Heat affected bluing

v35

February 14, 2015 13:15

Does anyone know temps above which salt and rust bluing will discolor?

Comments

4 comments

49 harley

February 14, 2015 18:05
IIRC correctly, From PGS days, anything over 315 degrees. Normal was approx. 285, higher for Winnie's with nickel content.
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nononsense

February 15, 2015 05:52
v35,

Are you asking about environmental temps after the product is blued or process temps for accomplishing the blue?

The process temps are as '49 harley' stated.

Best.
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MG1890

February 15, 2015 07:01
The temps are only correct for salt bluing. Rust bluing never exceeds 212F.. Don't know what temp it discolors at.
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MIKE WISKEY

February 15, 2015 07:36
most steel will start to dis-color at about 450 deg. f (blued or not) this is called tempering (temp.) it will start as a light yellow (luger 'straw' colored trigger/springs)and progress to brown to light blue (think colt springs) and finaly dark blue.
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