Mr. Vijay
As pointed out by you, a 6, throat can be welded using single pass technique.
The leg length will work out to be 8.50 mm or 9.00 mm . You easily get it using
following parameters.
Have carried out hundreds of joints in 2F position.It can be achieved with few
trails at your end and without any undercuts.
You can also succeed with
- Welding process :- GMAW.
- Filler Wire :- ER 70 S6 (1.2 mm dia)
- Shielding gas :- 80 % Argon + 20 % CO2
- Wire feed 10.30 m/min. on Lincoln or 9.90 m/min on Miller or it may vary depending up on machine and its condition.
- Current : 280 - 290 Amps
- Voltage : 28.5 to 29.
- Travel speed : 270 - 300 mm/min
- Position 2F
If you need any further info. pl. let us know.
Sridhar.
sridhar305@yahoo.com
From: Kannayeram Gnanapandithan <kgpandithan@gmail.com>
To: materials-welding <materials-welding@googlegroups.com>
Sent: Friday, 20 January 2017 7:53 PM
Subject: Re: [MW:25956] Fillet size a6 with single layer (GMAW welding process)
Use 1.6mm, amp around 355
On 16-Jan-2017 10:12 am, "Vijay Katkar" <katkar.vijay22@gmail.com> wrote:
--Dear Experts,Our customer is forcing us to do multilayer welding for 6mm throat size, which is increasing our welding time because most of welding is in a6 size.I have tried so many test coupon to prove that a6 can be done by single layer but I am not succeed in all test.Customer requirement is root penetration at least 0.3 mm. But I am not able to achieve it. refer following parameters which I have used.
- Welding process :- GMAW
- Filler Wire :- ER 70 S6 (1.2 mm dia)
- Shielding gas :- 80 % Argon + 20 % Co2
- Current :- 245-255 Amp
- Voltage :- 26.5 to 27.5
- Travel speed :- 220 - 240 mm/min
Please advise any modification is required in the parameters.Should I change Shielding gas composition?Waiting for your valuable reply?Thank youVijay Katkar
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