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Home > Forums > Materials Engineers > Materials > Metal and Metallurgy engineering Forum

G3000 Gray Iron - School me on itHelpful Member!(2) 

thread330-244182
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toastedhead (Mechanical)
1 May 09 12:25
We're going to manufacture some brake rotors here for the owners personal race car. Ive determined we're going to use G3000 cast grey iron per the SAE standard for the alloy. I have some questions regarding stress relieving.

From what I understand - you stress relieve the iron prior to machining correct?

Any other processes I should do to brake rotors?

What about cryogen? Ive heard its great and Ive heard it doesnt make a pinch of crap difference.

thanks for your help
Helpful Member!  arunmrao (Materials)
1 May 09 13:19
  
"Introduction to Gray Cast Iron Brake Rotor Metallurgy"
http://www.sae.org/events/bce/tutorial-ihm.pdf

I have not failed. I've just found 10,000 ways that won't work." — Thomas Edison
_____________________________________
 
Helpful Member!  swall (Materials)
1 May 09 15:29
At the risk of starting another cryo war--don't bother with cryogenic treatment on the rotors you will be making.
toastedhead (Mechanical)
1 May 09 15:38
I appreciate the response - but I already had that.
toastedhead (Mechanical)
1 May 09 15:42
Swall - thanks for the input but I need something more than just "dont bother with it". Got some experience or justification?
swall (Materials)
2 May 09 19:17
OEM rotors are not cryo treated. Rotors from Autozone, NAPA and other aftermarket OEM type rotors are not cryo treated. If you are making a specialty product, you could consider the profit enhancing opportunities of cryo treatment.
arunmrao (Materials)
3 May 09 10:34
Brake rotors cryogenically treated
thread330-145775: Brake rotors cryogenically treated

This thread had discussed the merits and demerits of cryo treating brake rotors.  

I have not failed. I've just found 10,000 ways that won't work." — Thomas Edison
_____________________________________
 
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