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JIS G3463 stainless steel boiler and heat exchanger tubes
# JIS G3463 Stainless Steel Boiler and Heat Exchanger Tubes
## Introduction
JIS G3463 stainless steel tubing is specifically designed for applications requiring high heat exchange efficiency, such as boiler superheaters, heat exchangers, and condensers. This type of tubing is also commonly utilized in various chemical and petrochemical industries. It is important to note that these tubes are not intended for use in heating furnaces. The production methods include seamless steel pipes and welded stainless steel pipes, which can be manufactured using techniques like automatic arc welding, laser welding, or resistance welding.
The external dimensions of JIS G3463 boiler tubes range from 19.05mm to 168.3mm, with wall thicknesses varying between 2.0mm and 14mm. The standard length can reach up to 19,000mm. These specifications make them highly versatile for a variety of industrial applications where both internal and external heat exchange is critical.
## Chemical Composition of JIS G3463 Steel Tubing
Below is a detailed breakdown of the chemical composition for different grades of JIS G3463 steel tubes:
| Grade | C | Si | Mn | P | S | Ni | Cr | Mo |
|--------------|-------|-------|-------|-------|-------|---------|---------|-------|
| SUS 304TB | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.040| ≤0.030| 8.00~11.00 | 18.00~20.00 | - |
| SUS 304HTB | 0.04~0.10 | ≤0.75 | ≤2.00 | ≤0.040| ≤0.030| 8.00~11.00 | 18.00~20.00 | - |
| SUS 304LTB | ≤0.030 | ≤1.00 | ≤2.00 | ≤0.040| ≤0.030| 9.00~13.00 | 18.00~20.00 | - |
| SUS 309STB | ≤0.15 | ≤1.00 | ≤2.00 | ≤0.040| ≤0.030| 12.00~15.00 | 22.00~24.00 | - |
| SUS 310TB | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.040| ≤0.030| 12.00~15.00 | 22.00~24.00 | - |
| SUS 310STB | ≤0.15 | ≤1.50 | ≤2.00 | ≤0.040| ≤0.030| 19.00~22.00 | 24.00~26.00 | - |
| SUS 316TB | ≤0.08 | ≤1.50 | ≤2.00 | ≤0.040| ≤0.030| 19.00~22.00 | 24.00~26.00 | - |
| SUS 316HTB | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.040| ≤0.030| 10.00~14.00 | 16.00~18.00 | 2.00~3.00 |
| SUS 316LTB | 0.04~0.10 | ≤0.75 | ≤2.00 | ≤0.040| ≤0.030| 11.00~14.00 | 16.00~18.00 | 2.00~3.00 |
| SUS 316TiTB | ≤0.030 | ≤1.00 | ≤2.00 | ≤0.040| ≤0.030| 12.00~16.00 | 16.00~18.00 | 2.00~3.00 |
These compositions ensure that each grade offers unique mechanical properties tailored to specific industrial requirements.
## Mechanical Properties of JIS G3463 Steel Tubing
The mechanical properties of JIS G3463 steel tubes vary based on their grade and dimensions. Here’s an overview of some key mechanical properties:
| Grade | Tensile Strength (kgf/mm²) | Proof Stress (kgf/mm²) | Elongation (%) |
|--------------|----------------------------|-------------------------|----------------|
| SUS304TB | ≥53 | ≥21 | ≥35 |
| SUS304HTB | ≥53 | ≥21 | ≥35 |
| SUS304LTB | ≥49 | ≥18 | ≥35 |
| SUS309TB | ≥53 | ≥21 | ≥35 |
| SUS309STB | ≥53 | ≥21 | ≥35 |
| SUS310TB | ≥53 | ≥21 | ≥35 |
| SUS310STB | ≥53 | ≥21 | ≥35 |
| SUS316TB | ≥53 | ≥21 | ≥35 |
| SUS316HTB | ≥53 | ≥21 | ≥35 |
| SUS316LTB | ≥49 | ≥18 | ≥35 |
| SUS316TiTB | ≥53 | ≥21 | ≥35 |
These values indicate the robustness and reliability of JIS G3463 steel tubing under various operational conditions.
## Equivalent Steel Grades
To facilitate global usage and compatibility, JIS G3463 steel tubing has equivalents in other international standards. Below is a comparison table:
| JIS | ASTM/ASME | BS | DIN |
|------------------|--------------------|-----------------|--------------------|
| - | SA-213 T91 | - | 17175-X10CrMoVNb91 |
| G3463 SUS304TB | SA-213 Tp-304 | - | 17456 X2CrNi1911 |
| G3463 SUS304HTB | SA-213 Tp 304H | 3059 CFS304S51 | - |
| G3463 SUS316TB | SA-213 Tp 316 | - | 17456 X5CrNiMo17122|
| G3463 SUS316HTB | SA-213 Tp 316H | 3059 CFS316S51 | - |
| G3463 SUS321TB | SA-213 Tp 321 | - | 17456 X6CrNiTi1810 |
| G3463 SUS321HTB | SA-213 Tp 321H | 3059 CFS321S51 | - |
| G3463 SUS347TB | SA-213 Tp 347 | - | 17456 X5CrNiNB1810 |
| G3463 SUS347HTB | SA-213 Tp 347H | 3059 CFS347S51 | - |
This table highlights the global applicability and interchangeability of JIS G3463 steel tubing across different standards.
In conclusion, JIS G3463 stainless steel tubing represents a high-quality solution for demanding industrial applications requiring superior heat exchange capabilities. With its precise specifications and versatile chemical and mechanical properties, it remains a preferred choice among engineers and manufacturers worldwide.
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