[TheForge] Stainless steel Forging?

[Bruce Freeman]

In the chem lab, we use "40%" nitric acid for passivating 304 SS.  The
commercial product is ~70%, so a 50:50 dilution (add acid to water!) is
about right.

Bruce
NJ

>>> PlumDon at aol.com 9/2/2004 7:42:11 PM >>>
 
In a message dated 9/2/2004 11:40:45 AM Eastern Standard Time,  
kaynehdwe at charter.net writes:

We need  to forge some builders hardware for a customer in stainless. 
Its 
been a  while since we have forged stainless in quantity.  Does anyone
have any  
recent experience and can recommend the best type of stainless to use
and the 
 easiest passivating process?



Hi Steve;
 
A dip in nitric acid will do a quite respectable job of passivating  
stainless. You might also recall, because I think you were there, that
when Tony  
Robinson was at Gichners, he essentially passivated the dish he made
for Bill  
Gichner by heavy duty buffing it. He used a relatively coarse compound
and a 2hp  
buffer. At home I believe he uses about a 5hp buffer and 10" wheel. If
it is  
simple hardware, that might work well for you.
 
Regards
Don Plummer
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