JIS G3446 SUS303TKA Austenitic Stainless Steel Tubes For Machine And Structural Purposes
JIS G3446 SUS303TKA SUS304TKA SUS304LTKA SUS316TKA SUS316LTKA Austenitic Stainless Steel Tubes For Machine And Structural Purposes
Material
Austenitic stainless steels are known for their excellent corrosion resistance, high strength, and good formability. The grades SUS303TKA, SUS304TKA, SUS304LTKA, SUS316TKA, and SUS316LTKA are specifically designed for various machine and structural applications. These materials are commonly used in industries such as food processing, chemical processing, and construction due to their durability and resistance to harsh environments.
Specification
The specifications for these stainless steel tubes are outlined in the JIS G3446 standard, which provides guidelines for the manufacturing and testing of stainless steel tubes used in various applications. The tubes are available in different sizes and thicknesses to meet specific requirements.
Chemical Composition
The following table presents the chemical composition of the specified stainless steel grades:
| Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) |
|---|---|---|---|---|---|---|---|---|
| SUS303TKA | 0.15 | 1.00 | 2.00 | 0.045 | 0.030 | 17.00 | 8.00 | - |
| SUS304TKA | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 18.00 | 8.00 | - |
| SUS304LTKA | 0.03 | 1.00 | 2.00 | 0.045 | 0.030 | 18.00 | 8.00 | - |
| SUS316TKA | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 16.00 | 10.00 | 2.00 |
| SUS316LTKA | 0.03 | 1.00 | 2.00 | 0.045 | 0.030 | 16.00 | 10.00 | 2.00 |
Mechanical Properties
The mechanical properties of the specified stainless steel grades are summarized in the following table:
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| SUS303TKA | 205 | 515 | 40 | 90 |
| SUS304TKA | 215 | 505 | 40 | 90 |
| SUS304LTKA | 215 | 505 | 45 | 85 |
| SUS316TKA | 210 | 580 | 40 | 95 |
| SUS316LTKA | 210 | 580 | 45 | 90 |
Application
The SUS303TKA, SUS304TKA, SUS304LTKA, SUS316TKA, and SUS316LTKA stainless steel tubes are widely used in various applications, including:
- Food Processing Equipment: Due to their corrosion resistance and hygienic properties.
- Chemical Processing: For handling aggressive chemicals and environments.
- Construction: Used in structural applications where strength and durability are required.
- Marine Applications: Particularly SUS316 grades, which offer enhanced resistance to seawater corrosion.
- Automotive: Components that require high strength and resistance to oxidation.
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