Nodular cast iron+carbon steel with MT

[rele]

Dear Sirs,

I have a requirement for welding cast (nodular cast) with Carbon Steel. The filler material will be SFA– 5.15 E NiFe– Cl.
Anybody see any inconvenince performing MT after welding?
Thanks

 

[denlow60]

Hi Rele

yes it can , PT is also a possibility.

Denlow .

 

[Ripz]

MT would be best suited.

 

[metengr]

You should be using liquid penetrant testing (PT) for the weld and surrounding base material. This is a 99% Ni weld rod.

 

[Ripz]

metengr. You are right. I can't believe i missed that. meh

 

[rele]

thanks to everybody.

The filler material used is Fe 45% Ni 54%

 

[CoryPad]

Magnetic Particle Inspection can be used to find cracks in the base materials and at the interface with the weld, but the weld metal itself will be non-ferromagnetic due to the high nickel content.

 

[metengr]

The wet MT method will not be suitable for the actual interface of the weld because the magnetic particles will align along the weld fusion zone and make for a very difficult interpretation. Use Liquid PT if your interest is for base material surrounding the weld region and the weld metal itself.

 

[CoryPad]

Yes the interpretation can be challenging, but we use the technique successfully, though only for failure analysis rather than accept/reject of production parts.