Besides Normalized Heat treatment,Low temperature impacting test is also the necessary technical items in rolling.The verification of impacting temperature shall be carried out as belows: S…N shall be at
S…NLshall be at
Else, for the Ladle Analysis and tensile test shall be conform as to the following table.
Property Data:(Ladle Analysis)
|
EN10025-3 | ||||||
|
Grade |
|
S355N |
S355NL |
P460NL | ||
|
Chemical Composition % ≤ |
C |
0.20 |
0.18 |
0.20 | ||
|
Si |
0.50 |
0.60 | ||||
|
Mn |
0.90-1.65 |
1.00-1.70 | ||||
|
P |
0.030 |
0.025 |
0.030 |
0.025 | ||
|
S |
0.025 |
0.020 |
0.025 |
0.020 | ||
|
Nb |
0.05 | |||||
|
V |
0.12 |
0.20 | ||||
|
Al total |
≥0.02 | |||||
|
Ti |
0.05 | |||||
|
Cr |
0.30 | |||||
|
Ni |
0.50 |
0.80 | ||||
|
Mo |
0.10 | |||||
|
Cu |
0.55 | |||||
|
N |
0.015 |
0.025 | ||||
|
Mechanical Property ≥ |
Yield (Mpa) |
t≤16 |
355 |
460 | ||
|
16﹤t≤40 |
345 |
440 | ||||
|
40﹤t≤63 |
335 |
430 | ||||
|
63﹤t≤80 |
325 |
410 | ||||
|
80﹤t≤100 |
315 |
400 | ||||
|
100﹤t≤150 |
295 |
380 | ||||
|
150﹤t≤200 |
285 |
370 | ||||
|
200﹤t≤250 |
275 | |||||
|
Tensile (Mpa) |
t≤100 |
470-630 |
540-720 | |||
|
100﹤t≤200 |
450-600 |
530-710 | ||||
|
200﹤t≤250 | ||||||