BS 6323-8 LW12 LW19 LW20 LWCF20 LW21 Welded Stainless Steel Tubing: Longitudinally Welded Stainless Steel Tubes For Mechanical Applications
Introduction
BS 6323-8 LW12 LW19 LW20 LWCF20 LW21 is a British Standard that specifies the requirements for longitudinally welded stainless steel tubes for mechanical applications. This standard outlines the material specifications, key features, chemical composition, mechanical properties, steel grades, applications, and possible alternative grades for these welded stainless steel tubes.
Material Specification
BS 6323-8 LW12 LW19 LW20 LWCF20 LW21 specifies the material requirements for longitudinally welded stainless steel tubing. These tubes are manufactured using stainless steel, ensuring high corrosion resistance and durability. The standard provides specific requirements for the chemical composition and mechanical properties of the stainless steel used.
Key Features
The key features of BS 6323-8 LW12 LW19 LW20 LWCF20 LW21 welded stainless steel tubing include:
- Longitudinal Welding: The tubes are manufactured using a longitudinal welding process, ensuring a strong and continuous weld seam.
- Corrosion Resistance: The use of stainless steel in the manufacturing process provides excellent resistance to corrosion, making these tubes suitable for various environments.
- Mechanical Strength: The tubes exhibit high mechanical strength, enabling them to withstand heavy loads and mechanical stresses.
- Versatility: These tubes are suitable for a wide range of mechanical applications, offering flexibility in their usage.
Chemical Composition
| Element | LW12 (%) | LW19 (%) | LW20 (%) | LWCF20 (%) | LW21 (%) |
| Carbon (C) | 0.10 max | 0.10 max | 0.10 max | 0.10 max | 0.10 max |
| Manganese (Mn) | 1.00 max | 1.00 max | 1.00 max | 1.00 max | 1.00 max |
| Silicon (Si) | 1.00 max | 1.00 max | 1.00 max | 1.00 max | 1.00 max |
| Phosphorus (P) | 0.040 max | 0.040 max | 0.040 max | 0.040 max | 0.040 max |
| Sulfur (S) | 0.030 max | 0.030 max | 0.030 max | 0.030 max | 0.030 max |
| Chromium (Cr) | 11.5-13.5 | 17.0-19.0 | 19.0-21.0 | 19.0-21.0 | 20.0-22.0 |
| Nickel (Ni) | 0.50 max | 8.0-10.0 | 8.0-10.0 | 8.0-10.0 | 8.0-10.0 |
| Others | - | - | - | - | - |
Mechanical Properties
| Property | LW12 | LW19 | LW20 | LWCF20 | LW21 |
| Tensile Strength | 450-650 MPa | 450-650 MPa | 450-650 MPa | 450-650 MPa | 450-650 MPa |
| Yield Strength | 250 MPa min | 350 MPa min | 350 MPa min | 350 MPa min | 350 MPa min |
| Elongation | 25% min | 25% min | 25% min | 25% min | 25% min |
| Hardness (HV) | - | - | - | - | - |
Steel Grade
BS 6323-8 LW12 LW19 LW20 LWCF20 LW21 specifies different steel grades for longitudinally welded stainless steel tubing. These grades are designed to meet specific mechanical and chemical requirements, ensuring optimal performance in various applications.
Application
BS 6323-8 LW12 LW19 LW20 LWCF20 LW21 welded stainless steel tubing finds applications in a wide range of mechanical industries. Some common applications include:
- Automotive Industry: These tubes are used in exhaust systems, structural components, and other mechanical parts.
- Construction: They are utilized in the construction of bridges, buildings, and other infrastructure projects.
- Machinery: These tubes are suitable for manufacturing machinery components, such as conveyor systems, hydraulic cylinders, and more.
- Energy Sector: They find applications in the oil and gas industry, power plants, and renewable energy projects.
Possible Alternative Grades
While BS 6323-8 LW12 LW19 LW20 LWCF20 LW21 provides specific steel grades for welded stainless steel tubing, there may be alternative grades available in the market. These alternative grades may offer similar or enhanced properties, depending on the specific requirements of the application. It is recommended to consult with stainless steel suppliers or industry experts to explore possible alternative grades that meet the desired specifications.
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