Heat Bluing

BILL · 03-12-2001, 11:52 PM

How hot and how long does it take to heat blue small parts? Any good rough figures?

Hugh · 03-13-2001, 12:40 AM

Around 550-560 F for 30 minutes

BILL · 03-13-2001, 01:44 AM

Thanks, Hugh!

03-13-2001, 10:16 AM

Bill, The time require to straw or heat blue PO8 small parts will vary widely with the mass (weight) of the part in question, So I check them every 10 minutes and pull out the ones that look done. I normally put them in the oven @450 and they must be VERY CLEAN or the finish will be splotchy.

03-13-2001, 11:44 AM

Good advise! Plus the fact that they will "continue to cook" even after you remove them from the heat. That's to say they will darken a little more as they cool. Takes a little practice to get the color you want, but if it's too dark just buff it off and start again.

03-12-2001, 11:52 PM	#1
BILL User Join Date: Jun 2002 Location: Western Washington Posts: 826 Thanks: 0 Thanked 0 Times in 0 Posts	Heat Bluing How hot and how long does it take to heat blue small parts? Any good rough figures?

03-13-2001, 12:40 AM	#2
Hugh RIP Join Date: Jun 2002 Location: Southeast Texas Swamp Posts: 2,460 Thanks: 2 Thanked 166 Times in 65 Posts	Re: Heat Bluing Around 550-560 F for 30 minutes

03-13-2001, 01:44 AM	#3
BILL User Join Date: Jun 2002 Location: Western Washington Posts: 826 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Heat Bluing Thanks, Hugh!

03-13-2001, 10:16 AM	#4
tom heller Guest Posts: n/a	Re: Heat Bluing Bill, The time require to straw or heat blue PO8 small parts will vary widely with the mass (weight) of the part in question, So I check them every 10 minutes and pull out the ones that look done. I normally put them in the oven @450 and they must be VERY CLEAN or the finish will be splotchy.

03-13-2001, 11:44 AM	#5
BobL Guest Posts: n/a	Re: Heat Bluing Good advise! Plus the fact that they will "continue to cook" even after you remove them from the heat. That's to say they will darken a little more as they cool. Takes a little practice to get the color you want, but if it's too dark just buff it off and start again.