Additional elements in steel pipe

Lots of additional elements would be added in various steel pipes like seamless steel pipe, ERW steel pipe, SSAW steel pipe and so on. According to the supplier of steel pipe, Threewaysteel tell us that it is an art by adding additional elements in steel pipe because:

It would affect the character of corrosion resistance. We should clear that lots of steel pipe would add additional elements like Mn, Si, and so on. However, we should get the percentage for it. For example, there is a limit for the additional elements of Seamless Steel Pipe EN 10216:

What’s more, it would have influence on steel pipe’s strength and toughness. For example, large quantities of niobium, titanium or vanadium are forming fine carbides or carbonitrides in the steel pipe, which makes the steel pipe losing the strength and toughness of the coarse ferrite grains and of the progressive steel.