Description
JIS G3461
JIS G3461 is a Japanese Industrial Standard that covers seamless carbon steel tubes primarily used in boilers, heat exchangers, and similar high-temperature, high-pressure applications.
Standard Overview
| Standard Code | JIS G3461 |
|---|---|
| Usage | Heat exchangers, boilers, condensers |
| Material | Carbon Steel |
| Product Type | Seamless Tubes |
JIS G3461 Available Grades and Their Equivalents
| Grade | Approximate Equivalent | Key Characteristics |
|---|---|---|
| STB340 | Comparable to ASTM A179 | Ideal for low-pressure, low-temperature environments |
| STB410 | Similar to ASTM A210 Gr.A1 | Suitable for medium pressure and temperature ranges |
| STB510 | Matches ASTM A210 Gr.C | Designed for higher pressure and elevated temperatures |
Chemical Composition
| Grade | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| STB340 | ≤ 0.18 | ≤ 0.35 | ≤ 0.60 | ≤ 0.035 | ≤ 0.035 |
| STB410 | ≤ 0.23 | ≤ 0.35 | ≤ 0.90 | ≤ 0.035 | ≤ 0.035 |
| STB510 | ≤ 0.30 | ≤ 0.35 | ≤ 1.20 | ≤ 0.035 | ≤ 0.035 |
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| STB340 | ≥ 340 | ≥ 175 | ≥ 30 |
| STB410 | ≥ 410 | ≥ 205 | ≥ 25 |
| STB510 | ≥ 510 | ≥ 245 | ≥ 20 |
Key Features
- Excellent weldability and workability
- High thermal efficiency
- Reliable under thermal cycling
- Supplied as seamless tubes for added strength
Common Applications
- Boiler tube systems
- Heat exchanger piping
- Condensers
- Economizers and superheaters
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