API Q125 - what does it mean?

k_amy21

Hi,

can someone please clarify me what does the standard "API Q125" in material designation mean?
Does it stand for one particular steel grade or it has something to the with physical properties?
And what does this "Q125" exactly means?

Thank you.


Regards
Amy

chemisttree

Q125 is the API standard number.

k_amy21

thank you, chemisttree, for your answer.

do you prehaps know where can I find it´s chemical and physical properties? I´ve tried searching all over the internet, but I couldn´t find anything.
I would appreciate it very much..

Q_Goest

Looks like the API standard is 5AQ. The Q125 is probably something listed in the spec. But 5AQ is no longer being used. IHS states:
SPECIFICATION FOR Q125 CASING (COMBINED WITH SPEC 5A, 5AC, AND 5AX INTO SPEC 5CT-88)

Note that the -88 on API 5CT-88 is just the year of publication so look for API 5CT instead. API 5CT comes up as active. You can Google that here:
http://www.google.com/#hl=en&safe=ac...w=1280&bih=901

EDIT: Just to clarify, if you have some old Q125 casing built to API 5AQ and you need the chemical and physical properties, you have to purchase the defunct spec from IHS or whoever you get your industry standards through. If you're looking for those properties because you need the casing for a new project, use API 5CT. Hope that isn't too confusing!

SteamKing

In the catalog at the following link:

http://www.voestalpine.com/tubulars/...05-2010_SC.pdf

there are appendices which contain various physical and chemical properties for the various grades of API 5CT tubulars (including Grade Q125).

There is also a draft standard for API 5CT at the following link:
http://ballots.api.org/ecs/sc5/ballots/docs/5CT_na.pdf

The information in this draft standard is of course unofficial.