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Posted: 4/23/2017 2:33:38 PM EDT
Yeah I did it
 Tested out my new HF tumbler, and SS media, and ran some 9mm cases, and some 6.5 swede brass I had laying around that needed cleaned. Anyways, I removed them from the drums, rinsed, shook water off, and put them on a small pan and put them in my little toaster oven, which I thought I had set to 150, but it was on 250 brass was in there about a hour and a half or so, and now my brass has a rainbow pink color too it.
I didn't fuck my brass up did I? I hope? |
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Posted: 4/23/2017 2:39:10 PM EDT
[#1]
My kneejerk is that at worst, you full-length annealed them.
I reserve the right to be wrong though, and will treat this reply as an OST & wait for a metallurgist to reply. |
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Posted: 4/23/2017 2:42:39 PM EDT
[#2]
Well, I also got to reading pink brass may be too much acid in my mixing slurry. I did use a squirt of dawn, and around a teaspoon of the brass shine that was provided with my SS media from Guntap. I did not have any lemi-shine to try...
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Posted: 4/23/2017 2:43:55 PM EDT
[#3]
No issue, they won't anneal at 250. ETA: not a metallurgy expert just using logic.
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Posted: 4/23/2017 2:45:35 PM EDT
[#4]
Think it takes a lot higher temp to anneal even if left in for an hour. Need a metallurgist to be sure...
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Posted: 4/23/2017 3:10:30 PM EDT
[#5]
I didnt think 250 would anneal it. The color is kinda uneven, and looks like surface color. Im gonna lean on that brass shine crap i used. Will use lemi shine from now on and see.
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Posted: 4/23/2017 3:47:58 PM EDT
[#6]
JNK556
The red or pink color that you saw is the zinc being leached out of the brass. What you caused is dezincification and it ruins the brass and the brass should be scrapped. 250 degrees shouldn't have annealed the entire case but to be sure, load only a few and try them out. If none of them split or blow the primers out, you should be good to go. |
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Posted: 4/23/2017 6:58:43 PM EDT
[#7]
I dry my brass at 230 degrees, never turns pink. When you anneal brass you heat the end until it slightly dis colors.
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Posted: 4/23/2017 7:23:01 PM EDT
[#8]
The color is from whatever you used wet tumbling. It has nothing to do with being 250 degrees.
Unless you went way out of bounds with your cleaning solution I doubt that the brass has been adversely affected. Motor |
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Posted: 4/23/2017 10:15:57 PM EDT
[#9]
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Posted: 4/23/2017 10:48:18 PM EDT
[#10]
Quote HistoryQuoted:
It's my understanding that brass won't anneal until it reaches 400 degrees. I let my wet tumbled cases dry overnight. If you don't have enough brass to do this, they make a dehydrator they call a brass dryer. Dries cases in about an hour. http://i250.photobucket.com/albums/gg272/dryflash3/Wet%20Tumbling/P8200386.jpg I never use mine anymore. |
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Posted: 4/23/2017 11:03:08 PM EDT
[#11]
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Posted: 4/23/2017 11:24:43 PM EDT
[#12]
That particular brass dryer was known at one time as the Ronco Food Dehydrator. It was sold in a smoke gray color. Everybody in my family had one.
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Posted: 4/23/2017 11:32:05 PM EDT
[#13]
I did the same to about 80 pieces of 6.5 creedmore.
Set the oven at 325 and forgot about it, baked about 30min. usually I dry them in the dryer on the shoe rack. But wife was doing laundry and I was in a hurry. Nervous to load them now. |
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Posted: 4/23/2017 11:45:16 PM EDT
[#14]
You might try squeezing a neck with a pair of pliers.
And then anneal a case cherry red and see the difference of dead soft over done . |
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Posted: 4/24/2017 12:04:14 AM EDT
[#15]
250 won't hurt the metallurgy. As mentioned, the rainbow pink is from the cleaning chemistry (probably a bit high on the lemi-shine) but could also be from not getting them rinsed completely.
Drying at 150 F really isn't doing much other than speeding basic evaporation. Remember that water boils at 212F, so to really get it all out in a decent amount of time you need to be over 212F. |
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Posted: 4/24/2017 12:11:37 AM EDT
[#16]
You should never use a toaster oven to dry your brass. The same goes for the broiler in your oven.
Toaster ovens use direct radiant heating. They probably have a sensor that reads the air temperature but metal items in direct view of the heater elements may run at a substantially different (higher) temperature than the air. Shiny metals, like clean cases, are particularly susceptible to this large temperature gradient. An oven in bake mode has a baffle between the heater elements and you almost certainly have a cookie tray acting as a baffle, too. These baffles preclude the strong radiant flux coming off the burner in an oven. |
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Posted: 4/24/2017 12:18:06 AM EDT
[#17]
The harbor freight brass dehydrators work great. I use mine with the same timer I use on my tumbler https://www.amazon.com/dp/B001DD7YSE?tag=vglnk-c102-20
I usually set to 2 hours, but its probably mostly dry in one. |
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Posted: 4/24/2017 1:40:10 AM EDT
[#18]
I do the "Big Lebowski" with an old bath towel, then on to an old aluminum cookie sheet that is on garage duty now. I heat the oven up to 200* set on convection, pop the brass in and set the timer for 30 minutes. By the time the oven cools to touch, brass is perfectly dry and spot free.
Just make sure to remove from oven before your Wife preheats the oven to 425* to make dinner. 
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Posted: 4/24/2017 9:23:50 AM EDT
[#19]
I also doubt you did any damage to the brass. Like others said, it needs to get to at least 400* to start annealing.
The ''magic number'' of the amount of Lemi-shine to use is one 45ACP case per gallon of water. Plus or minus a little is fine but a whole teaspoon was way too much, that's what causes the pinkish color. Dump your brass in a towel and hold the ends then roll the brass from end to end by tilting one end up and the other down a few times. Then rub the towel around on top of the brass to get all the water off the outside. That will stop the water spots. |
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Posted: 4/24/2017 12:37:22 PM EDT
[#20]
I use the 1.3cc Lee powder scoop plumb full in each drum.
I have read nothing happens to the brass until about 500° no matter the exposure time. |
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Posted: 4/24/2017 1:42:56 PM EDT
[#21]
From that phase diagram it appears somewhere near 250c (482f) is where brass enters the "stress relieving zone". Not my diagram but since everything posted on internet is true, it must be gtg. 
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Posted: 4/24/2017 2:04:31 PM EDT
[#22]
I retumbled the cases with just dawn water and ss media for another hour rinsed well, and dried on 200 for a hour all is well now.
Guess it was too much of that shine stuff. |
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Posted: 4/24/2017 3:40:55 PM EDT
[#23]
I spread out a big towel on the picnic table and dump the wet cases on the towel. I roll the cases around by hand and dry the outside. On a really sunny day they are completely dry in 15 minutes. Arizona sun.
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Posted: 4/24/2017 4:44:59 PM EDT
[#24]
Quote HistoryQuoted:
I spread out a big towel on the picnic table and dump the wet cases on the towel. I roll the cases around by hand and dry the outside. On a really sunny day they are completely dry in 15 minutes. Arizona sun.
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Posted: 4/25/2017 12:33:35 AM EDT
[#25]
Quote HistoryQuoted:
I retumbled the cases with just dawn water and ss media for another hour rinsed well, and dried on 200 for a hour all is well now. Guess it was too much of that shine stuff. When I first started out wet tumbling I r ad the harder your water, the more lemishine you need. Being on a well in the Rocky Mountains I assumed more would be better, boy was I wrong. I have settled on a health squirt of dawn and a very light sprinkle of lemishine and am happy with the results |
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Posted: 4/25/2017 2:40:00 PM EDT
[#26]
Quote HistoryQuoted:
https://www.copper.org/publications/newsletters/innovations/2000/01/images/phase_diagram.jpg From that phase diagram it appears somewhere near 250c (482f) is where brass enters the "stress relieving zone". Not my diagram but since everything posted on internet is true, it must be gtg. That chart does not show lower zinc completely. |
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Posted: 4/28/2017 10:25:37 PM EDT
[#27]
I do essentially what dryflash3 does; I dump the brass on a towel and get most of the surface dampness off that way, then it goes in my Harbor Freight dehydrator for 30 minutes or so - longer for a really full load. It comes out dry, shiny and clean. Let it sit first, because it'll be hot!
In doing annealing, some sources advise using Tempilaq temperature indicating liquid at both the mouth and head of the case. You use 750 Tempilaq on the mouth and 450 on the head. If the 450 melts, you have softened the head. So I don't think 250ºF in the oven has hurt your brass. I used to put mine on a cookie sheet and dry it at 200ºF for 20 minutes. The dehydrator is much more convenient and doesn't heat the kitchen up the way the oven does. Oh, and it was MY cookie sheet, only used for loading stuff, never cookies.
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Posted: 5/6/2017 8:56:08 PM EDT
[#28]
Now I think this would be an example of overheating. Got called to work a couple of days ago while I was tumbling about 150 RP 223 cases. Instead of leaving them outside in the sun while I was gone I put them in the oven at 220 for 20 minutes.
As I was walking out the door there were 3 minutes on the timer so I turned the oven off and just left them in to cool thinking I would be back in 7-8 hours. Well I ended up working 12 hours and you know where this is going. Family comes home and preheats the oven to 450 to bake a pizza, which they didn't put in the oven for about twenty minutes after it was at 450. The cases were on a sheet on the very top rack and they didn't see it until they checked the pizza after 10 minutes. So they get 450 degrees for 30 minutes. 
Just for fun I tumbled them for about 30 minutes and they came out bright but with a very distinctive ring at the bottom which I assume (since I'm fairly new to this) is where the case head was annealed. Correct me if I'm wrong as I am still learning. The two cases on either end are from another batch I tumbled and air dried that evening just to show the difference. Either way I put them in the scrap bag. |
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Posted: 5/11/2017 10:25:27 AM EDT
[#29]
Quote HistoryQuoted:
https://www.copper.org/publications/newsletters/innovations/2000/01/images/phase_diagram.jpg From that phase diagram it appears somewhere near 250c (482f) is where brass enters the "stress relieving zone". Not my diagram but since everything posted on internet is true, it must be gtg. 
<meme removed> dryflash3 250 degrees won't hurt cartridge brass. |
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Posted: 5/11/2017 2:09:52 PM EDT
[#30]
Quote HistoryQuoted:
Now I think this would be an example of overheating. Got called to work a couple of days ago while I was tumbling about 150 RP 223 cases. Instead of leaving them outside in the sun while I was gone I put them in the oven at 220 for 20 minutes. As I was walking out the door there were 3 minutes on the timer so I turned the oven off and just left them in to cool thinking I would be back in 7-8 hours. Well I ended up working 12 hours and you know where this is going. Family comes home and preheats the oven to 450 to bake a pizza, which they didn't put in the oven for about twenty minutes after it was at 450. The cases were on a sheet on the very top rack and they didn't see it until they checked the pizza after 10 minutes. So they get 450 degrees for 30 minutes. http://i1018.photobucket.com/albums/af301/brakeman98/ANNEALED%20223%20CASE%20HEADS_zpsci0rlamj.jpg Just for fun I tumbled them for about 30 minutes and they came out bright but with a very distinctive ring at the bottom which I assume (since I'm fairly new to this) is where the case head was annealed. Correct me if I'm wrong as I am still learning. The two cases on either end are from another batch I tumbled and air dried that evening just to show the difference. Either way I put them in the scrap bag. The taper on the die mouth means that even when tight to the shell holder the die is not touching all the way to the head. |
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