filler metal to weld astm a743 ca15(a296 ca15)

grouchley;
If this is for structural repairs to a cast 410 stainless steel valve ball, I would recommend a 410 stainless steel filler metal, SFA 5.4 using the SMAW process.

The preheat requirement would be 450 deg F minimum. Post weld heat treatment (PWHT) would be in the range of 1200 deg F to 1400 deg F (depending on the final strength level required) for time based on the thickness of weld deposited. The cast 410 stainless is readily weldable with preheat and PWHT maintenance and would not require welding in stages.

As a minimum, I would recommend nondestructive testing (NDT) in the form of wet fluorescent MT or Liquid Penetrant testing (PT) be performed after all welding is completed.

I presume you are welding the ball and not the body or tail piece(end piece).

Is this repair as a result of wear?

OR is it a fresh casting and you are attempting to salvage by weld repair. If it is the second option,I would recommend you to reject this piece and cast a new one defect free.

If it is a used ball valve how much has the wall thickness of the ball reduced? Will you be able to machine the ball and ensure perfect seating? I hope you have consdered these issue before undertaking the task of salvaging.

As suggested by metengr,410 filler material can be used. Please keep observing for any weld cracks.

Let us know the result after you have completed the job.

I have not failed. I've just found 10,000 ways that won't work." — Thomas Edison
_____________________________________

thanks for your information.
The ball valve passes slurry
and from not being closed properly has some edge damage
The reason for repair is price and availability here in south America.

Can you consider hard facing the ball casting at the edges. This can improve the wear life.

Also it should not be difficult sourcing a new ball valve in the current economic scenario. you only need to contact your valve manufacturer.

I have not failed. I've just found 10,000 ways that won't work." — Thomas Edison
_____________________________________