12CrMoV pressure vessel steel plate is a kind of high strength, low alloy heat resistant steel, widely used in the manufacture of all kinds of pressure vessel equipment. Its main components include carbon (C), chromium (Cr), molybdenum (Mo) and vanadium (V), and the addition of these alloy elements makes the steel plate have excellent mechanical properties and heat resistance.
Mechanical properties: The steel plate has high yield strength and tensile strength, which can meet the requirements of pressure vessels in high pressure environment. At the same time, it also has good plasticity and toughness, to ensure that it is not easy to fracture in the process of manufacturing and use.
Heat resistance: because it contains a certain amount of chromium, molybdenum and vanadium elements, 1 it can still maintain good mechanical properties and oxidation resistance at high temperature, suitable for the manufacture of pressure vessels working in high temperature environment.
Welding performance: The steel plate has good welding performance and can be welded by a variety of welding methods. However, attention should be paid to controlling welding parameters and post-welding heat treatment during the welding process to avoid defects such as welding cracks.
| C(%) | Si(%) | Mn(%) | Cr(%) | Mo(%) | V(%) |
| 0.08-0.15 | 0.17-0.37 | 0.40-0.70 | 0.30-0.60 | 0.25-0.35 | 0.15-0.30 |
| Temperature(℃) | Modulus of elasticity(GPa) | Mean coefficient of thermal expansion 10-6/(℃) | Thermal conductivity
(W/m·℃) |
Specific thermal capacity
(J/kg·℃) |
Specific electrical resistivity
(Ω mm²/m) |
Density
(kg/dm³) |
| 33 | – | – | – | – | 0.24 | – |
| 837 | 157 | – | 34.3 | 121 | – | – |
| 659 | – | 32 | 23.2 | – | – | 234 |
Material preparation: Before using 12CrMoV pressure vessel steel plate, it should be strictly inspected and tested to ensure that its chemical composition, mechanical properties and surface quality meet relevant standards and requirements. At the same time, the appropriate steel plate specifications and thickness should be selected according to the design requirements of the equipment.
Cutting and processing: When cutting and processing steel plates, appropriate cutting methods and processing equipment should be selected, such as plasma cutting, laser cutting or mechanical cutting. Care should be taken to keep the tool sharp and properly cooled during machining to avoid excessive heat affected zone and cracks.
Welding operation: When welding the steel plate, the appropriate welding method and welding material should be selected according to the thickness of the steel plate and welding requirements. The weld should be preheated before welding to reduce welding stress and crack tendency. Welding parameters, such as current, voltage and welding speed, should be strictly controlled during welding. Proper heat treatment and inspection should be carried out after welding to ensure the quality and performance of the weld.
Inspection and testing: in the process of manufacturing pressure vessels, 1 steel plate should be strictly inspected and tested, including non-destructive testing (such as ultrasonic testing, ray testing, etc.), mechanical property testing and chemical composition analysis, etc. These inspections and tests help to detect potential defects and problems and ensure the safety and reliability of the equipment.
Use and maintenance: When using pressure vessels, the relevant safety operating procedures and maintenance requirements should be observed. Inspect and maintain the equipment on a regular basis to find and deal with potential problems and failures in a timely manner to ensure the normal operation and safety of the equipment.
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