# Why are the colors of metal different than the blackbody spectrum?

The blackbody color spectrum up to about 11,000 degrees Farenheit looks like this:

However, when iron or steel is heated it produces light in the following colors:

So it starts to luminesce at about 1000F and gets white hot at 2500F, not 11,000F. Another difference is that before it reaches white hot, it turns yellow (the image showing green is offcolor, it is actually yellow). However, the blackbody color is more like orange, not yellow.

So, I guess iron cannot be considered a "blackbody", but what is the reason for the difference?

• Can you include a link to your source for these images? – rob Aug 31 '17 at 18:13
• Do you know what a blackbody is? Do you have a reason to expect metals to fulfill the definition of a blackbody? – DanielSank Aug 31 '17 at 18:21
• You should make the two plots have the matching x-axes and color scales to pose a meaningful question. Right now it is not possible to quantitatively answer your question I'd say. – KF Gauss Aug 31 '17 at 18:49