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 you
Vijay Katkar
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
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