When do brakes glow?

[djones]

We went for a drive last night and after some heavy (but not extreme) braking got the disk temperature up to 375 deg C.

I was just wondering how far this is off glowing?

At a guess I would say during the actual brake application, not 20 seconds later while we parked up they must have been over 500 deg c???

[Scotracer]

Glowing depends on the material.

Glow is caused by the changing of radiative heat from infrared into the visible spectrum and is caused by increase in temperature. I can't find the relevant graph to show you and that's all I can remember. I'm an awesome engineer

[Jersey Tom]

775C or so for steel is when it starts to glow.

[djones]

775 - ah, Can't see us getting near that then.

[Shrek]

775C or so for steel is when it starts to glow.

I thought 900F for Steel rotors

[Jersey Tom]

Nah brah. To get steel cherry red or so, you gotta get it toasty. 1400F or so.

For it to really be glowing a nice bright orange or yellow you're talkin 1600F.

That's so you can actually see it glowing worth a damn.

[Belatti]

Glow?

[youtube]http://www.youtube.com/watch?v=XxLhSArA ... re=related[/youtube]

[Belatti]

I wonder what did the laser temp gauge was reading...

[youtube]http://www.youtube.com/watch?v=_2u7udw1 ... re=related[/youtube]

[ISLAMATRON]

Glow?

[youtube]http://www.youtube.com/watch?v=XxLhSArA ... re=related[/youtube]

I cant believe people are stupid enuff to do things like this and the person filming has to have several extra doses of stupid.