St52-3 Low alloy high-strength structural steel plate DIN 17100 standard

St52-3 is a low-alloy high-strength structural steel plate that complies with the German standard DIN 17100. St52-3 steel plate has excellent mechanical and processing properties and is mainly used in industries such as civil construction, underground engineering, bridge structures, marine structures, container manufacturing, and car and machine manufacturing. ST52-3 is equivalent to Chinese brand Q345,16mn, ST52-3 is equivalent to European brand S355, German material number: 1.0570

The "St" in the naming of St52-3 steel plate represents "steel", which is carbon steel. The number "52" indicates an average carbon content of 0.52% in steel, and "3" indicates a quality grade of 3. For steel grades with selective deoxidation methods, the corresponding symbol (U or R) should be placed in front of the steel grade. For steel with special purposes, such as USt52-3 or RRSt37-2.

Chemical composition

The chemical composition of steel plate St52-3 mainly includes elements such as carbon (C), silicon (Si), phosphorus (P), and sulfur (S). The specific composition indicators are as follows:

Elemental composition (%) Carbon (C) ≤ 0.20 Silicon (Si) ≤ 0.50 Phosphorus (P) ≤ 0.040 Sulfur (S) ≤ 0.040

Mechanical properties

The mechanical properties of steel plate St52-3 are excellent, with the following specific indicators:

Tensile strength: 490-630MPa

Yield strength: The yield strength varies depending on the thickness of the plate. For example, when the plate thickness is ≤ 16mm, the yield strength is ≥ 355MPa; When the plate thickness is between 16-40mm, the yield strength is ≥ 345MPa; Similarly, until the plate thickness exceeds 100mm, the yield strength needs to be determined according to the agreement.

Elongation rate: ≥ 18% (some materials may mention a higher elongation rate, such as ≥ 21%, depending on the specific production process and quality control)

Impact energy: At 0 ℃, the impact energy is ≥ 23J (or ≥ 27J, depending on different data)

Production process and workflow

The production process and flow of steel plate St52-3 generally include the following steps:

Raw material control: Select high-quality steel billets as raw materials for inspection and screening.

Heating: Place the steel billet into a heating furnace for preheating to reach a certain temperature.

Rolling: Using hot rolling technology, continuous rolling is carried out through a rolling mill to adjust the size and shape.

Cooling: Hot rolled steel plates require rapid cooling to obtain good mechanical properties.

Bundling, cutting, and marking: Bundle and cut according to the production order requirements to the set length, and process and mark.

Quality control: Conduct quality control measures such as visual inspection, dimensional measurement, chemical composition testing, and mechanical performance testing on the produced steel plates.

Packaging and transportation: Packaging and labeling qualified steel plates, and then transporting them to the customer's designated location.

Application Fields

St52-3 low-alloy high-strength structural steel is widely used in multiple industries due to its excellent mechanical properties and good processability, including but not limited to:

Civil buildings: used for supporting and load-bearing parts of various building structures.

Underground engineering: support and lining structures for projects such as subways and tunnels.

Bridge structure: As key load-bearing components such as the main beam, crossbeam, and longitudinal beam of a bridge.

Marine structures: Manufacturing marine engineering structural components such as offshore platforms and dock facilities.

Mechanical equipment: Manufacturing various engineering machinery, mining machinery, and heavy equipment.

Automotive and machine manufacturing: used to manufacture components such as chassis, body, and engine of automobiles, as well as structural components of machinery and equipment.

St52-3 low-alloy high-strength structural steel plate has been widely used in multiple industries due to its excellent mechanical properties and good processing performance. Its production process is strict and quality control is in place, ensuring the stability and reliability of the product.

The normal thickness range of ST52-3 steel plate that BBN Steel can provide is between 8mm-500mm, with a width of 2000mm-4020mm and a length of 9000mm-17000mm. If you have needs for these metal materials, please contact us.

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