E355 Pipe

The technical delivery conditions specified by EN 10297 apply to non-alloy as well as alloy steels seamless circular tubes. The tubes produced under standard EN 10297-1 are intended for use in both mechanical and general engineering applications. Like most English standards, the steels used in standard EN 10297 are designated on the basis of product application, or delivery condition. The designations of the steel grade for an EN 10297 Tube also makes a mention of its minimum yield strength. In the case of pipes belonging to grade en 10297-1 e355+ar, the letter E is a designation for steels applied in the manufacture of machine parts. And the term AR indicates that there is not heat treatment required for that particular steel grade. For instance, the minimum yield strength of bs en 10297-1 grade e355 is 355 N/mm2.
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