welding 304l to cast iron

By setzep Date 02-28-2004 15:30

What I want to do is weld a section of 1.25 sch 10 304l pipe to a cast iron turbine housing from a turbocharger. Is it possible to weld these two materials together using a TIG or a MIG welder? Also if it can be done what precautions need to be taken and what filler rod or wire needs to be used?

Thanks for your time
-Cam

By Bill A

Date 03-01-2004 20:09

there are some nickel alloy filler metals that will do the job. I suggest looking at http://www.specialmetalswelding.com/publica/joining.pdf for general guidance and http://www.specialmetalswelding.com/products/mig/mig.htm for specifics of some of the weld metals. I know joining stainless to steel is common using Inco 82, but I'm not sure if a buffer layer of something else (like Ni-Rod 44) is advisable on the surface of the cast iron before joining the stainless to it. It may be sufficient to overlay the surface of the cast iron with the Inco 82 nickel alloy filler metal then weld the stainless to the nickel weld metal deposit. Typical practice for cast iron welding includes high preheat of the cast iron and slow cooling.

By R-win

Date 05-27-2004 23:03

cast iron can be lamelair or globlar. Globular cast iron can have some shrinking stresses. Best way is to buffer with special pure Nickel electrodes (UTP 8) and hammering on the hot bead to prevent high stress.
Also with pure nickel or nickel-iron (UTP 86FN) to make the joint between buttering and pipe.

By brande

Date 05-29-2004 05:16

I'd choose aluminum bronze A2 (Ampco 10)

Good Luck
brande