Accreditation Administration System:
Designation of P355ML2, P means this grade steel plates shall be mainly used for pressure vessels building; 355
is its minimum yield strength point; M stands for the rolling delivery condition shall be thermomechanically rolled;
L2 means this steel grade shall be done impacting test at minus 50 centidegree with minimum impact energy 27 J.
Relative Grades in specification EN10028_5 as follows: P355M,P355ML1,P355ML2,P420M,P420ML1,P420ML2,
P460M,P460ML1,P460ML2
Classification of these Grades:
(a) the basic series (P¡M) with -20¡æ impacting test.
(b) Series with low temperature properties down to -40¡æ (P...ML1)
(c) Series with special low temperature properties down to -50¡æ (P...ML2)
Property Data:(Cast Analysis)
|
EN10028-5 | ||||||
|
Grade |
|
P355M |
P355ML1 |
P355ML2 | ||
|
Chemical Composition % ¡Ü By Mass |
C |
0.14 | ||||
|
Si |
0.50 | |||||
|
Mn |
1.60 | |||||
|
P |
0.025 |
0.020 | ||||
|
S |
0.020 |
0.015 | ||||
|
Al total |
¡Ý0.020 | |||||
|
N |
0.015 | |||||
|
Mo |
0.20 | |||||
|
Nb |
0.05 | |||||
|
Ni |
0.50 | |||||
|
Ti |
0.05 | |||||
|
V |
0.10 | |||||
|
Mechanical Property ¡Ý |
Yield (Mpa) |
t¡Ü16 |
355 | |||
|
16©‚t¡Ü40 |
355 | |||||
|
40©‚t |
345 | |||||
|
Tensile (Mpa) |
|
450-610 | ||||
|
Impacting test temperature ¡æ |
|
-20 |
-40 |
-50 | ||
