Home Site Map

 
Go Back   Kitco Forums > The Markets > Numismatic Discussion group
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #11  
Old 06-13-2010, 01:51 PM
HighInBC HighInBC is offline
Member
 
Join Date: Jan 2010
Posts: 4,019
Default

Quote:
Originally Posted by beast_from_the_east View Post
Steel that doesn't melt, doesn't react with acids and is not ferromagnetic is an Utter Nonsense (sic).
"Stainless steel" is a blanket term for countless types of alloys.
Reply With Quote
  #12  
Old 06-13-2010, 02:13 PM
beast_from_the_east beast_from_the_east is offline
Member
 
Join Date: Dec 2008
Posts: 996
Default

Quote:
Originally Posted by Mrpublic View Post
Austentic stainless steel (i.e., 304, 316, etc. or 18-8 generically) resists acids, is not ferro magneitc, and melts at much higher temps. than gold (so a normal torch won't melt it).
The materials you mentioned are corrosion-resistant, compared to carbon steel, but there is no steel that is completely acid-resistant. The so-called "acid-resistant" materials will have corrosion rate below 20 MPY (or somewhere in that neighborhood), but they do react fast enough for you to detect iron in the analyte.

http://www.engineeringtoolbox.com/me...nce-d_491.html

Steel does melt at a higher temperature than gold, but even a propane torch will give you a 2000 C flame, and an acetylene torch will surely melt whatever that stuff is.
Reply With Quote
  #13  
Old 06-13-2010, 02:14 PM
beast_from_the_east beast_from_the_east is offline
Member
 
Join Date: Dec 2008
Posts: 996
Default

Quote:
Originally Posted by HighInBC View Post
"Stainless steel" is a blanket term for countless types of alloys.
Yes, but iron is always there, can't miss it, easy to detect.
Reply With Quote
  #14  
Old 06-13-2010, 02:16 PM
Spock Spock is offline
Member
 
Join Date: Mar 2009
Posts: 975
Default

Quote:
Originally Posted by Will Wong View Post
Page cannot be found. Can you provide a brief write-up? Thanks!
Some crook out of the Chicago area was selling fake Fisch wallets on scambay for ~$65. Check testers and look for a stylized fish as seen in this photo from another kitco thread.

Reply With Quote
  #15  
Old 06-13-2010, 04:00 PM
Silverthorn's Avatar
Silverthorn Silverthorn is offline
Member
 
Join Date: Apr 2008
Posts: 766
Default

Quote:
Originally Posted by beast_from_the_east View Post
and is not ferromagnetic is an Utter Nonsense (sic).
I'd of thought this is the first test you'd do. Why bother wasting acid etc if it fails this.
__________________
Song for BTFD.
http://www.youtube.com/watch?v=uN0UZ1EM-Jk
Reply With Quote
  #16  
Old 06-13-2010, 06:39 PM
Centaur's Avatar
Centaur Centaur is offline
Member
 
Join Date: Oct 2006
Posts: 1,875
Default

Yes, there are more than one type of counterfeit Fisch detectors out there... some individual devices and another with similar 'wallets'. The problem is in the patent violation (South African patent) not in the fact that they don't work just as well... they do.
Reply With Quote
  #17  
Old 06-28-2010, 11:04 PM
Sam_McCord's Avatar
Sam_McCord Sam_McCord is offline
Member
 
Join Date: May 2010
Posts: 51
Default

http://www.fisch.co.za/home.htm
Here is a link to the Fisch website.
Reply With Quote
  #18  
Old 06-28-2010, 11:24 PM
goldpelican goldpelican is offline
Member
 
Join Date: May 2009
Posts: 325
Default

Maybe people wanting to buy scrap gold and profit from it should buy the "real" testing equipment instead of mucking around with $400 toys, and then complaining when they buy something that tested as gold and it's not.

X-Ray Fluorescence testers are where it's at. The very cheapest one I've seen though is $13,000, and handheld ones range from $30k-$80k.
__________________
Disclosure: I am a precious metals dealer and Perth Mint distributor
Reply With Quote
  #19  
Old 06-29-2010, 12:14 AM
Stretch3479 Stretch3479 is offline
Member
 
Join Date: Mar 2009
Posts: 1,294
Default

feel free to rely on a fisch for coins if you wish. I use the tried and true balance, calipers, and published size/weight tables for government coins.
__________________
$x1
You can't take it with you, so give it to me and I'll bring it along when I go there.
Reply With Quote
  #20  
Old 06-29-2010, 12:35 AM
Silvercoin's Avatar
Silvercoin Silvercoin is offline
Member
 
Join Date: Mar 2008
Posts: 7,272
Default

that's why i stick to buying 24k govt issued gold coins only.
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -4. The time now is 03:09 AM.


Copyright@ 2007 Kitco Inc.