Tig welding a tractor part?

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John Hasler
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Re: Tig welding a tractor part?

Post by John Hasler » Tue May 19, 2020 8:02 am

liveaboard wrote:
Tue May 19, 2020 2:00 am
I also think it must be iron; steel would have bent instead of breaking.
It's clearly a steering part, the original break could have been the result of an accident.
Cast iron seems a poor choice of material for a part like that but you have to work with what you have.
Good point. Cast steel will break, but not usually that neatly. We are seeing a failed weld, not the original break, though.

Would be nice to find out what the material really is.

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liveaboard
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Re: Tig welding a tractor part?

Post by liveaboard » Tue May 19, 2020 12:42 pm

The original break is there right under the weld. something broke it like glass [or like cast iron] at an unknown earlier date.

I would grind, then weld with stick from the inside, then grind and weld on the outside, then stress relieve it in an oven.

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warmstrong1955
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Re: Tig welding a tractor part?

Post by warmstrong1955 » Tue May 19, 2020 12:47 pm

Cast steel will break like that too.
I've found front end & suspension parts to me all over the map. Some are cast iron, others are cast steel, as well as forged, most notably Pitman arms.

A quick zap on the grinder will determine if it's cast iron or steel.
Today's solutions are tomorrow's problems.

johnfreese
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Re: Tig welding a tractor part?

Post by johnfreese » Tue May 19, 2020 5:37 pm

The appearance of the fracture surface in cast iron is unique. Broken cast iron pieces fit together without gaps.

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