×
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

Welding A350-LF3 with 309 consumables

Welding A350-LF3 with 309 consumables

Welding A350-LF3 with 309 consumables

(OP)
I need to weld A350-LF3 with a restriction of no FCAW. I am having a problem in finding consumables - EN-Ni3.

Does anyone see any reason why I could not qualify a PQR using 309 consumables? I already have a PQR qualified for welding LF3 to P8.

Any help would be appreciated.

RE: Welding A350-LF3 with 309 consumables

I have never seen this filler metal designation. What is the welding process you intend to use, is this for joining LF3 to itself or to stainless steel? There are a host of low alloy steel filler metals that contain up to 3% Ni for joining this material to itself.

RE: Welding A350-LF3 with 309 consumables

(OP)
Metengr,

The procedure is for welding LF3 to itself, however I am finding problems procuring EN-Ni3 consumables. If you have any alternate suggestions it would be greatly appreciated.

I am hoping to use GTAW - Root, SMAW or GMAW fill and SAW fill and cap.

Thanks

RE: Welding A350-LF3 with 309 consumables

E309 and ER309 are used in SMAW and TIG welding processes respectively.

If I understood your question you have a FCAW qualified welding process using EN-Ni3.

So you cannot use it for SMAW or TIG using E309 and ER309


Luis Marques

RE: Welding A350-LF3 with 309 consumables

If you cannot use FCAW, use SMAW and stick with low alloy, Ni filler metals.

RE: Welding A350-LF3 with 309 consumables

(OP)
Thanks Metengr,Looks like I have to search harder for the Ni consumables.

On a side note, do you know of any mechanical or metalurgical reason to stay away from the 309 scenario?

RE: Welding A350-LF3 with 309 consumables

Quote:

do you know of any mechanical or metalurgical reason to stay away from the 309 scenario?

No, not really. But why complicate your situation and avoid using typical low alloy filler metals for this? Keep in mind that inspection of the completed weld joint with 309 will require Liquid Penetrant versus magnetic particle, this has to be evaluated.

RE: Welding A350-LF3 with 309 consumables

iam42,
The highly dissimilar expansion rates of the 309 vs the 350-LF3 can place undue shear loads at the fusion line of the weld. Cyclic service life will be adversely affected depending on actual service conditions. A better choice would be to use a Nickel base alloy weld filler metal if matching filler metals are not available.  

RE: Welding A350-LF3 with 309 consumables

3 1/2% Ni solid wires (ER80S-Ni3) for GMAW, GTAW, and SAW can be hard to find.  You can get a custom consumable manufactuerer to make a metal cored wire for you that can be used for any of the 3 processes.  The matching SMAW elecrode is E7015-C2L or E8018-C2.  The mathing cored wire is ER80C-Ni3.  The matching FCAW consumable (which you can't use) is E80T5-Ni3, and is only made by a few companies.

RE: Welding A350-LF3 with 309 consumables

(OP)
Thanks GRoberts,


I am amazed at how difficult it is to find these consumables. I am originally from the UK and I would have no problems over there. Not sure why it is so difficult here.


 

RE: Welding A350-LF3 with 309 consumables

iam42,
The problem exists because so few vessels/piping are made from 3 1/2% Ni alloy steels. Manufacturers will not manufacture or stock large quantities when demand is negligible. We have recently made some weld repairs to 3 1/2% Ni alloy steel vessels, qualified welding procedures with GTAW and SMAW processes and had no major difficulty in obtaining them. For hard to find welding fillers, I first check with Bohler Welding and Midalloy.

RE: Welding A350-LF3 with 309 consumables

(OP)
Stanweld,

I tried Midalloy.......no luck! I will try bohler though.


Thanks

RE: Welding A350-LF3 with 309 consumables

We actually obtained these fillers this past July from Oxford, Champion and Universal Wire.

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