Carbon Steel (P-1),(P-?) etc. etc.

Date 09-22-2005 12:54

ASME Section IX groups materials by weldability characteristics. The system assigns the same P number to materials (ASME has evaluated) that have similar weldability.

P1 is the number for carbon steels
P8 is for stainless steels.

There are many others.

Charles

By jon20013 (*****)

Date 09-22-2005 14:06

chall is correct.

P-Numbers are the way ASME defines certain "Families" of alloys.

Find a copy of ASME Section IX and look up QW-420.1. Read the whole paragraph, this will help you understand. After you do that, look through the Tables of QW-422 and you will find more specific information about the P-Number you may be interested in.

Good luck, it's a long road understanding the codes, not necessarily difficult but one has to actually read them in order to gain an understanding of how they are structured and how to properly work with them.

It's a REALLY, REALLY good idea to THOROUGHLY read the "Introduction" part of the Code. This may be especially important with ASME Section IX.

By jerrykroll (**)

Date 09-22-2005 15:06

as F-No's represent similar Filler (F) metals,

as A-No's represent similar chemical Analysis (A)

P-No's represent metals that are welded with a similar Procedure (P)

By Jamiegh Date 09-22-2005 20:34

Thank you gentleman for the responces you have been very helpfull. This site has turned out to be a great source of information.