JIS G3464 Rolled Steel Tube: A Comprehensive Guide
Introduction to JIS G3464 Rolled Steel Tube
JIS G3464 is a Japanese Industrial Standard that defines the specifications for seamless alloy steel tubes used for pressure purposes. These tubes are specifically designed to withstand high temperatures and pressures, making them suitable for applications in various industries. In this article, we will delve into the key aspects of JIS G3464 rolled steel tubes, including their material composition, specifications, chemical composition, mechanical properties, steel grades, and applications.
Material and Specifications
JIS G3464 rolled steel tubes are manufactured using an alloy steel composition to ensure high strength, corrosion resistance, and durability. The tubes are produced through a seamless process, which contributes to their reliability under extreme conditions. The standard outlines the following material and specifications for these tubes:
Chemical Composition
| Element | Composition Range (%) |
| Carbon (C) | 0.15 - 0.30 |
| Silicon (Si) | 0.50 max |
| Manganese (Mn) | 0.30 - 0.60 |
| Chromium (Cr) | 0.80 - 1.25 |
| Molybdenum (Mo) | 0.25 - 0.60 |
| Others | Trace amounts |
Mechanical Properties
| Property | Minimum Value |
| Tensile Strength | 440 MPa |
| Yield Strength | 245 MPa |
| Elongation | 25% |
| Hardness | 85 HRB |
Steel Grades
JIS G3464 defines several steel grades that adhere to specific chemical composition and mechanical property requirements. These grades ensure that the rolled steel tubes can effectively perform under different pressure and temperature conditions. Some common steel grades include:
STBL 380: This grade exhibits excellent high-temperature strength and is suitable for applications requiring reliable performance under elevated pressures.
STBL 450: With higher tensile and yield strength, this grade is ideal for applications involving more demanding pressure and temperature conditions.
STBL 690: Offering the highest tensile and yield strength among the grades, STBL 690 is used for the most extreme pressure environments.
Applications of JIS G3464 Rolled Steel Tubes
JIS G3464 rolled steel tubes find applications in various industries where high-temperature and high-pressure conditions are prevalent. Some notable applications include:
Boilers: The tubes are commonly used in boiler systems, where they serve as heat exchangers, carrying hot gases and steam.
Heat Exchangers: JIS G3464 tubes facilitate efficient heat transfer in heat exchanger units within industrial processes.
Power Generation: These tubes are integral components in power plants, helping to transport steam at high pressures to drive turbines.
Petroleum Refining: JIS G3464 tubes are used in refining processes, particularly in cracking units, where they handle high-temperature fluids.
Chemical Processing: Industries that deal with chemical reactions at elevated temperatures rely on these tubes for transporting reactive substances.
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