SPV490 Pressure Vessel Steel Plate - JIS G3115
SPV490 Pressure Vessel Steel Plate - JIS G3115 | High‑Strength Boiler & Vessel Steel
SPV490 is a high‑strength, weldable steel for pressure vessels and boilers produced to JIS G3115, widely used in the energy and petrochemical industries.
Hot rolling, normalising, quenching and tempering, cutting, welding, forming
- Phone : +8618037372205
- Email : [email protected]
- WhatsApp: Contact via Whtsapp
- WeChat: +8618037372205
SPV490 Pressure Vessel Steel Plate - JIS G3115 Introduction
SPV490 is a high‑strength steel grade specified in JIS G3115 for welded pressure vessels and boilers. It belongs to the Mn‑Si‑based low‑alloy steel family, often micro‑alloyed with Ni, Cr, Mo or V to improve toughness and strength. The steel is supplied in normalised or quenched and tempered condition, guaranteeing a minimum yield strength of 490 MPa and excellent notch toughness at low temperatures. Its balanced chemical composition ensures reliable weldability and good formability, making it a preferred choice for critical components in power generation, petrochemical plants and offshore structures.
SPV490 Pressure Vessel Steel Plate - JIS G3115 Chemical composition
The composition according to JIS G3115. Elements marked "if added" are not mandatory but shall be reported if intentionally introduced. Residual elements are controlled to ensure weldability and toughness.
| Chemical element | Standard value | Remarks |
|---|---|---|
| C | ≤0.18 | Ladle analysis |
| Si | ≤0.75 | Ladle analysis |
| Mn | 0.85–1.60 | Ladle analysis |
| P | ≤0.030 | Ladle analysis |
| S | ≤0.030 | Ladle analysis |
| Ni | ≤0.60 | If added, ladle analysis |
| Cr | ≤0.30 | If added, ladle analysis |
| Mo | ≤0.30 | If added, ladle analysis |
| V | ≤0.05 | If added, ladle analysis |
| Nb | ≤0.05 | If added, ladle analysis |
| Ti | ≤0.05 | If added, ladle analysis |
SPV490 Pressure Vessel Steel Plate - JIS G3115 Thermal and electrical physical properties
The following values are typical for manganese‑nickel‑vanadium pressure vessel steels in the normalised or quenched and tempered condition. They are not specified in JIS G3115 but serve as a guide for engineering design.
| Property | Standard value | Unit | Test condition |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ | At 20 °C |
| Modulus of elasticity (E) | 205 | GPa | At 20 °C |
| Shear modulus (G) | 79 | GPa | At 20 °C |
| Poisson's ratio (ν) | 0.3 | – | At 20 °C |
| Thermal expansion coefficient (α) | 11.5 | 10⁻⁶/K | 20–100 °C |
| Thermal expansion coefficient (α) | 12.0 | 10⁻⁶/K | 20–200 °C |
| Thermal conductivity (λ) | 45 | W/(m·K) | At 20 °C |
| Specific heat capacity (cp) | 460 | J/(kg·K) | At 20 °C |
| Electrical resistivity (ρe) | 0.20 | µΩ·m | At 20 °C |
SPV490 Pressure Vessel Steel Plate - JIS G3115 Mechanical properties
Minimum required values according to JIS G3115. Tensile test specimens are taken transverse to the rolling direction. Impact test is performed on longitudinal Charpy‑V specimens at 0 °C. Bending test is carried out with a specified former diameter.
| Property | Required value | Unit | Test condition |
|---|---|---|---|
| Yield strength (ReH) | ≥490 | MPa | Plate thickness ≤50 mm |
| Yield strength (ReH) | ≥480 | MPa | Plate thickness >50 mm ≤100 mm |
| Yield strength (ReH) | ≥450 | MPa | Plate thickness >100 mm ≤200 mm |
| Tensile strength (Rm) | 610–740 | MPa | Plate thickness ≤50 mm |
| Tensile strength (Rm) | 600–730 | MPa | Plate thickness >50 mm ≤100 mm |
| Tensile strength (Rm) | 590–720 | MPa | Plate thickness >100 mm ≤200 mm |
| Elongation (A) | ≥17 | % | Gauge length 200 mm (No.1A test piece), t ≤50 mm |
| Elongation (A) | ≥23 | % | Gauge length 50 mm (No.5 test piece), t ≤50 mm (informative) |
| Elongation (A) | ≥16 | % | Gauge length 200 mm (No.1A), t >50 mm ≤100 mm |
| Elongation (A) | ≥15 | % | Gauge length 200 mm (No.1A), t >100 mm ≤200 mm |
| Bend test (former diameter) | d = 3.5 × t (t ≤25 mm) d = 4.0 × t (t >25 mm) | – | 180° bend, no cracks |
| Impact energy (KV2) | ≥47 (average) | J | Charpy V‑notch, 0 °C, longitudinal |
SPV490 Pressure Vessel Steel Plate - JIS G3115 Fully equivalent material standards and substitutable grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10028‑3 | P460NL2 | Normalised fine grain steel, similar strength and toughness |
| International | ISO 9328‑2 | P460NL2 | Identical to EN 10028‑3 grade |
| USA | ASTM A537 / A537M | Class 2 | Quenched and tempered only; verify impact temperature |
| China | GB/T 713 | Q490R | New Chinese grade for pressure vessels, directly comparable |
SPV490 Pressure Vessel Steel Plate - JIS G3115 Application Introduction
SPV490 plates are designed for welded pressure equipment operating at moderate temperatures. Thanks to its high yield strength and excellent weldability, the grade is widely adopted in the following industries and products. Typical components include cylindrical shells, dished heads, tube sheets, reinforcing pads and nozzles for pressure containment.
Product Applications: Boiler drums and steam separators, High‑pressure vessels (columns, reactors), Heat exchangers, LPG / LNG storage tanks, Penstocks and surge tanks, Offshore platform topside modules
Processed into products: Shell courses (rolled and welded), Dished ends (hot‑pressed or cold‑formed), Tube sheets (machined and drilled), Flanges (welded neck, blind), Manhole rings and reinforcement plates, Support skirts and saddles
Application industries: Petroleum refining, Chemical processing, Power generation (boiler drums), Nuclear energy (non‑irradiated pressure parts), Offshore and marine engineering, Gas storage and transportation, Water treatment
SPV490 Pressure Vessel Steel Plate - JIS G3115 Similar / comparable alternative material recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G3115 | SPV450 | Lower yield strength (≥450 MPa), same standard family |
| USA | ASTM A537 / A537M | Class 1 | Lower yield strength, also used in moderate temperatures |
| Europe | EN 10028‑3 | P355NL2 | Lower strength level (minimum 355 MPa), comparable toughness |
| Germany (historic) | DIN 17155 | 19Mn6 | Obsolete grade, similar C‑Mn base, lower strength |
Notes:
Important: Actual properties shall be confirmed by mill test certificates. For elevated temperature service, design stresses must be taken from the applicable pressure vessel code (ASME, EN 13445, etc.). When post‑weld heat treatment is required, hold time and temperature should be carefully controlled to avoid strength reduction. Supplementary requirements such as ultrasonic testing, high‑temperature tensile tests, or impact tests at lower temperatures (–10 °C, –20 °C) may be agreed at the time of enquiry and order.
- Share
