plate.
Steel grade of high temperature resistant vessel: P355NH steel plate.
Low temperature quality grade: P355NL1 steel, P460NL1 steel plate.
Special low temperature quality grade: P355NL2 steel plate, P460NL2 steel plate.
|
P355NH Chemical Composition |
|||||||
|
Grade |
The Element Max (%) |
||||||
|
C |
Si |
Mn |
P |
S |
Al(min) |
N |
|
|
P355NH |
0.20 |
0.50 |
0.9-1.70 |
0.03 |
0.025 |
|
0.02 |
|
Cr |
Cu |
Mo |
Nb |
Ni |
Ti |
V |
|
|
0.30 |
0.30 |
0.08 |
0.005 |
0.50 |
0.03 |
0.10 |
|
Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
|
Grade |
|
P355NH Mechanical Property |
|||||
|
Thickness |
Yield |
Tensilmie |
Elongation |
Impact Energy(KV J) min |
|||
|
P355NH |
mm |
Min Mpa |
Mpa |
Min % |
-20° |
0° |
+20° |
|
≤ 16 |
355 |
490-630 |
22 |
47 |
55 |
63 |
|
|
16> to ≤35 |
355 |
490-630 |
22 |
47 |
55 |
63 |
|
|
35> to ≤50 |
345 |
490-630 |
22 |
47 |
55 |
63 |
|
|
50> to ≤70 |
325 |
490-630 |
22 |
47 |
55 |
63 |
|
|
70> to ≤100 |
315 |
470-610 |
21 |
47 |
55 |
63 |
|
|
100> to ≤150 |
295 |
450-590 |
21 |
47 |
55 |
63 |
|
|
Equivalent steel grade of P355NH |
|||||||
|
Europe |
Belgium |
Germany |
France |
Italy |
Sweden |
India |
Japan |
|
|
|
W St E355 |
A52 AP |
Fe510-2-KW |
SS 21,07,01 |
|
|
