UnderCut

azar · **Joined:** Sat Sep 05, 2009 11:07 am **Posts:** 34

What is the acceptable limit for undercut. Is there any ? Also the undercut is a repair or a defect that can be accepted.

leem817 · **Posted:** Tue Mar 02, 2010 9:19 pm

What is the acceptable limit for undercut. Is there any ? Also the undercut is a repair or a defect that can be accepted.

azar,

Read UW-35(b)(1) and (2) for the tolerances.

leem

Ballbearing · **Posted:** Wed Mar 03, 2010 8:02 am

Azar,
What code are you fabricating to ?
Different codes have different acceptance criterias.
Regards,
BB

azar · **Joined:** Sat Sep 05, 2009 11:07 am **Posts:** 34

We are fabricating as per AWS D1.1

dukenukemQA · **Joined:** Fri Sep 16, 2011 2:43 am **Posts:** 4

Undercutting acceptance is clearly identified in AWS D1.1. I do not have a code copy infront of me but from memory I believe it is 1/16" in the direction of stress and .10" cutting across the direction of stress. The limits are lower on thinner steels but 1/16" covers 3/8" or so and up. I have not worked to AWS codes in a long time but I know undercut is listed in there.

sooeey2u · **Posted:** Sat Sep 17, 2011 3:54 pm

AWS D.1. Table 6
For statically loaded nontubular structures, for material less than 1 in., undercut shall not exceed 1/32 in., except that a maximum 1/16 in. is permitted for an accumulated length of 2 in. in any 12 in.. For material equal to or greater than I in. thick, undercut shall not exceed 1/16 in. for any length of weld.

For cyclically loaded nontubular connections and tubular connections (all loads), undercut is not acceptable.

QCRobert

azar · **Joined:** Sat Sep 05, 2009 11:07 am **Posts:** 34

Dear all

Thanks for your help

Regards
Azar

UnderCut

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