Low, medium and high pressure boiler plate of small, medium and large enterprises

  Boiler plate is a large category of steel plate, which is mainly used for making boilers
Heat treatment: hot rolling, normalizing, controlled rolling, annealing, tempering + normalizing, quenching and tempering
The executive standard of boiler plate in the national standard is gb713

Smelting:
Under the existing conditions, there are two key points to improve the purity of molten steel
The first is to strengthen the control of smelting operation in front of the furnace, adopt the optimized design of oxygen lance nozzle and audio frequency control slag making technology, and with the assistance of steelmakers' experience, so as to reduce the oxygen content in steel as much as possible on the premise of ensuring the removal of S and p; The double slag retaining process of slag retaining ball + slag retaining cap is adopted in the tapping process to reduce the transfer slag entering the ladle
At the same time, ladle covering agent and molten steel purification agent with De-S function are added
In addition, in the post furnace refining process, the bottom blowing argon forced stirring measures are combined with the wire feeding process to ensure the floating of inclusions in molten steel, strengthen the reaction of slag steel interface in ladle, further remove sulfur and phosphorus, reduce the oxygen content in steel, improve the morphology of inclusions and improve the purity of molten steel

Q345R steel plate is a boiler container plate, which is widely used in chemical, petroleum, power station, boiler and other industries
It is generally used to make reactors, separators, heat exchangers, air ducts, liquefied gas tanks, boiler gas bags and liquefied petroleum gas cylinders

Chemical composition: C: & le; 0
20，Si：≤ 0
55，Mn：1
20— 1
70，P：≤ 0
025，S：≤ 0
010，Ni：≤ 0
30，
  Cu：≤ 0
30，Cr：≤ 0
30，Mo：≤ 0
08，Nb：≤ 0
050，V：≤ 0
050，Ti：≤ 0
030，Alt：≥ 0
020, other Cu + Ni + Cr + Mo & le; 0
70。
mechanical property
  Yield strength: & le; 16mm：≥ 345，16— 36：≥ 325，36— 60：≥ 315，60— 100：≥ 305，100— 150：≥ 285， 150— 200：≥ 265。 Tensile strength: 470 & mdash; 640。 Impact test: temperature: 0 ℃: ≥ 34。 Elongation: & Ge; 21。 High temperature mechanical properties: temperature 500 ℃: 20 & mdash; 36: yield & Ge; 180。