Difference between ASTM A53 pipe and ASTM A106 pipe

ASMT A53 Pipe and ASTM A106 Pipe are the most commonly used carbon steel pipe types in industry today, and they’re very similar.But the most important thing is to distinguish the differences between them.


ASTM A53 is Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless.

ASTM A106 is Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service.

We could see from the above the A53 is for both welded and seamless pipe but A106 for seamless type only.

ASTM A106 seamless steel pipes

ASTM A106 seamless steel pipes


A 53 can be welded seam or seamless depending on how it is specificed for purchase. It is a general steel pipe spec and covers galvanized pipe as well as black pipe. A106 is a similar pipe in chemical composition but is intened for high temperature service (up to 750 Degs F).

ASTM A53 Grade B seamless steel pipes

ASTM A53 Grade B seamless steel pipes

3.Chemical properties

There are different grades under ASTM A53 and A106.We take the most often used Grade B as example:

Firstly,A106-B contains silicon, min. 0.10% where A53-B has zero%, and silicon is the important element for improving the heat resistance criteria.

Secondly,A106-B contains manganese 0.29-1.06%, where A53-B 1.2%.

Thirdly,A106-B contains low sulfur and phosphorus, max. 0.035% where A53-B contains 0.05 and 0.045% respectively.

After reading this article,wish you could choose the right pipes to use.If you have any questions about this,contact Haihao Group for more professional advice.Email:sales@haihaogroup.com