Tuesday, August 16, 2011

CrazyEngineers Forum - Chemical & Metallurgy Engineering

CrazyEngineers Forum - Chemical & Metallurgy Engineering

Please help, same metal samples from two sources machine differently

Posted: 16 Aug 2011 05:51 AM PDT

Hi all

I need your help, I've got two suppliers of Naval brass, the materials are the same from each supplier and a chemical analysis has confirmed this, a hardness test has also been completed with no major differences between the two samples found. The problem is that both of them machine completely different. One of them is perfect and machines easily, yet the other is very difficult and breaks a lot of tools.

The suppliers can't understand why this could happen, so I was wondering if anyone here might have any ideas as to how two materials supposedly the same can act differently on a machine?

Rich
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