Re: [BULK]Re: [MW:30068] Aluminium welding failure from parent metal

Thank you all experts for you valuable feedback.

On Tue, 17 Sep 2019, 08:48 Lu, Feng <luf@zachrygroup.com wrote:

I agree with Ramin's comment below.  Also from the attached test results you provided, the failure is in base metal. 

 

I suggest you to do a tensile test just with the base metal.  If the base metal comes lower in strength, it is not going to get improved by welding.

 

 

Feng Lu, Ph.D., NDE Level III Metallurgy and Welding Engineer

Zachry Industrial, Inc. 3600 West Sam Houston Pkwy South Suite 200 Houston, TX 77042 luf@zachrygroup.com Office: 713.979.2648 Cell: 512 797 5777 www.ZachryGroup.com

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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ramin Kondori
Sent: Sunday, September 15, 2019 8:27 PM
To: materials-welding@googlegroups.com
Subject: [BULK]Re: [MW:30063] Aluminium welding failure from parent metal

 

Normally, the specifications specify lower tensile strength levels for weld qualification test for these Aluminum grades (comparing to the original tensile strength of the parent metal); it is due to the softening effect of welding on Aluminum. 5754 plates are Al-Mg3 grades with subsequent work hardening and some tempering (quarter hard) and their welds (or HAZ) is weaker than the unaffected plate; it is normal. 

 

Having said that, I believe that with these results, you might be in the acceptable range. I recommend you to check your specification and confirm this point before proceeding. 

 

Ramin  Kondori

Sr. QA/QC & Welding Engineer

-----------------------------------------------------------

PG-Dip. in Welding Engineering (IWE  AT  0070)

BSc. in Civil Engineering (IUT)

BGAS Painting Inspector

ASNT Level I&II

                        

 

 

On Sun, Sep 15, 2019 at 5:31 PM <kadirgodil@gmail.com> wrote:

Dear experts,
EN AW 5754 H22 welded with ER5356, RT clear but gets failed in tensile.
What can be the reason please guide..
The artilce wleded is a 3 mm thick plate to plate butt joint.
Required YS 0.2 - 130 MPa
I am getting only 103 and 99 MPa.

Required UTS - 220-270 MPa
I am getting - 213 & 205 Mpa

Regards
Kadir godil

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