EN 10025-6 steel grade S550QL High strength steel
The steel making process of high strength steel plate S550QL shall be in accordance with EN 10025-1. If specified at the time of order the steel making process shall be reported to the purchaser. The low temperature impacting test for high strength steel plate S550QL should be done at minus 40 centigrade.
Carbon Equivalent: Ceq = [C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15]%
|
Grade |
S550QL Mechanical Property |
|||||
|
Thickness |
Yield |
Tensile |
Elongation |
Min Impact Energy |
||
|
S550 QL |
mm |
Min Mpa |
Mpa |
Min % |
-40 |
30J |
|
3<t≦50 |
550 |
640-820 |
16 |
-40 |
30J |
|
|
50<t≦100 |
530 |
640-820 |
16 |
-40 |
30J |
|
|
100<t≦150 |
490 |
590-770 |
16 |
-40 |
30J |
|
Chemical composition for S550QL High strength steel (Heat Analysis Max%)
|
Main chemical elements composition of S550QL |
|||||||
|
C |
Si |
Mn |
P |
S |
N |
B |
Cr |
|
0.20 |
0.80 |
1.70 |
0.020 |
0.010 |
0.015 |
0.005 |
1.50 |
|
Cu |
Mo |
Nb |
Ni |
Ti |
V |
Zr |
|
|
0.50 |
0.70 |
0.06 |
2.0 |
0.05 |
0.12 |
0.15 |
|
S550Q standard toughness, S550QL high toughness and S550QL1 extra toughness
S550Q - according to EN 10025-6 with minimum impact values down to -20°C (-4°F)
S550QL - according to EN 10025-6 with minimum impact values down to -40°C (-40°F)
S550QL1- according to EN 10025-6with minimum impact values down to -60°C (-76°F)
S550Q - according to EN 10025-6 with minimum impact values down to -20°C (-4°F)
S550QL - according to EN 10025-6 with minimum impact values down to -40°C (-40°F)
S550QL1- according to EN 10025-6with minimum impact values down to -60°C (-76°F)
EN 10025-6 steel grade specification is a high yield strength structural steels in the quenched and tempered condition steel plate grade in S460Q, S460QL, S460QL1, S550Q, S550QL, S550QL1, S500Q, S500QL, S500QL1, S960Q, S960QL, S620Q, S620QL, S620QL1, S690Q, S690QL, S690QL1, S890Q, S890QL1 and S890QL steel plate grade.
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