Need help with cracked turbo manifold

Rusty

See if a magnet will stick to the manifold. If it doesn't stick. It could be a 300 series of stainless steel. If it sticks. It could be cast iron, cast steel, or a 400 series of stainless steel. 300 series of stainless steel doesn't rust. 400 series of stainless steel will.

They have been weld repairing exhaust manifolds for decades. It all depends on the skill and knowledge of the guy doing it. I've done a lot of cast iron welding when I for for Elliott TubroMachinery. Some of it, we had to pre-heat to 1,200F before we could weld on it. It was glowing red.

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