SPV490 is a high-strength, intermediate-temperature pressure vessel steel grade defined by the JIS G3115 standard. It represents the highest strength grade within this specification, commonly used for constructing specialized vessels in the petroleum and chemical industries due to its excellent weldability and toughness.
Key Characteristics and Specifications:
Standard: JIS G 3115:2016
Usage: Ideal for manufacturing pressure vessels for intermediate temperature service.
Material Strength: Offers the highest tensile strength among the SPV series (SPV235 to SPV490).
Dimensions: Available in thicknesses ranging from 6 to 300mm, widths from 1150 to 3700mm, and lengths from 3000 to 18000mm.
Delivery Conditions: Commonly supplied in TMCP (Thermo-Mechanical Control Process), Quenched & Tempered (Q&T), Normalized (N), or As-Rolled (AR) conditions.
| SPV490 Chemical Composition | |||||
| Grade | The Element Max (%) | ||||
| C | Si | Mn | P | S | |
| SPV490 | 0.18 | 0.75 | 1.60 | ≤ 0.020 | ≤ 0.020 |
| Grade | SPV490 Mechanical Property |
|||
| Thickness | Yield | Tensile | Elongation | |
| SPV490 | mm | Min Mpa | Mpa | Min % |
| 6-50 | 490 | 610-740 | 18% | |
| 50-100 | 470 | 610-740 | 25% | |
| 100-200 | 450 | 610-740 | 19% | |
Applications of SPV490
Petrochemical Industry: Widely used in manufacturing high-pressure reactors, heat exchangers, separators, spherical tanks, and oil/gas storage tanks. It is suitable for harsh working environments involving thermal cycling and medium corrosion, ensuring equipment safety under high-temperature and high-pressure conditions
Power Generation Sector: Applied to fabricate boiler steam drums, nuclear reactor pressure vessels, and hydropower station high-pressure pipelines. Its excellent toughness and stable mechanical properties meet the strict safety requirements of power equipment operation
Boiler and Pressure Vessel Field: Core material for industrial boilers, liquefied petroleum gas cylinders, and heat exchangers. It can withstand extreme pressure fluctuations and low-temperature environments, avoiding brittle fracture risks
Other Fields: Used in shipbuilding, bridge construction, and heavy machinery manufacturing to produce structural components requiring high strength and weldability, enhancing structural stability and durability
Application Conditions
Standard Compliance: Must meet JIS G3115 standard (equivalent to Chinese standard GB/T 713-2023 Q490R) and can be customized according to SA 662/SA 662 M specifications
Mechanical Property Requirements: Yield strength ≥490MPa (for 6-50mm thickness), tensile strength 610-740MPa, elongation ≥18%. Impact energy ≥47J at -10℃ to ensure low-temperature toughness
Chemical Composition Control: Carbon ≤0.18%, silicon ≤0.75%, manganese ≤1.60%, phosphorus and sulfur ≤0.030% each to guarantee weldability and corrosion resistance
Processing and Inspection: Delivery status includes hot-rolled, normalized, or quenched-tempered. Ultrasonic testing (per ASTM A435/A578) and third-party inspection (ABS, DNV, SGS, etc.) are mandatory for key applications
Dimension Range: Thickness 6-300mm, width 1500-4200mm, length 3000-18000mm. Custom sizes available with minimum order quantity of 1 piece.
| Grade | Minimum Yield Strength Approx. |
|---|---|
| SPV235 | 235 MPa |
| SPV315 | 315 MPa |
| SPV355 | 355 MPa |
| SPV410 | 410 MPa |
| SPV450 | 450 MPa |
| SPV490 | 490 MPa |
advantages
1. High Strength-to-Weight Ratio
As the highest-strength grade in the JIS G3115 series, SPV490 offers a minimum yield strength of 490 MPa. This allows engineers to design pressure vessels with thinner walls, significantly reducing the overall weight of the structure and lowering material and transportation costs.
2. Superior Weldability
Despite its high strength, the chemical composition (specifically the low Carbon Equivalent) is optimized to prevent cold cracking. This ensures high-quality joints and structural reliability in complex welded assemblies like spherical tanks and reactors.
3. Excellent Low-Temperature Toughness
SPV490 maintains high impact resistance even in colder environments. It typically undergoes Charpy V-notch testing at -10°C or lower, ensuring the material remains ductile and resists brittle fracture under pressure fluctuations.
4. High-Pressure Stability
The grade is specifically engineered for intermediate temperature service. It retains its mechanical properties under the sustained thermal and internal pressure stresses found in boiler steam drums and chemical storage systems.
5. Manufacturing Versatility
It can be supplied in various heat-treated states-Normalized (N), Quenched and Tempered (QT), or As-Rolled-allowing users to tailor the material's hardness and ductility to specific industrial requirements.
For more details about GNEE's steel products, contact us at beam@gneesteelgroup.com. We look forward to working with you.
What is SPV490?
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.
What are the main chemical components of SPV490?
The main chemical components of SPV490 include C, Si, Mn, P, S, etc. The content of each component is strictly controlled to ensure the steel plate's strength, toughness and weldability, meeting relevant industrial standards.
What is the minimum yield strength of SPV490?
The minimum yield strength of SPV490 is 490MPa, which is a key index reflecting its bearing capacity. This strength level enables it to be widely used in high-pressure equipment manufacturing fields.
What are the common application fields of SPV490?
SPV490 is commonly used in manufacturing boilers, chemical reactors, oil storage tanks, gas cylinders and other pressure vessels. It is also applied in petroleum, chemical, power and other industries with high safety requirements.
Does SPV490 have good weldability?
Yes, SPV490 has excellent weldability. Its chemical composition is reasonably designed, and it can form firm weld joints through appropriate welding processes without obvious defects such as cracks, ensuring structural integrity.
What standards does SPV490 comply with?
SPV490 mainly complies with the Japanese industrial standard JIS G 3115. This standard specifies the technical requirements, test methods and inspection rules of pressure vessel steel plates.
What is the tensile strength range of SPV490?
The tensile strength range of SPV490 is generally 610-770MPa. This range of tensile strength ensures that the steel plate can resist external tension and is not easy to break during use.
Can SPV490 be used in low-temperature environments?
SPV490 has a certain low-temperature toughness, but its applicable low-temperature range is limited. It is usually suitable for environments above -10℃; for lower temperatures, special low-temperature pressure vessel steel should be selected.
What heat treatment processes does SPV490 usually undergo?
SPV490 usually undergoes normalizing heat treatment. Normalizing can refine the grain structure of the steel plate, improve its mechanical properties, make the structure uniform, and enhance its toughness and strength.
What is the thickness range of SPV490 steel plates?
The common thickness range of SPV490 steel plates is 6mm-100mm. Different thicknesses are selected according to the actual use requirements of pressure vessels to ensure the equipment's pressure-bearing capacity and safety.