Monel - type 304 SS dissimilar welding

[Soldador]

I need to have any idea of the welding parameters to weld a 304L plate using monel filler 60 (or 67).Or any parameter that you have used with similar materials. The welding proccess is GTAW.

thanks

 

[CadAndy]

What are you welding plate, tube, bar.
What size are you using.

Argon doesn't get as hot as Helium. So
your amps will be set lower. If you do
a purge 2 to 3 seconds before and about
5 seconds after.

The thickness of the two materials will
also tell you your tungsten rod size and
size of filler metal to use.

Ex. 0.25" material you can use a rod size
of approximately 0.13"

0.06" material you would use a 0.03"
rod size

hope that helps

 

[Soldador]

The particular case is the following:
Groove weld plate horizontal (1G AWS), thickness 1/4 in., GTAW 100%Argon.

 

[chiph]

excuse me for asking but, why monel filler for type 304?

 

[Soldador]

the reason is because we are looking for a welding procedure with free Cr+6 fume emision. We think if we control de dilution during the welding, then we can reduce the Cr+6 emision produced by type 304 SS, which affects the healt.

 

[chiph]

pulsed inverter will lower the fumes considerably also.