As title. I always thought mild steel was stronger and could handle heat etc etc better without cracking. That right?

So if so, why are all these tubular manifolds made from stainless that always crack, are a bit dodgy to use with ALS, etc etc?

If they can handle the heat better some fairly thick wall mild steel would be idea for manifolds wouldnt it?

2wd Cossie manifold can handle tons of abuse, though it has inconel in it IIRC so its not the best example, granted...