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Re: [MW:30063] Aluminium welding failure from parent metal

By Materials & Welding
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
                        
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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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