JIS G3466 Cold Finished Seamless Carbon Steel Tubes For Machine Structural Purpose
JIS G3466 Cold Finished Seamless Carbon Steel Tubes For Machine Structural Purpose
Introduction
JIS G3466 is a Japanese industrial standard that specifies the requirements for cold finished seamless carbon steel tubes used in machine structural applications. These tubes are designed to provide high-strength and durability, making them suitable for various machine components and structural purposes. This article provides an overview of the material, specifications, chemical composition, mechanical properties, steel grade, and applications of JIS G3466 tubes.
Material and Specification
JIS G3466 specifies the material and dimensional requirements for cold finished seamless carbon steel tubes. The standard covers various sizes, dimensions, and thicknesses to cater to different structural applications. The material used in the manufacturing of these tubes is carbon steel, which offers excellent mechanical properties and weldability.
Chemical Composition
The chemical composition of JIS G3466 tubes is crucial in determining their mechanical properties and overall performance. The table below outlines the typical chemical composition of these carbon steel tubes.
| Element | Composition Range (%) |
|---|---|
| Carbon (C) | 0.22 - 0.25 |
| Silicon (Si) | 0.15 - 0.35 |
| Manganese (Mn) | 0.30 - 0.90 |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.040 max |
Mechanical Properties
The mechanical properties of JIS G3466 tubes determine their strength, ductility, and ability to withstand various loads. The table below presents the typical mechanical properties of these carbon steel tubes.
| Property | Value |
|---|---|
| Tensile Strength | 400 MPa min |
| Yield Strength | 245 MPa min |
| Elongation | 23% min |
| Hardness (HB) | 143 max |
| Impact Strength | 27 J min |
Steel Grade
JIS G3466 tubes are available in different steel grades, each with specific chemical compositions and mechanical properties. The most commonly used steel grades are:
- STKR400: This grade has a minimum tensile strength of 400 MPa and a yield strength of 245 MPa. It offers good weldability and is suitable for general machine structural applications.
- STKR490: This grade has a minimum tensile strength of 490 MPa and a yield strength of 325 MPa. It provides higher strength compared to STKR400 and is suitable for applications requiring increased structural integrity.
Application
JIS G3466 cold finished seamless carbon steel tubes find wide application in various machine structural components. These tubes are commonly used in the manufacturing of:
- Machinery frames
- Automotive parts
- Agricultural equipment
- Construction machinery
- Industrial equipment
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