Technical requirements for EN 10025-6 high strength steel S550QL1

Application of medium and thick plates: Medium and thick plates are used for construction engineering, machinery manufacturing, shipbuilding, bridge construction, etc. Medium and thick plates EN 10025-6 high strength steel S550QL1 can also be used to manufacture various containers, furnace shells, furnace plates, some parts of tractors and welding components. Medium and thick plates are usually in form of bridges and automobile static steel plates, low alloy steel plates, shipbuilding steel plates, boiler steel plates, pressure vessel steel plates, checkered steel plates, automobile girder steel plates, etc.

The difference between cold rolled steel sheet and hot rolled steel plate. The carbon content of EN 10025-6 high strength steel S550QL1, hot rolled steel plate is slightly higher than that of cold rolled steel sheet. In the case of little difference in composition, the density of cold rolled steel sheet and hot rolled steel plate is the same. Hot rolled steel plate has characteristics of low hardness, easy processing and good ductility. Cold rolled steel sheet has high hardness, and it is relatively difficult for processing. But it is not easy to deform and has high strength. Hot rolled steel plate can be made into alloy steel plate by adding other elements, and its properties are also excellent compared with other high-quality steel plates.

Both parties shall confirm the EN 10025-6 high strength steel S550QL1 material object and the quality of the products, confirm the reasons for the defects and the quality of the products, and sign the quality inspection agreement. Major quality objections shall be reported to relevant leaders in a timely manner, and shall be discussed and solved with the EN 10025-6 high strength steel S550QL1 steel plant.

Q890E steel plate chemical composition: C≤0.20, Si≤0.80, Mn≤2.00, P≤0.020, S≤0.010, Cu≤0.50, Cr≤1.50, Ni≤2.00, Mo≤0.70, B≤0.0050, V≤0.12, Nb≤0.06, Ti≤0.05.Q890E steel plate yield strength: ≥890Mpa when thickness ≤50mm; yield strength: ≥830Mpa when 50mm ≤ thickness ≤100mm.Application scope of EN 10025-6 high strength steel S550QL1, Q890E steel plate: Q890E steel plate is suitable for manufacturing hydraulic supports, heavy vehicles, construction machinery and other steel structures requiring good weldability.