D1.2 root and face bend cupons

Date 11-17-2010 09:49

The notes on figure 12.3 - note 1. Weld reinforcement and backing strip or backing ring, if any, shall be removed flush with sufrace of the specimen.
How do you get it flush? Unlike the steel sample that I've worked with, I can't seem to get these alumimum cupons flush without reduceing material thickness.
How flush is flush? With D1.1 code fig. 4.12 referes me to 5.24.3 for the flush tolerances, in D1.2 I do not find this tolerance.
With our WPS qualification plate we sent the test plates to lab for x-ray and bends. We would like to do in-house welder cert testing to this procedure in-house with bend testing, but we seem unable to get samples "flush" without reduceing material thickness. Additionally I see humps and transition line at edges of the weld and am concerned that these will be stress risers. Am I being to picky? Opinions please.

Attachment: alusample2.jpg (6k)

Attachment: alusample1.jpg (6k)

By 803056

Date 11-17-2010 21:18

It appears you are using a shear to cut the coupon. The shearing operation work hardens the aluminum so that it takes more effort to gring the ends of the weld than the center of the weld. Likewise the weld is harder than the HAZ, so the HAZ is removed more easily than the weld.

It also look like you are using a "soft" disk rather than a hard rigid disk. Switch to a rigid disk and saw cut the bend straps and much of the diffculty you are experiencing should go away.

Flush is even with the adjacent base metal. A slight amount of reinforcement isn't going to hurt.

Best regards - Al

By bozaktwo1 (***)

Date 11-18-2010 17:40

I put mine in a mill and let the machinist take care of that. :) Otherwise, what Al said.

By Mwccwi

Date 11-19-2010 10:52

Thanks for the responses, i was kind of thinking along the same train of thought.

By eekpod

Date 11-19-2010 14:32

OMG you guys are slipping...tsk tsk..

He said D1.1 and an aluminum test coupon...wrong code for the material.
I would have expected you to catch on :)
For aluminum its D1.2 and the raduis is different than D1.1
(unless it was a typo and he meant D1.2 but types D1.1

By d_paul71 (**)

Date 11-19-2010 14:50

LOL Nice job eek..... :)

By jwright650 (*****)

Date 11-19-2010 15:06

Uh..Chris,
He has D1.2 in the title of the thread, and only mentions an example of D1.1 (a flush tolerance)...

"With D1.1 code fig. 4.12 referes me to 5.24.3 for the flush tolerances, in D1.2 I do not find this tolerance."-quote

I think he is asking for the same type of reference of how flush a sample can be in D1.2, that he's found for samples in D1.1.

By eekpod

Date 11-19-2010 20:04

aw shucks :)

By Mwccwi

Date 11-22-2010 09:43

Thank you, I appreciate the support, jwright650 is correct in how I was asking for help with the aluminum cupons.

By Milton Gravitt (***)

Date 11-22-2010 15:45

Where is the notes on figure 12.3 - note 1. because I can't find this in D1.1 2004 or D1.2 2003.or maybe I'm over looking it.

M.g

By Mwccwi

Date 11-23-2010 13:01

"With D1.1 code fig. 4.12 referes me to 5.24.3 for the flush tolerances, in D1.2 I do not find this tolerance."-
I'm using 2010.
I went back to 1998 D1.1 and it is note 3 under fig.4.12

By Milton Gravitt (***)

Date 11-23-2010 14:51

Mwccwi, I don't know where this will be any good to you but I hope it will I'm using AWS D1.2 2003 on page 183 C4.19 Weld Profiles
it will carry you to other places in the code .

M.G.

By Mwccwi

Date 11-23-2010 17:17

Thanks, I'm using D1.2:2008. no comentary c4.19. I don't have the '03 edition
and the 4.19.2 is for groove welds profiles as welded nothing about flush tolerances.