Products Description
S550QL is a type of high-strength steel that meets the European standard EN 10025-6. The following are details about the standard, chemical composition, mechanical properties, applications, status, advantages, disadvantages, common forms, and international equivalents of S550QL high-strength steel.
Products Specification
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Gangsteel Grade : |
EN10025-6 S550QL |
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Specification (mm) |
THK: 3 to 300, Width: 1500 to 4050, Length: 3000 to 27000 |
|
Standard: |
Technical delivery conditions for flat products of high yield strength structural steels in the quenched and tempered condition |
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Approval By Third Party |
ABS, DNV, GL, CCS, LR , RINA, KR, TUV, CE |
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Classification: |
Hot rolled products of structural steels |
The tables below show the mechanical properties of grade S550QL
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Minimum yield strength - ReH |
Tensile strength Rm |
Minimum elongation - A |
|||||
| Steel grade |
Nominal thickness |
Nominal thickness |
|||||
|
>3 |
>50 |
>100 |
>3 |
>50 |
>100 |
||
| S550QL |
550 |
530 |
490 |
640-820 |
640-820 |
590-770 |
16 |
Notch impact test.
Notch impact test - longitudinal. Minimum values of impact energy for impact tests on longitudinal V-notch test pieces for quenched and tempered steel
|
Temperature |
-40 |
-20 |
0 |
|
Min. absorbed energy |
30 |
40 |
50 |
Notch impact test - transverse. Minimum values of impact energy for impact tests on transverse V-notch test pieces for quenched and tempered steel, when the impact test on transverse test pieces is agreed at the time of the order.
|
Temperature |
-40 |
-20 |
0 |
|
Min. absorbed energy |
27 |
30 |
35 |
The tables below show the chemical composition of grade S550QL
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Ladle analysis. |
|||||||||||||||||||
| Steel grade |
C |
Mn |
Si |
P |
S |
B |
Nb |
V |
Ti |
Cr |
Mo |
Ni |
Cu |
Mo |
N |
Zr |
CEV |
||
| ≤50 | >50 ≤100 |
>100 ≤150 |
|||||||||||||||||
| S550QL |
0,20 |
1,70 |
0,80 |
0,020 |
0,010 |
0,005 |
0,06 |
0,12 |
0,05 |
1,50 |
0,70 |
2,0 |
0,50 |
0,70 |
0,015 |
0,15 |
0,65 |
0,77 |
0,83 |
S550QL Steel Grade Equivalent Table
|
European old |
France |
Germany |
|
FeE 550 V KT |
E 550T |
StE550V |
Applications of S550QL Steel Plate
S550QL is a high-strength low-alloy structural steel with a minimum yield strength of 550 MPa, tensile strength ranging from 650–800 MPa, and excellent impact toughness (Charpy V-notch ≥30 J at -40°C). Thanks to its outstanding strength, toughness, and weldability, S550QL is widely used in engineering fields that require high load-bearing capacity and safety.
In heavy transportation, S550QL steel plates are used for the structural frames and load-bearing components of trucks, trailers, railway freight cars, and other heavy-duty transport vehicles. Its high strength allows for lighter designs while maintaining safety, improving transport efficiency, and reducing fuel consumption.
In the construction industry, S550QL is applied in high-rise buildings, bridge girders, steel-structured factories, and industrial warehouses. Its superior mechanical properties ensure structural stability and durability over long-term service, while reducing overall structural weight.
In machinery manufacturing and lifting equipment, S550QL steel plates are used for crane booms, excavator arms, loader buckets, and other critical components of heavy machinery. These parts are subjected to high impact loads and cyclic stress during operation, and S550QL's high toughness and fatigue resistance ensure reliable long-term performance and reduced maintenance costs.
Additionally, S550QL offers excellent weldability and machinability, making it suitable for complex structural components and enabling long service life and safety under harsh working conditions.
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