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Heat Treating and Metallurgy Discussion of heat treatment and metallurgy in knife making.

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  #1  
Old 06-16-2012, 07:45 PM
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Eli Jensen Eli Jensen is offline
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Temperature color

Question, do all metals glow the same brightness at the same temperature? Example, is brass the same bright red at 1500F as steel?
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Old 06-17-2012, 12:52 AM
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Try not to think about it as item X color temp but more what color temp is is nothing more than wavelengths of light and how the human eye perceives that.



Copper melts around orangish - yellowish


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Old 06-22-2012, 06:27 PM
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Some never change color. My guess would that different metals would have different colors when at the same heat. Stick a piece of brass and a piece of steel in the ht oven and see what happens. I know brass glows nice.
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Old 10-24-2013, 09:25 PM
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Thanks for the chart
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Old 10-25-2013, 06:49 AM
WBE WBE is offline
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Quote:
Originally Posted by Eli Jensen View Post
Question, do all metals glow the same brightness at the same temperature? Example, is brass the same bright red at 1500F as steel?
I read somewhere that they do, but you would need to research that to really be sure.
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Old 12-17-2013, 05:35 AM
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Very easy test to conduct. Just make sure you reduce your variables to the steel types. Ie- same finish, same geometry, same spot in your heatsource, etc.


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Old 12-22-2013, 11:17 AM
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It's not exact as it depends on alloy, surface condition [finish, oil etc] . You can get temperature crayons especially helpful when you're learning.
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Old 12-31-2013, 05:08 PM
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Quote:
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I read somewhere that they do, but you would need to research that to really be sure.
But some metals don't even change color before they melt.


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Old 01-01-2014, 05:25 AM
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Quote:
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But some metals don't even change color before they melt.
True, but said metals do not get the opportunity to change colors because they vaporize before reaching a particular temperature color level. Lead would be an example.
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Old 01-02-2014, 12:57 PM
metal99 metal99 is offline
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True true. You got me lol.


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Old 01-03-2014, 04:56 AM
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Try welding aluminum.


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Old 01-07-2014, 08:05 PM
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Try welding aluminum.
I've welded aluminum both with a mig and (believe it or not) just for fun at school we welded some with the oxy/acet torch. Now that is hard! lol.

The hardest thing I have done with aluminum is heat shrinking damaged body panels.


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Old 01-08-2014, 05:52 AM
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Yeah, there's definitely a learning curve with Al. Wouldn't want to try it with a o/a torch, tough enough with a mig. Thing is, there is no color change before a hole appears, nothing like steel.
(Just for those that don't know.)


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