[TheForge] hastalloy

[Bruce Freeman]

You don't necessarily have to vaporize metal to get it into fumes. 
Oxides may form well below the vaporization point of the metal.  These
may be carried into the air as smoke, even if they do generally have
higer vaporization points than the pure metal.

In other words, be careful.

Bruce
NJ

>>> jbin at well.com 1/29/2005 12:16:50 PM >>>
Here is the composition of Hastelloy C-22 :
  Ni 51.6 , Cr 21.5, Co 2.5 , Mo 13.5, W 4.0 , Fe 5.5, Mn 1.0, Si 0.1,

C 0.01, V 0.3
There are several other Hastelloy alloys but they are all roughly 
similar in that they are all high nickle and chrome super alloys with 
varying maximum use temperatures.

I seriously doubt that you will be able to vaporize any of the 
constituents in a coal forge fire. Two mentioned already are Vanadium 
which melts at 3470 F and doesn't boil until 6062 F  and Nickel melts 
2647 F and boils at 4946 F so you will never reach the vaporization 
temperatures in a coal forge. And I seriously doubt you could scrape 
through the oxide layer on it with a poker that oxide eats grinding 
belts for lunch it is tough stuff. This is not to make light of the 
health hazards that nickel or vanadium present  but you are in much 
greater danger grinding and arc welding them than using it in a fire 
pot. For grinding and arc welding you need to have good ventilation 
and housekeeping practices or you will definitely endanger your 
health.

-- 
Jim Binnion

James Binnion Metal Arts
Phone (360) 756-6550
Toll Free (877) 408 7287
Fax (360) 756-2160
http://www.mokume-gane.com 
jbin at mokume-gane.com 
Member of the Better Business Bureau
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