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P275NH steel plate specification
P275NH steel plate is according to EN 10028:3 standard, the specification EN 10028:3 covers a range of weldable fine grain steels supplied in the normalised condition and intended for pressure purposes. P275NH is steel for pressure purposes (P) with minimum yield strength of 275 MPa (275) which has specified elevated temperature properties (NH).

|
Element |
Max % |
Element |
max % |
|
C |
0.18 |
Cu |
0.30 |
|
Si |
0.40 |
Mo |
0.08 |
|
Mn |
0.50-1.40 |
N |
0.02 |
|
P |
0.03 |
Nb |
0.05 |
|
S |
0.03 |
Ni |
0.50 |
|
AL |
0.020 |
Ti |
0.03 |
|
Cr |
0.30 |
V |
0.05 |
|
Nb+Ti+V |
0.05 |
|
|
|
Grade |
Type |
Thickness |
Yield Strength |
Tensile Strength |
Elongation |
Impact Energy |
|
(mm) |
MPa (min) |
MPa |
% (min) |
(KV J) (min) |
||
|
|
|
|
|
-20 degree |
||
|
P275NH |
Normalized |
t≤ 16 |
275 |
390-510 |
24 |
30 |
|
16< t ≤40 |
265 |
390-510 |
24 |
30 |
||
|
40<t ≤60 |
255 |
390-510 |
24 |
30 |
||
|
60< t ≤100 |
235 |
370-490 |
23 |
30 |
||
|
100<t≤150 |
225 |
360-480 |
23 |
30 |
||
|
150<t≤250 |
215 |
350-470 |
23 |
30 |

