G3000 Gray Iron - School me on it
2

Question

G3000 Gray Iron - School me on it

toastedhead (Mechanical)

(OP)

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

arunmrao (Materials) · Answer 1 · 2009-05-01 13:19:24

"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
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swall (Materials) · Answer 2 · 2009-05-01 15:29:05

At the risk of starting another cryo war--don't bother with cryogenic treatment on the rotors you will be making.

toastedhead (Mechanical) · Answer 3 · 2009-05-01 15:38:06

I appreciate the response - but I already had that.

toastedhead (Mechanical) · Answer 4 · 2009-05-01 15:42:31

Swall - thanks for the input but I need something more than just "dont bother with it". Got some experience or justification?

swall (Materials) · Answer 5 · 2009-05-02 19:17:06

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) · Answer 6 · 2009-05-03 10:34:05

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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G3000 Gray Iron - School me on it
2