Gangsteel supplies JIS G3115 SPV490 steel plate for welded pressure vessels and high-pressure equipment used at intermediate temperatures. Within the JIS G3115 steel plate family, SPV490 is the highest nominal yield-strength class in the six-grade range, normally supplied quenched and tempered. We combine mill production coordination with plate processing and export supply to suit the project specification.
The number 490 identifies a minimum yield point or proof stress of 490 MPa for plate 6–50 mm thick; it is not a tensile-strength designation or a promise of the same yield value at every thickness. The minimum falls to 470 MPa above 50 mm through 100 mm and 450 MPa above 100 mm through 150 mm. JIS G3115 SPV450 is a related strength class, not an automatic replacement. Selection also depends on delivery condition, toughness, design rules and the edition on the order.
Grade Designation
- JIS G3115 — Japanese specification for steel plates for pressure vessels for intermediate temperature service.
- SPV — the pressure-vessel plate grade series.
- 490 — nominal minimum yield point or proof stress in MPa for 6–50 mm plate.
Common order descriptions include JIS G3115 SPV490, JIS G3115 SPV 490, SPV490 and SPV 490. These spacing variants do not change the grade; the order should also identify the standard edition and delivery condition.
Key Advantages of JIS G3115 SPV490 Steel Plate
- 490 MPa minimum yield point or proof stress at 6–50 mm, with a specified tensile range of 610–740 MPa.
- Killed-steel plate with a defined heat-analysis specification and thickness-dependent tensile requirements.
- Strategic partnerships with domestic steel mills support production planning and sourcing for project orders.
- Competitive pricing with the grade, dimensions, processing scope and inspection requirements agreed before production.
- In-stock inventory of commonly used plate specifications supports fast delivery; availability of the exact grade and size is confirmed at quotation, not assumed.
- Plate processing includes bending, beveling, cutting of special-shaped parts and further deep processing to the agreed drawing.
Chemical Composition (Heat Analysis, Maximum %)
| Element | Heat analysis, % |
|---|---|
| C | 0.18 max |
| Si | 0.75 max |
| Mn | 1.60 max |
| P | 0.020 max |
| S | 0.020 max |
Values follow the 2022 edition, Table 3. All entries in this table are maxima; they are not typical production analyses. Other alloying elements may be added when necessary; for normalized SPV450 and SPV490 plate, additions of unlisted alloying elements are subject to agreement. Product-analysis acceptance and the actual heat chemistry must be checked separately on the mill certificate.
Mechanical Properties
| Plate thickness | Yield point or proof stress min, MPa | Tensile strength, MPa |
|---|---|---|
| 6–50 mm | 490 | 610–740 |
| Over 50–100 mm | 470 | 610–740 |
| Over 100–150 mm | 450 | 610–740 |
| Thickness for elongation | JIS tensile test piece | Elongation min, % |
|---|---|---|
| 6–16 mm | No. 5 | 18 |
| Over 16–20 mm | No. 5 | 25 |
| Over 20–150 mm | No. 5 | 25 |
| Over 20–150 mm | No. 4 | 19 |
The tensile and elongation tables follow Table 8. Elongation depends on thickness and test-piece type; the rows do not require both specimen types for every plate. Buyers should confirm the applicable edition, specimen selection, ordered thickness and guaranteed values on the purchase order and mill certificate. A grade number alone is not a complete acceptance specification.
Delivery Condition and Impact Testing
Quenched and tempered; normalizing may be used instead by agreement.
For plate over 12 mm thick, the standard Table 9 Charpy V-notch requirement is an average of at least 47 J for three longitudinal specimens, with each specimen at least 27 J, tested at −10 °C. A lower test temperature may be agreed. For plate 12 mm and under, impact testing is performed when specified at ordering, using the applicable subsize requirements; the full-size energy values should not simply be applied to every thin plate.
Where the purchaser will carry out normalizing or quenching and tempering by agreement, the standard allows the manufacturer to heat treat the test material only and dispatch the plate as-rolled. State that arrangement explicitly. Delivery condition, subsequent forming and any welding or post-weld heat treatment need project-specific technical review; no universal processing temperatures are implied here.
SPV Grade Comparison
| Grade | Yield min at 6–50 mm, MPa | Yield min over 50–100 mm, MPa | Yield min over 100 mm, MPa | Tensile strength, MPa | Standard thickness scope, mm |
|---|---|---|---|---|---|
| JIS G3115 SPV235 | 235 | 215 | 195 | 400–510 | 6–200 |
| JIS G3115 SPV315 | 315 | 295 | 275 | 490–610 | 6–150 |
| JIS G3115 SPV355 | 355 | 335 | 315 | 520–640 | 6–150 |
| JIS G3115 SPV410 | 410 | 390 | 370 | 550–670 | 6–150 |
| JIS G3115 SPV450 | 450 | 430 | 410 | 570–700 | 6–150 |
| JIS G3115 SPV490 | 490 | 470 | 450 | 610–740 | 6–150 |
Comparison basis: the 2022 edition, Tables 1 and 8. The last yield band ends at 200 mm for SPV235 and 150 mm for the other five grades. The thickness scope is a standard limit, not a stock list or a promise of mill availability. For thermomechanically controlled SPV410, the production-route limit remains 100 mm. Higher nominal strength does not establish interchangeability or vessel-code approval.
Available Dimensions
- Standard thickness scope: 6–150 mm; actual production and supply availability to enquiry.
- Width and length: confirm against the vessel layout, cutting plan and selected mill capability.
- Thickness tolerance: the grade standard’s own thickness-tolerance provisions apply; shape, dimensions and other tolerances follow its references to JIS G 3193.
- Quantity, delivery condition, inspection requirements and processing allowance: specify on the enquiry.
Main Applications
- Welded pressure-vessel shells and heads where the design specifies this grade.
- High-pressure equipment within the intermediate-temperature scope of the material standard.
- Storage vessels and fabrication projects with an approved grade, thickness and toughness specification.
The material standard excludes high-temperature and low-temperature service from its stated scope. A Charpy test temperature is not a design minimum service temperature; the vessel designer must establish permitted service conditions and code acceptance.
Equivalent Grades of JIS G3115 SPV490
No direct cross-standard equivalent is asserted for JIS G3115 SPV490. JIS G3115 SPV450 can be compared within the same JIS G3115 family, but has a different strength designation and is not an equivalent grade. Similar tensile strength in another national standard does not establish matching chemistry, delivery condition, impact requirements or pressure-vessel approval.
Any proposed substitution must be approved by the designer and purchaser after checking the complete material specification, applicable code edition, thickness, test requirements and inspection documents. Do not order an alternative solely from a commercial equivalence chart.
Related Products
- JIS G3115 steel plates — family page
- JIS G3115 SPV235 steel plate
- JIS G3115 SPV315 steel plate
- JIS G3115 SPV355 steel plate
- JIS G3115 SPV410 steel plate
- JIS G3115 SPV450 steel plate
- ASME SA516 steel plates
- ASME SA537 steel plates
- ASME SA517 steel plates
- Pressure vessel and boiler steel plate
Frequently Asked Questions (FAQ)
What is JIS G3115 SPV490 (JIS G3115 SPV 490) steel plate?
It is killed-steel plate for welded pressure vessels and high-pressure equipment in intermediate-temperature service. Its nominal 490 MPa yield class applies to plate 6–50 mm thick; thicker bands have lower specified minima.
What tensile strength does JIS G3115 SPV490 specify?
The tensile range is 610–740 MPa across the standard’s applicable thickness scope. Check the yield and elongation requirements separately for the ordered thickness and specimen type.
What delivery condition is used for JIS G3115 SPV490?
Quenched and tempered; normalizing may be used instead by agreement. The purchase order and mill certificate should state the actual delivery route, including any agreed purchaser heat treatment.
Does JIS G3115 SPV490 need impact testing?
For plate over 12 mm, the standard Table 9 requirement is 47 J average and 27 J individual minimum at −10 °C on longitudinal Charpy V-notch specimens. Thin plate and agreed alternatives require their own specified test arrangements.
Can another grade replace JIS G3115 SPV490?
Not automatically. Review chemistry, thickness-dependent strength, delivery condition, toughness and the design code before approving any substitute. A higher grade number alone does not justify a change.
What should an enquiry for JIS G3115 SPV490 include?
Give the standard edition, thickness × width × length, quantity, delivery condition, design-code requirements, impact testing, inspection document and processing drawing. We can then confirm mill availability, processing scope, price and delivery for that order.
For production and export enquiries for JIS G3115 SPV490 steel plate, please contact Gangsteel with your specification and quantity.