Smoothing-Austenitic, SA tubes for short, are the tubes for general production purpose. A decent example of this strength is represented in the polycrystalline tubes which have no rusting, not at all subject to high shearing stress, and maintain high temperatures as well as pressures. In this article, we’ll be looking at four types of SA tubes: tubes’ advantages and features will be detailed in this post to make the right decision when selecting the proper heat exchanger for your boiler system.

1. SA213 T11

The SA213 T11 grade is highly priced by boiler tube manufacturers in India. This ferritic alloy welded tube is designed for use in a high-temperature operation state, which is commonly found in boilers and heat exchangers. As its creep strength is high and it can work continuously at temperature up to 1200°F (649°C) which is the highest permissible temperature for alloy steel. So, SA213 T11 is very suitable for operating superheaters and reheating devices.

Being the fact that chromium and molybdenum are added to this alloy, it is made more resistant to oxidation, making it capable of working in either steam or no steam environments.

2. SA213 T22

Apart from that, a very popular one is the SA213 T22 boiler tube. The nickel-base superalloy is not far away from SA213 T11 in performance, but it additionally has higher creep strength and thermal oxidation resistance. Since then, SA213 T22 has received more chromium and molybdenum and is able to endure temperatures up to 1100 degrees Fahrenheit (593 degrees Celsius). It is also ideal for short-term service up to 1200°F (649°C).

SA213 T22 is the favorite in superheaters, reheaters, and other high-temperature boil room parts, making it the proper choice for power generation as well as for industries.

3. SA213 T91

There is a need for a material that can also safely prove high-temperature applications. The answer is the SA213 T91, which is an amazing choice. The seamless ferritic alloy steel tube has a 9% chromium and 1% molybdenum composition. These elements provide superb creep strength and high resistance to oxidation at temperatures up to 1200o F (649o C).

SA213 T91 is the pack in supercritical boilers, where materials with higher endurance abilities are employed due to high pressure and temperature situations. The combination of its great mechanical features and heat sturdiness makes it preferred for modern thermal power plants.

4. SA178 Grade A

Tube SA178 Grade A is a carbon steel heat exchanger tube that is widely used in low-pressure boiler applications. This tube is characterized as seamless and has features of good weldability, formation ability, and moderate strength. SA178 Grade A is good for a service temperature of a maximum of 850 degrees F (454 degrees C). It is widespread in economizers, feedwater heaters, and lower-pressure boiler components and tubes.

Its low cost and easy-to-fabricate nature make it a primary choice among boiler manufacturers and end-users.


Being knowledgeable about the types of SA category boiler tubes is actually for the main reason for you to be able to choose the one that is most right for your particular application. The SA category tubing can provide you with the high-temperature resistant, creep-proof or the cost-effective tubing as you need. When seeking the best boiler tubes manufacturer in India, Vishal Steel India can count among the best boiler tube producers in India and can be your go-to choice.

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