SPV450 is a steel plate grade specifically designed for boilers and pressure vessels, produced according to the JIS G3115 standard. It is known for its high yield strength and excellent weldability, making it suitable for intermediate-temperature services in demanding industrial environments.
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SPV450 Chemical Composition |
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Grade |
The Element Max (%) |
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C |
Si |
Mn |
P |
S |
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SPV450 |
0.18 |
0.75 |
1.60 |
0.030 |
0.030 |
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Grade |
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SPV450 Mechanical Property |
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Thickness |
Yield |
Tensile |
Elongation |
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SPV450 |
mm |
Min Mpa |
Mpa |
Min % |
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6-50 |
450 |
570-700 |
19% |
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50-100 |
430 |
570-700 |
26% |
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100-200 |
410 |
570-700 |
20% |
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Common Applications
The steel is widely utilized in sectors such as petroleum, chemical processing, and power generation. Specific equipment includes:
Pressure Vessels: Reactors, separators, and spherical tanks.
Boilers: Boiler drums and high-pressure steam containers.
Storage: Liquefied gas tanks and nuclear reactor vessels.
Delivery & Treatment
Status: Typically delivered in Normalized (N) or Hot Rolled conditions.
Testing: End-users often require additional verification such as Ultrasonic Testing (UT) and Simulated Post-Welded Heat Treatment (SPWHT).
Equivalent Grades
SPV450 is roughly equivalent to several ASTM A533 classes, including ASTM A533 Type A, B, and C (Class 1).
process characteristics
1. Refined Heat Treatment
To achieve its high yield strength (min. 450 MPa), SPV450 is typically delivered in a Normalized (N) or Quenched and Tempered (Q+T) state. These processes refine grain size, improving the balance between toughness and strength while ensuring structural uniformity across the plate.
2. Improved Weldability
A defining feature is its improved weldability, achieved by controlling the carbon equivalent (Ceq). This reduces the risk of cold cracking and allows for Simulated Post-Weld Heat Treatment (SPWHT), ensuring the welded joints maintain mechanical integrity similar to the base metal.
3. Precision Rolling and Shaping
Modern production often utilizes Thermomechanical Controlled Processing (TMCP) or advanced hot-rolling techniques. These ensure high dimensional accuracy (minimal thickness fluctuation) and excellent flatness, which are critical for forming large-scale reactor components or spherical tanks.
4. Stringent Quality Testing
The process involves rigorous non-destructive testing, primarily Ultrasonic Testing (UT), to detect internal defects. For specialized applications, it can also undergo HIC (Hydrogen-Induced Cracking) and SSC (Sulfide Stress Corrosion) resistance testing.
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.
What are the main chemical components of SPV450?
The main chemical components of SPV450 include carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), etc. Strict control of these elements ensures its stable mechanical properties and processing performance.
What is the minimum yield strength of SPV450?
The minimum yield strength of SPV450 is 450 MPa, which is the key indicator for its classification as high-strength steel. This strength enables it to bear heavy loads in various harsh working environments without deformation.
In which industries is SPV450 widely applied?
SPV450 is widely used in industries such as petroleum, chemical, construction machinery, shipbuilding and power generation. It is often used to make pressure vessels, crane arms, ship hull structures and other key components.
What is the weldability of SPV450 like?
SPV450 has good weldability. With proper preheating and post-weld heat treatment, it can form firm weld joints without cracks or other defects. This makes it easy to process into complex structural parts.
What is the maximum operating temperature of SPV450?
The maximum safe operating temperature of SPV450 is generally around 450°C. Beyond this temperature, its mechanical strength will decrease significantly, affecting the safety and service life of the components.
What is SPV450?
SPV450 is a type of high-strength structural steel commonly used in industrial and engineering fields. It features excellent toughness, weldability and corrosion resistance, suitable for manufacturing heavy-duty machinery and construction components.
How to maintain SPV450 components in corrosive environments?
To maintain SPV450 in corrosive environments, measures such as anti-corrosion coating, galvanizing or cathodic protection can be adopted. Regular cleaning and inspection are also necessary to prevent corrosion damage.
What is the difference between SPV450 and SPV410?
The main difference lies in yield strength: SPV450 has a minimum yield strength of 450 MPa, while SPV410 is 410 MPa. SPV450 also has better toughness and wear resistance, suitable for higher-load scenarios.
Can SPV450 be used for pressure vessel manufacturing?
Yes, SPV450 is widely used in pressure vessel manufacturing. Its high strength and good toughness can withstand high internal pressure, meeting the safety standards of pressure vessel materials in petroleum and chemical industries.
What processing methods are suitable for SPV450?
SPV450 is suitable for various processing methods, including cutting, bending, stamping and welding. It has good plasticity, which can ensure the accuracy and quality of processed components without brittle fracture.