As per my past experience on Al welding i am sharing a few points with you..
1)Please weld with ER4043(has 577 degrees celcius solidus) which will provide you with more ductility.Generally a dissimilar filler wire having a lower melting temp. and similar or lower strength than base metal is used.
2)Weld in a dust free environment. This will give you a good UT / RT quality weld. For UT ensure that calibration block is similar to base material.
Hydrogen can be introduced into weld from the residual hydrocarbons or hydrated oxides on surface of base metal or filler wire or gas. During solidification hydrogen precipitates out of the solidifying molten Al and gets entrapped in solid weld metal as porosity.Hence store the filler wire in a dry environment.
After welding every run, slight hammering with a flat rounded wooden hammer tends to close porosities (this is a practical solution !!!)
3)For bend test, the guided bend wrap around jig shown in ASME Sec IX QW466.3 will give better resuls with slow bending.
4)Also as the base metal has %elongation less than 20%,as per ASME SecIX QW466.1,the former diameter will be 32 7/8t and not 80mm which you are using.
Regards
Prem Nautiyal
(B.Tech,AMIE,DBM,LMIIW,IWE,CSWIP3.1)
Mumbai, cell:9820313278
On Wed, 03 Feb 2010 16:46:02 +0530 wrote
>
thanks Pradip,
>
>
as per the standard the Aluminum is not preheated and the maximum interpass temperature is 120 degree C.
>
>
but do I need to preheat it before welding as the weather is +5 degree C maximum here.
>
>
best regards and many thanks
>
Elshan.
>
>
From: pgoswami@quickclic.net
>To: materials-welding@googlegroups.com
>Subject: [MW:4195] Welding of Aluminum plate grade 6082 T]
>Date: Tue, 2 Feb 2010 19:25:19 -0500
>
>
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Hello Elshan ,
You may try the following:--
Ø Change the filler wire to 4043 ,as the filler contains slightly more Silicon, it would help in the weld puddle, with good fluidity and wetting.
Ø Use the correct mandrel diameter for bending Aluminum, check with ASME Sec-IX-, QW-466.1 for the correct mandrel diameters. As this alloy (6082-T-651) is aged after solution treatment , ductility is generally at the lower end(poor).
Ø If you can get alloys with lower iron content ( Fe typically 0.5 max) it would help. Iron generally reduces ductility, through formation of second phase ,such as intermetallic phases (see the attached document FYI)
I hope the solutions mentioned above would help you. Feel free to share your further experiences on this issue .
Thanks
Pradip Goswami,P.Eng
Senior Engineer/Specialist(Welding-Metallurgy)
Engineering & Training Services Division
ONTARIO POWER GENERATION Inc.
PO Box-2000, RR-55(South)
Nanticoke, Ontario,N0A1L0
Tel:-(519) 587-2201, Ext 3107--in Nanticoke
(416) 231-4111, Ext 5925--in Kipling,Toronto
Fax:(519) 587-6814
Email-pradip.goswami@opg.com.
-----Original Message-----
>From: pgoswami@quickclic.net [mailto:pgoswami@quickclic.net]
>Sent: Tuesday, February 02, 2010 10:49 AM
>To: GOSWAMI Pradip -THERMAL
>Subject: [Fwd: [MW:4186] Welding of Aluminum plate grade 6082 T]
---------------------------- Original Message ----------------------------
Subject: [MW:4186] Welding of Aluminum plate grade 6082 T
From: "Elshan Feyzullayev"
Date: Tue, February 2, 2010 6:55 am
To: materials-welding@googlegroups.com
--------------------------------------------------------------------------
Dear friends,
I need to run the new WPS in Aluminium steel plate using the attached grade of Aluminum plate.
How many times I have tried but I can not get the acceptable results from bend test.
It is broken after slight bending.
Can you help me please how to weld it to get the acceptable results from bending?
The wire I am using is ER5356 which is recommended for this type of AL.
Best regards,
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PREM S NAUTIYAL
CELL : 9820313278
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