Cast iron and heat 4

[dicer]

At what temperature will cast iron distort?

 

[MintJulep]

All of them.[tt][/tt]

 

[patprimmer]

How long is a piece of string.

Regards
Pat
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[micalbrch]

700 °C

 

[dicer]

How detrimental is 700 deg F to grey cast iron, will it stress relieve enough to need remachining? I know remachining is needed if its into the 1400 deg F range. Sorry I ran out of time and just couldn't finish the first post.

 

[patprimmer]

It will only stress relieve at any temperature if it has frozen in stress to be relieved.

Regards
Pat
See FAQ731-376 for tips on use of eng-tips by professional engineers &

http://eng-tips.com/market.cfm

for site rules

 

[MintJulep]

What grade of cast iron?

What is the starting state of the piece? As-cast, machined, already tempered or annealed?

Heated how?

Cooled how and for how long?

The possibility for distortion is largely dependent on geometry.

 

[dicer]

Just typical engine blocks heads etc.