Description
JIS G3115 Pressure vessel steel plates
JIS G3115 is a Japanese Industrial Standard (JIS) that specifies steel plates for pressure vessels used at intermediate and high temperatures. This standard covers hot-rolled steel plates designed for welded pressure vessels.
Key Features
- Application: Used in boilers and pressure vessels operating at elevated temperatures.
- Grades: Common steel grades under JIS G3115 include:
- SPV235 (low strength)
- SPV315 (medium strength)
- SPV355 (higher strength)
- SPV410, SPV450, SPV490 (higher grades with increased strength and heat resistance)
- Manufacturing Process: Hot-rolled
- Properties: Good weldability, high-temperature strength, and resistance to pressure-related stresses.
JIS G3115 Dimensions
- Thickness: 5–300 mm
- Width: 1500–4500 mm
- Length: 3000–18800 mm
JIS G3115 Chemical Composition
| Grade |
C (Max) |
Si |
Mn |
P (Max) |
S (Max) |
Mo (Max) |
Cu (Max) |
Ni (Max) |
Cr (Max) |
| SPV235 |
0.18 |
0.15–0.40 |
0.35–0.90 |
0.030 |
0.030 |
— |
0.30 |
0.30 |
0.30 |
| SPV315 |
0.20 |
0.15–0.40 |
0.40–1.00 |
0.030 |
0.030 |
— |
0.30 |
0.30 |
0.30 |
| SPV355 |
0.20 |
0.15–0.55 |
0.40–1.20 |
0.030 |
0.030 |
— |
0.30 |
0.30 |
0.30 |
| SPV410 |
0.22 |
0.15–0.55 |
0.40–1.40 |
0.025 |
0.025 |
0.35 |
0.30 |
0.30 |
0.30 |
| SPV450 |
0.23 |
0.15–0.55 |
0.60–1.50 |
0.025 |
0.025 |
0.45 |
0.30 |
0.30 |
0.30 |
JIS G3115 Mechanical Properties
| Grade |
Yield Strength (MPa) |
Tensile Strength (MPa) |
Elongation (%) |
| SPV235 |
≥235 |
400–510 |
≥22 |
| SPV315 |
≥315 |
490–610 |
≥21 |
| SPV355 |
≥355 |
510–640 |
≥20 |
| SPV410 |
≥410 |
590–720 |
≥19 |
| SPV450 |
≥450 |
620–760 |
≥18 |
JIS G3115 Physical Properties
| Property |
Value |
| Density (g/cm³) |
7.85 |
| Melting Point (°C) |
1420–1460 |
| Thermal Conductivity (W/m·K) |
45.0 |
| Specific Heat (J/kg·K) |
480 |
| Electrical Resistivity (Ω·m) |
1.59 × 10⁻⁷ |
Application
- Pressure Vessels – Used in manufacturing boilers, storage tanks, and pressure vessels for high-temperature environments.
- Heat Exchangers – Suitable for heat exchangers in power plants and chemical industries.
- Oil & Gas Industry – Used in refining equipment, gas processing plants, and petrochemical applications.
- Steam Boilers – Ideal for fabricating steam boilers due to its heat-resistant properties.
- Chemical Processing Plants – Applied in reactors, distillation towers, and chemical storage tanks.
- Power Plants – Utilized in high-temperature and high-pressure applications such as boiler drums and piping systems.
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