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ASTM A312 304l Seamless Stainless Steel Pipe
Material and Specification
The ASTM A312 304l Seamless Stainless Steel Pipe is a high-quality pipe made from stainless steel grade 304l. ASTM A312 is the standard specification for seamless, welded, and heavily cold worked austenitic stainless steel pipes. It covers nominal pipe sizes ranging from 1/8" to 30" in diameter, with a wide range of options for various applications.
Key Features
The key features of the ASTM A312 304l seamless stainless steel pipe include:
- Seamless construction: The pipe is manufactured without any welding joints, ensuring its integrity and strength.
- Corrosion resistance: Grade 304l stainless steel offers excellent resistance to corrosion, making it suitable for various environments and industries.
- High temperature resistance: The pipe can withstand high temperatures and is commonly used in applications involving heat and pressure.
- Versatile applications: Due to its superior properties, this stainless steel pipe is used in various industries such as petrochemical, pharmaceutical, food processing, and more.
Chemical Composition
The chemical composition of the ASTM A312 304l seamless stainless steel pipe is as follows:
| Element | Composition |
|---|---|
| Carbon (C) | 0.03% max |
| Silicon (Si) | 0.75% max |
| Manganese (Mn) | 2.00% max |
| Phosphorus (P) | 0.045% max |
| Sulfur (S) | 0.030% max |
| Chromium (Cr) | 18.0 - 20.0% |
| Nickel (Ni) | 8.0 - 13.0% |
Mechanical Properties
The mechanical properties of the ASTM A312 304l seamless stainless steel pipe are as follows:
| Property | Value |
|---|---|
| Tensile Strength | 70 ksi (485 MPa) min |
| Yield Strength | 25 ksi (170 MPa) min |
| Elongation | 40% min |
| Hardness (Brinell) | 201 max |
| Hardness (Rockwell B) | 92 max |
Steel Grade
The steel grade for the ASTM A312 304l seamless stainless steel pipe is Type 304l. It is a low-carbon variation of Type 304, providing better resistance to sensitization during welding and reducing the risk of intergranular corrosion.
Application
The ASTM A312 304l seamless stainless steel pipe finds wide application in various industries, including:
- Petrochemical industry: Used for transporting corrosive fluids and gases.
- Pharmaceutical industry: Suitable for sanitary applications due to its corrosion resistance and ease of cleaning.
- Food processing industry: Ideal for conveying food products and beverages, ensuring hygiene and safety.
- Power generation: Used in heat exchangers and boilers due to its high-temperature resistance.
- Chemical industry: Suitable for applications involving the handling of acids, alkalis, and highly corrosive chemicals.
Possible Alternative Grades
While the ASTM A312 304l seamless stainless steel pipe is a versatile and widely used grade, there are alternative grades available depending on specific requirements. Some possible alternative grades include:
- ASTM A312 316l: Offers higher corrosion resistance and improved strength at elevated temperatures.
- ASTM A312 321: Provides excellent resistance to intergranular corrosion, particularly in high-temperature environments.
- ASTM A312 310: Suitable for high-temperature applications, with good resistance to oxidation and sulfidation.
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