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ASTM A269 is a widely recognized standard for seamless and welded austenitic stainless steel tubing used in various industries. One specific alloy, type 347 stainless steel, stands out due to its unique properties. This alloy contains niobium, which enhances its strength at high temperatures and improves resistance against intergranular corrosion. Thus, ASTM A269 type 347 stainless steel tubes are manufactured in accordance with these standards and are constructed using the 347 stainless steel alloy. These tubes find extensive use in industries that demand both elevated temperature endurance and resistance to corrosion.
TP347 stainless steel tubes are versatile and find applications across a broad range of industries. They are particularly suitable for high-temperature equipment, such as furnaces and boilers, where their superior strength enables them to withstand extreme thermal stresses. Additionally, their resistance to corrosion makes them a reliable choice for chemical processing plants and aerospace components. Moreover, TP347 stainless steel tubes are also employed in exhaust systems, where they can withstand the harsh conditions associated with combustion and exhaust gases.
Overall, ASTM A269 type 347 stainless steel tubes are highly sought-after for their exceptional combination of high-temperature strength, resistance to intergranular corrosion, and versatility across multiple industries.
- For general service, ASTM A269 lays out the standard specification for seamless and welded austenitic stainless steel tubing. The goal of this specification is to ensure that this type of tubing meets the necessary requirements for general use. Austenitic stainless steel is known for its high levels of corrosion resistance and strength, making it an ideal choice for tubing applications. This particular specification applies to both seamless and welded tubing, ensuring that the finished product is durable and able to withstand the demands placed upon it. When it comes to selecting the right tubing for a specific application, this standard provides a valuable point of reference.
- The ASTM A249 is a standard that specifies the requirements for welded austenitic steel tubes used in various applications such as boilers, superheaters, heat exchangers, and condensers. The tubes need to be strong and durable to withstand high temperatures and pressure conditions. The standard outlines the chemical composition, mechanical properties, and dimensional requirements for these tubes. It is essential to comply with this standard to ensure that the tubes meet the necessary safety and performance requirements.
- Our suppliers, who specialize in 347 stainless steel, offer a wide range of forms for your convenience. In addition to stainless steel 347 tubes, we also provide various other products, including 347 stainless steel Fittings, Flanges, Forgings, Fasteners, Pipes, Plates, Sheets, Strips, Coils, Bars, and Round Rods. You can count on us to provide high-quality stainless steel in the form that best suits your needs. Whether you're looking for tubing, fasteners, or plates, we aim to provide the best products and service possible to meet your specifications. Contact us today to learn more about our available products.

347 SS Tubing Chemical Composition:
- Chromium (Cr): 17-20%
- Nickel (Ni): 9-13%
- Manganese (Mn): 2% (max)
- Silicon (Si): 0.75% (max)
- Carbon (C): 0.08% (max)
- Phosphorus (P): 0.045% (max)
- Sulfur (S): 0.03% (max)
- Niobium (Nb): 10xC - 1.10% (max)
The ASME SA269 Stainless Steel 347 Tube is known for its exceptional corrosion resistance. It has been designed to withstand harsh environments and can resist corrosion caused by various factors such as chemicals, humidity, and high temperatures. This stainless steel tube is perfect for various industrial applications that require resistance to corrosion. It is made of high-quality materials that guarantee durability and longevity, allowing it to withstand the test of time in any harsh environment. Choose the ASME SA269 Stainless Steel 347 Tube for its remarkable corrosion resistance properties and enjoy its long-lasting service.
The corrosion resistance of 347 stainless steel is outstanding in a variety of environments. It possesses impressive intergranular corrosion resistance, particularly in sensitized situations. Additionally, this type of steel has good resistance to general corrosion caused by a variety of organic and inorganic acids, including sulfuric, acetic, and phosphoric acids.
The high-temperature performance of ASTM A269 347 Stainless Steel Tubing is a key feature that makes it stand out in the market. This tubing is designed to withstand extreme temperatures without compromising its structural integrity or chemical properties.
Thanks to its unique composition, ASTM A269 347 Stainless Steel Tubing offers excellent resistance to corrosion, oxidation, and heat. This makes it an excellent choice for high-temperature applications, such as nuclear power plants, chemical processing plants, petrochemical facilities, and more.
Whether you need tubing for use in aggressive environments or extreme temperatures, ASTM A269 347 Stainless Steel Tubing is the perfect choice. It has been tested and proven to deliver reliable performance even in the harshest operating conditions.
Overall, if you are looking for a tubing solution that offers outstanding performance and long-lasting durability, ASTM A269 347 Stainless Steel Tubing is definitely worth considering. With its exceptional high-temperature performance and superior corrosion resistance, it is sure to meet your needs and exceed your expectations.
With its exceptional resistance to oxidation and impressive high-temperature strength, 347 stainless steel has earned a notable reputation. Its mechanical properties remain intact even when subjected to long-term exposure to temperatures as high as 800°C (1470°F). By incorporating niobium, this material becomes even more stable and prevents sensitization and the formation of carbides.
Typical Values Of Mechanical Properties of Type 347 Stainless Steel Tube:
- Tensile Strength: 515 MPa (75,000 psi) at room temperature
- Yield Strength: 205 MPa (30,000 psi) at room temperature
- Elongation: 40% (50 mm) at room temperature
- Hardness: Brinell hardness is about 160 (changes with heat treatment)
UNS S34700 Stainless Steel Weldability:
Stainless steel 347 exhibits good weldability using common welding techniques such as GTAW (TIG), GMAW (MIG/MAG), and SMAW (electrode). However, it is important to use a proper welding process to avoid sensitization and intergranular corrosion. Post-weld heat treatment may be required to restore corrosion resistance in the heat-affected zone.
1.4550 Stainless Steel Surface Finish:
ASTM A269 specifies that tubing should have a smooth finish. Common surface treatments include annealing pickling, bright annealing, and polishing.
347 Stainless Steel Tube Suppliers in Stock:
| SS 347 Sanitary Tubes | SS 347 Polished Tubes |
| SS 347 Instrumentation Tubes | SS Heat Exchanger Tubes |
| SS 347 Bright Annealed Tubing | Stainless Steel Seamless 347 Tubing |
| SS 347 Decorative Tube | Stainless Steel 347 pipe |
| SS 347 Welded Tubes | SS 347 Round Tube |
| Stainless Steel welded 347 round tubes | SS 347 Seamless Tubes |
| SS 347 Square Tubing | SS 347 Rectangular Tubing |
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