GB3531 16MnDR Steel Plate For Boiler And Pressure Vessel

GB3531 16MnDR is a kind of steel plate for low - temperature pressure vessels. The following is a detailed introduction about it:

 

Chemical composition:
Carbon (C): The content is ≤0.20%. Carbon is an important element affecting the strength and hardness of steel. However, if the carbon content is too high, it will reduce the toughness and welding performance of the steel. The relatively low carbon content in this steel plate ensures its good toughness and weldability at low temperatures.
Silicon (Si): The content is between 0.15 - 0.50%. Silicon, as a deoxidizer, can improve the quality of steel and also increase the strength and hardness of steel.
Manganese (Mn): The content is 1.20 - 1.60%. Manganese is a good deoxidizer and desulfurizer, which can reduce the harmful effects of sulfur, improve the quality of steel, and at the same time increase the strength, toughness and hardenability of steel.
Phosphorus (P): The content is ≤0.025%. Phosphorus is a harmful element that will increase the cold brittleness of steel, so its content needs to be strictly controlled.
Sulfur (S): The content is ≤0.015%. Sulfur will increase the hot brittleness of steel and reduce the toughness and welding performance of steel, so its content also needs to be controlled at a low level.
Aluminum (Alt): The content is ≥0.02% (some data show ≥0.015%). Aluminum can play a role in refining grains, improving the strength and toughness of steel.

 

Mechanical properties:
Yield strength: It varies according to the thickness of the steel plate. For steel plates with a thickness of 6 - 16mm, the yield strength is ≥315MPa; for those with a thickness of 16 - 36mm, it is ≥295MPa; for those with a thickness of 36 - 60mm, it is ≥275MPa; for those with a thickness of 60 - 100mm, it is ≥255MPa; and for those with a thickness of 100 - 120mm, it is ≥265MPa.
Tensile strength: It is between 450 - 620MPa.
Elongation: ≥21%, which reflects the plastic deformation ability of the steel.
Impact test: At a temperature of - 40°C, the impact absorption energy is ≥27J (for some thickness ranges, it is required to be ≥47J), which indicates that the steel plate has good toughness at low temperatures and can withstand impact loads in a low - temperature environment.

 

Delivery state: Normalized and inspected by ultrasonic testing with a level above three. Normalizing treatment can make the structure of the steel plate more uniform and improve its comprehensive performance. The ultrasonic testing is to ensure that there are no defects inside the steel plate and guarantee the quality.

 

Application: It is mainly used in the manufacturing of pressure vessels, boilers, storage tanks, heat exchangers and other equipment, and is widely used in industries such as petroleum, chemical engineering and gas.

 

In short, the GB3531 16MnDR steel plate has good low - temperature toughness, relatively high strength and good welding performance, and is suitable for the manufacturing of pressure vessels and other equipment in low - temperature environments. During the use process, it is necessary to design, manufacture and inspect strictly in accordance with relevant standards and specifications to ensure the safe operation of the equipment.

 

 

Grade	Chemical compostion %
C	Si	Mn	P	S	Als

D

≤0.21

≤0.35

0.6-1.2

≤0.035

≤0.035

≥0.015

 

16MnDR steel mainly has the following uses:

 

In the petroleum and chemical fields:

 

Low - temperature storage tanks: They are used to store low - temperature liquids such as liquefied petroleum gas (LPG), liquid nitrogen, and liquid oxygen. These low - temperature storage tanks need to maintain good strength and toughness at low temperatures. The low - temperature performance of 16MnDR steel can meet the usage requirements of storage tanks in low - temperature environments and prevent brittle fracture during the storage of low - temperature media.

Chemical reaction vessels: In some chemical production processes, reactions need to be carried out under specific low - temperature conditions, such as some reaction stages in the production processes of synthetic ammonia and methanol. 16MnDR steel can be used to manufacture reaction vessels in these low - temperature environments to ensure the safety and stability of the chemical reaction process.

 

In the energy field:

 

Natural gas storage and transportation equipment: During the storage and transportation of natural gas, it may be in a relatively low - temperature environment. 16MnDR steel can be used to manufacture natural gas storage tanks, transportation pipelines and other equipment to ensure the safety of natural gas during storage and transportation.

Auxiliary equipment in nuclear power plants: Some equipment in nuclear power plants needs to operate in a low - temperature environment. 16MnDR steel can be used to manufacture the shells, pipelines and other components of these equipment to ensure the safety and reliability of nuclear power plants during operation.

 

 

 

 

 

 

 

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