P No and G No

By hasway Date 08-31-2007 04:46

Dear Expert,

I am a newbie in this field (welding) and I would like to know what are the criterias such that few different materials could be group together as one P no, and how's to split it further in G no.

thanks and appreciate your feedback.

By Tommyjoking (****)

Date 08-31-2007 08:36

Huh? don't feel newbie man I been doing this all my life and I don't know what ur talking about

By hasway Date 08-31-2007 11:36

Gee, may be I post in the wrong forum. The P no. and G no. is the items in the WPS (QW-403??), and also in ASME X. I am not really sure whether you guys really discuss ASME items or may be it's just limited to AWS only.

thanks

By jwright650 (*****)

Date 08-31-2007 11:55

Ask away in here! That what this place is for....Hopefully the guys who deal more with materials listed in ASME will chime in soon.

By Tommyjoking (****)

Date 08-31-2007 11:55

no there are many here who are very asme literate....just because I am a dummy don't mean your question won't get answered LOL give em a chance to get a cup a coffee and get woke up.

By jon20013 (*****)

Date 08-31-2007 11:55

P Numbers are an ASME number system, as are Group numbers. Steels and Steel Alloys are included within P or S# 1 - P or S# 11. Note the new term, "S" Number... S numbers are "basically" P Number materials but may not be approved for use in all ASME Codes. Group numbers, in the most basic terms, differentiate tensile strengths and chemistry. Reference ASME IX, QW-420 for a better definition than I'm able to provide here.

In a nutshell; P-Numbers are grouped into alloy "families."

Hope this helps?