O-condition? 2

[var10]

Hi,

Came across this term when dealing with a supplier and google was not very helpful.

They said they found it very hard working on O-condition aluminium when drilling.

What is o-condition? I am a newbie to materials along with a lot of other things, go easy please.

Thanks,

V.

 

[cloa]

http://www.asminternational.org/portal/site/

http://www/SubjectGuideItem/?vgnextoid=f50045d3f365d210VgnVCM100000621e010aRCRD

Look under Fabrication for 0 condition and above it to get a metallurgical explanation of anneal.

Basicially 0 condition is the aluminium has been heated and cool down to for maximum ductility. The exact treatment depends on the alloy that you are using.

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[dgallup]

You would typically use O-condition when you are going to be doing extensive cold work. Machineability is better with the material in a harder condition.

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[mrfailure]

O is the annealed condition. This obtains the lowest strength temper for wrought products, and improves ductility and dimensional stability for cast products.

Aaron Tanzer

http://www.lehightesting.com

 

[ornerynorsk]

0 condition is generally not considered machineable. Nastiest stuff you can imagine. As other posters have said, 0 condition is great for forming/cold working. It's basically a step up from silly putty, as elongation will run 25% or more depending on the grade, which is why it machines so terribly.

It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.

 

[EdStainless]

Because the material is soft and ductile you tend to get smearing and tearing instead of nice clean cutting in machining operations. The metal will also tend to stick to the tools, which can increase friction and greatly shorten tool life.
You see similar machining issues with annelaed Cu alloys and even austenitic stainless steels.

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Plymouth Tube

 

[var10]

Thanks everyone! what the sub contractor meant was similar to Edstainless.