flywheel cracks?

I cleaned up and sandblasted the flywheel tonight and was going to put on a new ring gear. After getting it cleaned up I noticed all these little stress cracks in it. Some might come out but I don’t think they can all be removed by resurfacing. Does this mean I’m now looking for a new flywheel too? What caused these? Excess heat from slippage?
Opinions appreciated!
Tim

Thanks guys! This is good news; I didn’t really want to have to look for a new one. I'll have well over a grand in the engine before I’m done now! I guess I forgot to mention it’s off my H. I’m still waiting to get the crank & head back from the machine shop. Supposedly gonna be done this week so when I pick those up Ill drop off the flywheel. I need to update my web page with what little progress I’ve made lately. Mostly just cleaning, sandblasting and priming lots of parts. Anything that will fit into the cabinet. The bigger parts have to wait for warmer weather so I can sandblast outside. I do have the block done so can begin assembly of the engine as soon as I get the parts back from the machine shop.
Tim

• Farmall H Project

Grind 'er down.

Almost all used flywheels look like that when ya pull 'em down. Stress cracks are caused by heat/pressure.

Allan