SPV490 is a kind of pressure vessel steel plate mainly used in manufacturing pressure vessels. It has excellent mechanical properties, good weldability and high strength, which can bear certain pressure and ensure the safe operation of equipment.
The SPV490 boiler steel plate offered by GNEE belongs to the Japanese standard boiler and pressure vessel steel plate, the implementation standard: the implementation of the Japanese standard "JISG3115". We provide SPV490 pressure vessel plate material with a small amount of alloying elements, which can make SPV490 pressure vessel steel plate has high strength and impact toughness, at the same time, we provide SPV490 pressure vessel plate with good machinability. Meanwhile, our SPV490 pressure vessel steel plate has good processing performance, and we can provide processing service according to your product requirements. In addition, our SPV490 boiler steel plate has good corrosion resistance.
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SPV490Chemical Composition |
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Grade |
The Element Max (%) |
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C |
Si |
Mn |
P |
S |
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SPV490 |
0.18 |
0.75 |
1.60 |
0.030 |
0.030 |
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Grade |
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SPV490 Mechanical Property |
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Thickness |
Yield |
Tensile |
Elongation |
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SPV490 |
mm |
Min Mpa |
Mpa |
Min % |
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6-50 |
490 |
610-740 |
18% |
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50-100 |
470 |
610-740 |
25% |
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100-200 |
450 |
610-740 |
19% |
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The manufacturing and fabrication processes
1. Steel Production & Refining
Basic Oxygen Furnace (BOF) / Electric Arc Furnace (EAF): The primary melting phase.
Secondary Refining (LF/VD): Ladle Furnace (LF) and Vacuum Degassing (VD) are used to achieve low sulfur and phosphorus levels, minimizing impurities that could cause brittle failure.
Fine-Grain Practice: Aluminum or other grain-refining elements are added to produce a fine austenitic grain size.
2. Heat Treatment Processes (Critical Phase)
To reach its high-strength properties, SPV490 undergoes specific thermal cycles:
Normalizing (N): The plate is heated to approximately 900°C and air-cooled to refine the grain structure.
Quenching & Tempering (QT): This is the most common process for SPV490. The steel is rapidly cooled (quenched) and then reheated (tempered) to achieve the 490 MPa yield strength while maintaining high impact toughness.
Thermo-Mechanical Control Process (TMCP): Used by advanced mills to achieve high strength through controlled rolling and cooling, often reducing the need for excessive alloying.
3. Fabrication & Forming
Cutting: Performed via Oxy-fuel gas cutting or Plasma cutting. Due to the high carbon manganese content, cutting edges may require grinding to remove the hardened layer before welding.
Forming:
Cold Forming: Standard for thinner plates; requires calculation of "spring-back."
Hot Forming: Performed for thick-walled vessel heads. If heated above the AC1 temperature, the plate must be re-heat treated (Normalizing or QT) to restore mechanical properties.
4. Welding Technology
Edge Preparation: Machining or grinding the "bevel" to ensure full penetration.
Preheating: Essential to avoid Hydrogen-Induced Cracking (HIC). Preheating temperatures typically range from 100°C to 150°C based on the thickness and Carbon Equivalent (Ceq).
Consumables: High-strength low-hydrogen electrodes or wires are used to match the 610–740 MPa tensile strength.
Post-Weld Heat Treatment (PWHT): Generally conducted at 560°C – 620°C to relieve residual stresses and improve ductility in the Heat Affected Zone (HAZ).
5. Quality Inspection (NDT)
Ultrasonic Testing (UT): Checks for internal defects like laminations.
Charpy V-Notch Impact Test: Conducted at -10°C (or as specified) to verify low-temperature toughness.
Z-Direction Testing: Optional testing for "through-thickness" ductility to prevent lamellar tearing in heavy-welded joints.
Primary Applications:
Pressure Vessel Fabrication: Widely used to manufacture spherical storage tanks, reactors, and separators for the oil, gas, and petrochemical sectors.
Boiler Systems: Employed in power plants for high-pressure components like steam drums, headers, and boiler shells.
Storage Solutions: Ideal for LPG/LNG storage tanks and cryogenic transport vessels due to its excellent low-temperature toughness.
Heat Exchangers: Used in refinery and chemical processing units where plates must withstand high internal thermal and pressure stresses.
Heavy Infrastructure: Utilized in high-pressure penstocks for hydroelectric power stations and large-diameter pipelines.
Marine & Transport: Found in pressurized cargo containers and specialized components for ships carrying hazardous materials.
Full specification and details are available on request. The above information is provided for guidance purposes only. For specific design requirements please contact our technical sales staff.
Is SPV490 corrosion-resistant?
SPV490 has basic corrosion resistance in general environments, but it is not resistant to strong corrosive media such as acid and alkali. In corrosive environments, anti-corrosion treatment such as coating or galvanizing is needed.
What is the difference between SPV490 and SPV410?
The main difference lies in strength. SPV490 has a higher minimum yield strength (490MPa) than SPV410 (410MPa). SPV490 is suitable for higher pressure occasions, while SPV410 is used for medium and low pressure equipment.
How to inspect the quality of SPV490 steel plates?
The quality inspection of SPV490 includes chemical composition analysis, mechanical property test (tensile, impact, yield test), ultrasonic flaw detection, surface quality inspection, etc., to ensure it meets standard requirements.
Can SPV490 be cut by flame cutting?
Yes, SPV490 can be cut by flame cutting. It has good flame cutting performance, and the cut surface is smooth without obvious burrs or cracks. Proper cutting parameters should be controlled during operation.
What is the application of SPV490 in the petroleum industry?
In the petroleum industry, SPV490 is used to manufacture oil pipelines, oil storage tanks, oil well casings and other equipment. It can bear the pressure of crude oil and natural gas and adapt to the harsh working environment of the oil field.
What is the impact toughness of SPV490?
The impact toughness of SPV490 is good, and the impact energy at room temperature is generally not less than 34J. Good impact toughness ensures that the steel plate is not easy to brittle fracture when subjected to sudden impact.
Can SPV490 be bent and formed?
Yes, SPV490 has good formability and can be bent, rolled and other forming processes. The forming temperature and bending radius should be controlled during processing to avoid cracks or deformation.
What is the density of SPV490?
The density of SPV490 is the same as that of ordinary carbon steel, about 7.85g/cm³. This density value is an important parameter for calculating the weight of steel plates and designing pressure vessel structures.
What are the requirements for the welding materials of SPV490?
The welding materials of SPV490 should match its mechanical properties. Generally, low-hydrogen type welding rods or welding wires are selected to ensure that the weld joint has the same strength and toughness as the base metal.
Is SPV490 a low-alloy steel?
Yes, SPV490 is a low-alloy high-strength pressure vessel steel. It adds a small amount of alloying elements such as Mn and Si on the basis of carbon steel to improve its strength and toughness without increasing production costs too much.