What is the hardness of SPV 490?
SPV 490 is a high-strength pressure vessel steel, but its hardness isn't a single fixed number; it depends on the specific condition (annealed/normalized/as-rolled), with typical values often around 180-220 HB (Brinell Hardness), but can reach higher in as-welded states, emphasizing its strength (yield >490 MPa) over hardness.
SPV490 is a high-strength, low-alloy steel plate, typically conforming to JIS G 3115 for pressure vessels, known for its minimum 490 MPa yield strength, excellent weldability with low carbon content, and suitability for medium-temperature applications in boilers, tanks, and heat exchangers, often delivered in various heat-treated states like quenched & tempered (Q/T).
Key Characteristics:
Standard: JIS G 3115.
Type: Pressure vessel steel plate.
Strength: Minimum yield strength of 490 MPa (for thicker plates) and tensile strength of 610-740 MPa.
Chemical Composition: Low carbon content (e.g., <0.09%), with microalloying elements like Mo, Nb for enhanced properties, and controlled impurities.
Microstructure: Often a ferrite-bainite mix, contributing to high strength.
Applications: Petroleum, chemical, power generation, oil/gas tanks, reactors, heat exchangers, and nuclear components.
Delivery Conditions: Available in various conditions like hot-rolled, normalized, annealed, or quenched & tempered (Q/T).
Why it's Used:
SPV490 offers a good balance of strength, toughness, and weldability, making it ideal for critical equipment in medium-temperature service where structural integrity under pressure is essential, with advanced production methods (like online accelerated cooling) improving its performance and weldability.
How is SPV 490 used in heat exchangers?
SPV 490 is widely used in heat exchangers in industries like petrochemical and power generation. Its ability to withstand high pressures and temperatures, along with its resistance to creep, makes it ideal for continuous heat exchange processes, where reliability, strength, and durability are critical.
What is the maximum operating temperature for SPV 490?
The maximum operating temperature for SPV 490 depends on the specific product, but for SpolarPV solar panels like the SP490HM6-66L, the range is typically -40°C to 85°C (-40°F to 185°F), though you must always check the specific datasheet for your model. If referring to JIS G3115 SPV 490 Q steel, it's a pressure vessel steel with specific welding/preheat guidelines, not a simple max temp, but for general carbon steels, around 399°C (750°F) is a limit for prolonged use.
Can SPV 490 be heat treated?
Yes, SPV 490 can undergo heat treatment processes like normalizing and tempering to refine its microstructure and improve toughness. Normalizing at approximately 900°C followed by air cooling improves strength and ductility. Post-weld heat treatment (PWHT) may also be used after welding to relieve residual stresses and prevent cracking.
Mechnical property for SPV490 steel plate:
| Thickness (mm) | |||
| SPV490 steel plate | ≥6 ≤ 50 | > 50 ≤ 100 | > 100 |
| Yield strength (≥Mpa) | 490 | 470 | 450 |
| Tensile strength (Mpa) | 610-740 | ||
Chemical composition for SPV490 steel plate (Ladle Analysis Max%)
| Main chemical elements composition of SPV490 steel plate | ||||
| C | Si | Mn | P | S |
| 0.18 | 0.75 | 1.60 | 0.030 | 0.030 |
1What industries use SPV 490 steel?
SPV 490 is used primarily in industries such as petrochemical, chemical processing, oil & gas, and power generation. It is employed for applications such as pressure vessels, heat exchangers, and pipelines, where high tensile strength, creep resistance, and thermal stability are essential for the reliability and longevity of equipment under high-temperature and high-pressure conditions.
2What is the equivalent steel grade to SPV 490?
The equivalent steel grade to SPV 490 in the European standard is typically P355NL2, which has similar tensile strength and mechanical properties. Both steels are used in high-pressure, high-temperature applications, including pressure vessels, boilers, and heat exchangers, with P355NL2 generally being used in European markets.
3What is the yield strength of SPV 490?
The yield strength of SPV 490 is typically around 345 MPa. This ensures that the material can withstand high-pressure and high-temperature service without experiencing permanent deformation. This strength is critical for applications where the steel will be subject to constant stress, such as in pressure vessels and boilers.
4What is the tensile strength of SPV 490?
SPV 490 has a minimum tensile strength of 490 MPa. This high strength makes it ideal for pressure applications, ensuring the material performs well under mechanical stress and high-temperature conditions. The steel is commonly used in industries where strength and reliability are paramount, such as in power plants and chemical reactors.
5Can SPV 490 be used for pipelines?
Yes, SPV 490 is commonly used in pipelines for the transportation of high-pressure steam, oil, or gas. Its high strength and resistance to creep at elevated temperatures make it suitable for pipelines in power plants, petrochemical refineries, and chemical plants where durability and reliability under pressure are essential.
6How does SPV 490 perform in pressure vessels?
SPV 490 is an ideal choice for pressure vessels due to its high tensile strength (490 MPa), excellent creep resistance, and weldability. It ensures structural integrity under high-pressure conditions and maintains its mechanical properties even at elevated temperatures, which is crucial in applications such as chemical reactors and distillation columns.
7What are the advantages of using SPV 490?
Key advantages of SPV 490 include,High tensile strength of 490 MPa, suitable for pressure applications.,Excellent creep resistance at high temperatures.,Good weldability, making it easy to fabricate and assemble.,Thermal stability under prolonged heat exposure, ensuring durability in industrial equipment.
If you want to learn more about SPV490 GNEE's products, you can send an email toinfo@gneesteels.com . We are more than happy to assist you.
