JIS G3115 SPV450 Boiler & Pressure Vessel Steel Plate
JIS G3115 SPV450: High-Strength Pressure Vessel & Boiler Steel Data Sheet
Comprehensive datasheet for JIS G3115 SPV450 pressure vessel and boiler steel plate: chemical composition, mechanical properties, physical properties, international equivalents, and typical applications.
Hot rolling, normalizing, controlled rolling, quenching and tempering (optional)
- Phone : +8618037372205
- Email : [email protected]
- WhatsApp: Contact via Whtsapp
- WeChat: +8618037372205
JIS G3115 SPV450 Boiler & Pressure Vessel Steel Plate Introduction
JIS G3115 SPV450 is a high-strength carbon-manganese steel plate specifically designed for welded pressure vessels and boilers. It offers a minimum yield strength of 450 MPa for thicknesses up to 50 mm, combined with excellent weldability and good toughness at low temperatures.
- Standardized under JIS G3115, it is widely used in the fabrication of storage tanks, reactor shells, and heat exchangers in the petrochemical, power generation, and gas industries.
- The steel is typically supplied in the normalized or as-rolled condition, and can be further heat treated to meet specific toughness requirements.
- With controlled sulfur and phosphorus levels and optional microalloying, SPV450 provides a balanced combination of strength, ductility, and resistance to brittle fracture.
JIS G3115 SPV450 Boiler & Pressure Vessel Steel Plate Chemical Composition
The table below shows the maximum allowable limits for the main elements in SPV450 steel. The steel is a carbon-manganese grade with low sulfur and phosphorus to improve toughness and weldability. Microalloying elements such as Nb, V, or Ti may be added at the manufacturer's discretion to meet mechanical property requirements, but their contents are not specified in the standard.
| Element | Standard Value (max, wt%) | Remarks |
|---|---|---|
| Carbon (C) | 0.18 | |
| Silicon (Si) | 0.75 | |
| Manganese (Mn) | 1.60 | |
| Phosphorus (P) | 0.030 | |
| Sulfur (S) | 0.030 | |
| Others | - | Nb, V, Ti may be added as needed. Not specified in standard. |
JIS G3115 SPV450 Boiler & Pressure Vessel Steel Plate Thermal and Electrical Physical Properties
The physical properties listed below are typical for carbon-manganese steels of this grade. These values are not part of the JIS specification but are based on published data for similar materials and can be used for engineering calculations.
| Property | Typical Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.85 | g/cm³ (or 7850 kg/m³) | 20°C |
| Modulus of Elasticity (E) | 205 | GPa | 20°C |
| Shear Modulus (G) | 79 | GPa | 20°C |
| Poisson's Ratio (ν) | 0.3 | - | 20°C |
| Thermal Expansion Coefficient (α) | 11.5 × 10⁻⁶ | /K | 20–100°C |
| Thermal Conductivity (λ) | 53 | W/(m·K) | 100°C |
| Specific Heat Capacity | 460 | J/(kg·K) | 20–100°C |
| Electrical Resistivity (ρ_e) | 0.20 × 10⁻⁶ | Ω·m | 20°C |
JIS G3115 SPV450 Boiler & Pressure Vessel Steel Plate Mechanical Properties
The mechanical properties below are minimum required values according to JIS G3115, dependent on plate thickness. Yield strength is the lower yield point or 0.2% proof stress. Elongation is measured on two different specimen types (1A and No.10/No.14) for different thickness ranges. Impact tests are performed on Charpy V-notch specimens at 0°C.
| Property | Value | Unit | Test Condition (Plate Thickness t) |
|---|---|---|---|
| Yield Strength (ReH/Rp0.2) | ≥ 450 | MPa | t ≤ 50 mm |
| Yield Strength (ReH/Rp0.2) | ≥ 430 | MPa | 50 mm < t ≤ 100 mm |
| Yield Strength (ReH/Rp0.2) | ≥ 410 | MPa | 100 mm < t ≤ 200 mm |
| Tensile Strength (Rm) | 570 – 700 | MPa | All thicknesses |
| Elongation (A) | ≥ 19 | % | 1A specimen (G.L. 200 mm), t ≤ 50 mm |
| Elongation (A) | ≥ 26 | % | No.10 specimen (G.L. 50 mm), t ≤ 50 mm |
| Elongation (A) | ≥ 20 | % | No.10 specimen, 50 mm < t ≤ 100 mm |
| Elongation (A) | ≥ 26 | % | No.14 specimen (G.L. 50 mm), 50 mm < t ≤ 100 mm |
| Elongation (A) | ≥ 20 | % | No.10 specimen, 100 mm < t ≤ 200 mm |
| Elongation (A) | ≥ 26 | % | No.14 specimen, 100 mm < t ≤ 200 mm |
| Bend Test (180°) | d = 1.5a | - | t ≤ 25 mm (a = plate thickness) |
| Bend Test (180°) | d = 2.0a | - | 25 mm < t ≤ 50 mm |
| Bend Test (180°) | d = 2.0a | - | 50 mm < t ≤ 100 mm |
| Bend Test (180°) | d = 3.0a | - | 100 mm < t ≤ 200 mm |
| Charpy Impact Energy (KV) | ≥ 47 | J | 0°C, longitudinal, V-notch, t > 12 mm (by agreement) |
JIS G3115 SPV450 Boiler & Pressure Vessel Steel Plate Exact Equivalent Material Standards and Substitute Grades
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G3115 | SPV450 | Original grade |
| International | No exact ISO equivalent | - | Strength and chemistry do not match current ISO pressure vessel standards exactly. |
| Europe | EN 10028-3 | P460NH | Closest normalized grade; chemistry differs slightly |
| Europe | EN 10028-6 | P460Q | Quenched and tempered condition; equivalent for higher thickness |
| China | GB/T 713 | Q460R | Pressure vessel steel with similar strength range |
| USA | ASTM A537 | Class 2 | Quenched and tempered; minimum yield 415 MPa, tensile 550-690 MPa |
JIS G3115 SPV450 Boiler & Pressure Vessel Steel Plate Application Introduction
JIS G3115 SPV450 is primarily used in the construction of welded pressure vessels and boilers that require high strength and good low-temperature toughness. It is suitable for moderate service temperatures and can be used in sour service when specific hydrogen induced cracking (HIC) tests are agreed upon.
- The steel can be formed, welded, and machined using standard procedures; preheating may be required for thick sections or high restraint joints.
- Post-weld heat treatment (PWHT) is often applied to relieve residual stresses and restore toughness.
Product Applications: Boiler drums and shells, Vertical and horizontal pressure vessels, High-pressure storage spheres (LPG, ammonia), Heat exchanger shells and channel boxes, Process columns and towers
Processed into products: Shell plates and courses, Dished heads (hemispherical, ellipsoidal, torispherical), Tube sheets, Nozzle reinforcements and flanges, Support skirts and saddles, Baffle plates and internal trays
Application industries: Oil & Gas (refineries, storage tanks, separators), Petrochemical processing (reactors, columns), Power generation (boiler drums, superheater headers), Shipbuilding (LPG/chemical tankers), Pressure vessel and heat exchanger manufacturing
JIS G3115 SPV450 Boiler & Pressure Vessel Steel Plate Similar / Substitute Materials
| Country / Region | Standard | Grade | Remarks |
|---|---|---|---|
| Europe | EN 10028-3 | P460NH, P460NL1 | Normalized fine-grain steels; similar strength and application, common in pressure vessels |
| Europe | EN 10028-6 | P460Q, P460QH | Quenched and tempered; higher strength, often used for thicker sections |
| USA | ASTM A537 | Class 2 | Q&T; yield 415 MPa min, tensile 550-690 MPa; slightly lower strength but similar service |
| USA | ASTM A516 | Grade 70 | Normalized; yield 260 MPa only; used where lower strength is acceptable |
| China | GB/T 713 | Q460R | Similar pressure vessel grade; verify exact thickness range and impact requirements |
| ISO | ISO 9328-2 | P460NH, P460NL1 | International standard equivalents of EN 10028-3 |
Notes:
- For thicknesses above 200 mm, mechanical properties must be agreed between the purchaser and manufacturer. These values are not standardized.
- When the steel is used in sour or hydrogen service, supplementary requirements such as HIC and SSC tests can be specified as per NACE MR0175/ISO 15156.
- Normalizing is recommended for improved toughness; if the plate is supplied as-rolled, a subsequent normalizing heat treatment may be required by the fabrication code.
- Typical welding consumables: matching strength electrodes such as E7018 or submerged arc wire/flux combinations designed for 490 MPa class steels.
- Share
