Brake disk material 1

[raceengineer]

What kind of steel is used for brake disk? I am planning to get them laser cut, out of 9mm steel plates.(Quantity is only 10)

 

[GregLocock]

We use gauge plate, but I don't know what the proper term is. Don't use stainless. Normal brake rotors are grey cast iron, I think, so the basic material properties are pretty hohum. Cheers

Greg Locock

 

[mcguire]

Steel doesn't work as well as graphitic cast iron. It's a issue of thermal conductivity as well as friction properties.

 

[raceengineer]

Thanks, you led my in the right direction. I was actually considering stainless. I found that OEM’s recommend ASTM and ASME specified 80-60-03 Ductile Iron, because of the high-coefficient of friction.

 

[ZoRG]

Old post ... but is there anything new that is better to use? What are discs made of that have a "lifetime warranty"

 

[Tmoose]

These guys suggest "life of the car" rotors are monolithic ceramic material.

http://doc.tms.org/ezMerchant/prodt...OM-0302-32/$FILE/JOM-0302-32F.pdf?OpenElement

These guys offer rotors with a "limited lifetime warranty against warping."

http://www.baer.com/Media/ContentDetails.aspx?ContentID=106

Premium priced "Lifetime" pads are pretty common, but even from big suppliers there may be some FINE print.

http://www.brakewarrantysettlement.com/

 

[Dave K]

I asked on one of the other eng-tips forums, but this seems on topic here too...

What are your thoughts on titamium rotors? (

http://www.zmibrakes.com

)

Link to other thread:

http://www.eng-tips.com/viewthread.cfm?SQID=95224&SPID=108&page=1

-Dave
"Everything should be designed as simple as possible, but not simpler"

 

[ZoRG]

My thoughts are too expensive. I can get a carbon brake setup for close the same as the zmi brakes.

 

[Rob45]

Stainless steel isn't the very best material, perhaps, but it will work quite well when used with the correct friction material - that's what my Suzuki has, and I can attest they work well at 150 MPH+ !

Of course, a bike would have stainless rotors simply for appearance' sake.

My Corvette OTOH has simple carbon steel rotors, which also seem to work quite well but require grinding on a flywheel grinder rather than a brake lathe when turning is required, because of being too hard for the conventional turning tools.