×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Hardenability for Coupling 3-1/2" L80 13 Cr. material

Hardenability for Coupling 3-1/2" L80 13 Cr. material

Hardenability for Coupling 3-1/2" L80 13 Cr. material

(OP)
Please can somebody tell me about hardenability requirement as per API 5CT for Coupling 3-1/2" L-80 13Cr material.

We have received hardness report after tempering, but hardenabilty hardness values for as quenched condition are not mentioned in MTC. As per my interpretation with code, hardenabilty test to be carried out.(Reference API 5CT, clause 7.10.2)
We have raised discrepancy about this and conveyed to manufactuer.
But manufacturer clarifies that hardeneability requirement is not mandatory.

Regards

RE: Hardenability for Coupling 3-1/2" L80 13 Cr. material

There was no hardenability requirement as originally written and as stated in the 5ed. 1995 (I admit to being obsolete). The hardenability requirement should only refer to C90 and T95; low alloy steels expected to be used in sour service (where hardenability is important).Maybe the spec has been screwed-up in later revisions.
L80 13Cr has very high hardenability and will absolutely pass the (original) 90% martenstite requirement.  

RE: Hardenability for Coupling 3-1/2" L80 13 Cr. material

(OP)
Blacksmith thank you for your input.
Kindly note that our coupling falls under PSL-2 & advise me on hardenability requirement for PSL-2 product.

RE: Hardenability for Coupling 3-1/2" L80 13 Cr. material

The hardneability requirement in 7.10.2 is mandatory, but it only required for each OD, weight, steel grade (chemistry), and austenitize/quench combination.  What this means is the manufacturer only has to have documentation that the particular OD size - wall - steel chemistry - and process parameters was tested and met the as-quenched hardness requirements specified, usually as part of their process qualification.  

It is not required that this test be performed (or reported) on a per heat or per lot basis for L-80 13Cr.  This is probably what your manufacturer meant when he said it was not mandatory.  It is mandatory that they perform the test and meet the requirement.  It is not mandatory to report the results with the certification package. In addtion, a qualification test performed 10 years ago (or more) is still valid as long as the steel chemistry spedification is the same and the austenitize/quench parameters are the same.

If pressed, the manufacturer should show you the results of this qualification.  Since it is a part of their process control procedure, however, they may tell you that is only available for on-site review, that is, they probably will not send you a copy, you would have to go to their plant to see it (during a quality audit, for example).  Incidentally, for 13Cr material, this is a slam-dunk reqruirement.  

rp

RE: Hardenability for Coupling 3-1/2" L80 13 Cr. material

(OP)
Thanks for your advice.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources