Ultrasonic Cleaner

[GillyII]

Chris,

rinse with hot water
and then in the oven for 10-15min at 150degrees.

I can do 300 cases in less than an hour from start to finish.

Paul

Sound good, Little tip DO NOT dry your cases, in the method you describe. this will cause anealing of your brass, causing the molecular structure to alter , & become more malubale..It is a NO NO !!

[rossandjet]

Sound good, Little tip DO NOT dry your cases, in the method you describe. this will cause anealing of your brass, causing the molecular structure to alter , & become more malubale..It is a NO NO !!

I think the annealing process requires considerably more heat than 150deg c

about 400+ just to relieve the stess

[lykoris]

Sound good, Little tip DO NOT dry your cases, in the method you describe. this will cause anealing of your brass, causing the molecular structure to alter , & become more malubale..It is a NO NO !!

this is a cut/paste from the 6mmbr article about annealing brass

full article here - http://www.6mmbr.com/annealing.html

Optimal Case Temperatures for Successful Annealing

Brass is an excellent conductor of heat. A flame applied at any point on a case for a short time will cause the rest of the case to heat very quickly. There are several temperatures at which brass is affected. Also, the time the brass remains at a given temperature will have an effect. Brass which has been "work hardened" (sometimes referred to as "cold worked") is unaffected by temperatures (Fahrenheit) up to 482 degrees (F) (which in celsius is 250 degrees) regardless of the time it is left at this temperature.

At about 495 degrees (F) / 257 degrees (C) some changes in grain structure begins to occur, although the brass remains about as hard as before--it would take a laboratory analysis to see the changes that take place at this temperature.

The trick is to heat the neck just to the point where the grain structure becomes sufficiently large enough to give the case a springy property, leaving the body changed but little, and the head of the case virtually unchanged.

If cases are heated to about 600 degrees (F) 315.5 degrees (C) for one hour, they will be thoroughly annealed--head and body included. That is, they will be ruined. (For a temperature comparison, pure lead melts at 621.3 degrees F).

The critical time and temperature at which the grain structure reforms into something suitable for case necks is 662 degrees (F) 350 degrees (C) for some 15 minutes. A higher temperature, say from 750 to 800 degrees, will do the same job in a few seconds. If brass is allowed to reach temperatures higher than this (regardless of the time), it will be made irretrievably and irrevocably too soft.

Brass will begin to glow a faint orange at about 950 degrees (F). Even if the heating is stopped at a couple of hundred degrees below this temperature, the damage has been done--it will be too soft.