ASTM A213 T91 Seamless tubes

What is SA 213 t91 tube?

The SA 213 T91 material is a ferritic-martensitic steel micro-alloy that has controlled nitrogen content in its composition. The cold-drawn and hot-finished SA 213 T91 Tube are available in different sizes that can go up to 100mm wall thickness. The SA 213 T91 Tube also possesses excellent tensile properties and good machinability. The ASTM A213 T91 Seamless Tube is also known for its high weldability, which can easily be welded using different methods. The UNS K91560 T91 Boiler Tube is primarily used for various high-temperature applications, including superheaters and heat exchangers. The abrasion resistance property of the A213 T91 Hot Finished Tube makes it popular among multiple industries. The SA 213 T91 Heat Exchanger Tube can also withstand high temperature and pressure environments.

They have improved mechanical qualities by layout. The SA213-T9 alloy steel tube has a required yield strength of 205Mpa as well as a minimum tensile strength of at least 415Mpa. A seamless tube is stronger than welded pipes because it is produced from a single piece of steel rather than two.

sa 213 t91 tube property

Sa213 t91 vs t22

The trade name for t91 tubes is UNS K90901, whereas the brand name for t22 pipes is UNS K21590.
The distinction is only due to the elemental makeup of it. In comparison to UNS K21590 alloy steel seamless boiler tube, UNS K90901 alloy steel seamless boiler tube contains less silicon, phosphorus, and Sulphur. In contrast to SA213 T22 material- SA213 T91 material contains trace amounts of extra nickel. In comparison to SA 213 T91 Boiler Tube- SA213 T91 Boiler Tube contains more chromium and molybdenum.

Both classes have roughly the same amount of carbon.

What is the temperature range of sa213 t91 boiler tube?

The A213 T91 Hot Finished Tube is intended for use in situations that demand tolerance to high temperatures and high pressures. Such pipes could be found with a length of up to 22.5 meters and are processed at temperatures exceeding 2000 degrees Celsius. High-quality components are utilized to construct the SA 213 T91 Heat Exchanger Tube so that it can withstand high tension and temperatures.The SA 213 T91 Low Alloy Steel Round Tubes are Suitable for Use Permanently in Installations With heat Up To 590°C. Alloy SA213 T91 can be used to refine precision mechanical tubes. Over 2000° Celsius is used to process these pipes.

Pros and cons of sa213 t91 material

The following benefits of T91 steel’s efficiency make it popular for usage in high-parameter high heat power generating units:

  • Steel has a low-temperature expansion coefficient & high heat conductivity when related to stainless steel.
  • At room temp, the alloy has excellent tensile strength, and it also has high plasticity.
  • As is common knowledge, everything that has benefits also has drawbacks. The ASME SA213 T91 Seamless Tubing is also vulnerable to leaks. Long-term excessive heat (LTO-C) damage and steam are the main factors in T91 SH/RH tube problems. During the hot rolling & cold drawing processes, the innermost layer of the metal pipe creates a lengthwise linear flaw.