As per my opinion,
1. check the ferrite number of the base metal.
2.Select a consumable batch having a ferrite number such that the average ferrite number of the base metal and the consumable is with in the range what required for you. Normally after welding an average ferrite number will be in the weld.
3. Do a sample weld and check the ferrite number.
4. For the same manufacturer and brand name there will be slight variations in the ferrite number. So check the batch certificate and select a batch having a low ferrite number. Also do a small weld pad and check whether the ferrite number you are getting (Using your ferrite meter) is same as in batch certificate.
5. Also keep the heat input to the minimum possible and keep the cooling rate to the minimum possible.
On Sun, Aug 25, 2013 at 8:10 PM, Prakash Hegde <pb.hegde@yahoo.com> wrote:
Dear Mr Ankiti) The weld ment Ferrite to be checked after final Weld However the depth at which the ferrite to be checked depends upon spec requirementii) For to get Ferrite between 2-5 is very low hence generaly Nil Ferrite consumables are to be used (also Basic coated electrodes are being used) where you require to take extra precaution during welding to avoid Hot Crack(Shrinkage Crack)RegardsHegde P.B.From: Ankit PAtel <ankit.patel@orientalindia.net>ence
To: materials-welding@googlegroups.com
Sent: Saturday, 24 August 2013 6:00 PM
Subject: [MW:18506] Ferrite Content Check on root or final weld-- To post to this group, send email to materials-welding@googlegroups.comTo unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.comFor more options, visit this group's bolg at http://materials-welding.blogspot.com/http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.--- You received this message because you are subscribed to the Google Groups "Materials & Welding" group.To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.For more options, visit https://groups.google.com/groups/opt_out.Dear Exerts,Kindly suggest on following issueWe have a job on which ferrite content test is essential. we are welding with root run by GTAW & sub sequent layer by SMAW. Please confirm whether it is essential to check the ferrite content of the root or final weld.(top of the weld.)Base Material-SA 240 TP 316LFiller Wire/Electrode:- ER-316L & E-316LAlso our requirement is 2FN to 5FN kindly suggest any filler wire/Electrode manufacturer.Regards
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Hareesh K V
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