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High Temperature Marking Methods

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rms1956

rms1956

Materials
Jul 23, 2001
17
I need to mark parts that are going to be heat treated. The parts may be various alloys. Some high temp materials(not much oxidation)and some that will develop significant scale. The marking is mainly for identification purposes but somtimes it is used to help us find certain indications that are present before heat treating. The temperatures range from just above ambient to 1200C. The marking medium will have to go through strict tests to assure it does nothing detrimental to the alloys under temperature. Any ideas about markers, inks/waxes and suppliers would be welcomed
Thanks
 
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You have an application that is perfectly suited to our Electro-Chemical marking process.
My name is John Olmos, I am the Q.A. and Contract Marking Manager for MARKING METHODS, INC.
May I suggest that you visit us at in order to view a list of equipment available.
For your application I recommend our MARK300 ADE kit which allows you to mark your conductive metal products from .0001 to .010 in depth without affecting the strength of the metal.
p.s. Marking can be done before or after heat treating.
 
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rms1956...try using TempilStiks. They are temperature indicating crayons that melt at predetermined temperatures. You can get them from 100F to 2500F. If you are heat treating to 1200F, then you might want to get a 1300F or greater (this would also serve as a secondary QA check on your heat treatment temperature...would inform you if you went over)
 
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Laser marking would work and would eliminate the need to dispose of chemicals used in chem etching. Control Micro Systems make lasers for metal part marking.
 
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Laser engraving using a laser sensitive pigment produces a permanent black mark on stainless steel, steel, and aluminum. It's very easy to use and can withstand very corrosive and other very unfriendily enviroments. You can see some examples at:
 
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I have a client that wants to mark aluminum ingots at 500-550C with a bar code ID.
Anybody knows if laser marking can or has been used at this high temperatures?
 
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I haven't had personal experience with laser marked barcodes being exposed to high temperatures; but, the mark should be OK. You might want to contact Dave Smith at Cerdec @ They have exposed Cerdec laser marks to a variety of adverse conditions. Good Luck!
 
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