JIS G3457 STPY400 Welded Steel Tube ARC Welded Carbon Steel Pipes For General Purpose
JIS G3457 STPY400 Welded Steel Tube
ARC Welded Carbon Steel Pipes for General Purpose
Material
JIS G3457 STPY400 is a specification for welded carbon steel pipes designed for general-purpose applications. These pipes are primarily used in various industries due to their excellent mechanical properties and weldability.
Specification
The specification outlines the requirements for the manufacture of welded steel tubes, including dimensions, tolerances, and testing methods. The STPY400 grade is particularly noted for its strength and durability.
Key Features
- Weldability: Designed for easy welding, making it suitable for various applications.
- Strength: Offers high tensile strength and yield strength.
- Corrosion Resistance: Provides moderate resistance to corrosion, suitable for various environments.
- Versatility: Applicable in multiple industries, including construction, automotive, and manufacturing.
Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.18 - 0.24 |
| Manganese (Mn) | 0.60 - 0.90 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Silicon (Si) | ≤ 0.40 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 245 |
| Tensile Strength (MPa) | ≥ 400 |
| Elongation (%) | ≥ 20 |
| Hardness (HB) | ≤ 160 |
Steel Grade
The STPY400 grade is recognized for its balance of strength and ductility, making it suitable for various applications where moderate strength is required.
Application
JIS G3457 STPY400 welded steel tubes are commonly used in:
- Construction and structural applications
- Automotive components
- Machinery and equipment manufacturing
- General piping systems
Possible Alternative Grades
While STPY400 is widely used, there are alternative grades that may be considered based on specific requirements:
- STPY410: Offers higher strength and is suitable for more demanding applications.
- STPY450: Provides enhanced mechanical properties for heavy-duty applications.
- ASTM A53: A common alternative in North America with similar applications.
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