Black tungsten carbide ring: isn’t it supposed to be scratch proof ?

February 25, 2010 by admin  
Filed under Mens Titanium Ring

josh7066 asked:


I bought it from Titanium Kay to replace his old band.

http://www.titaniumkay.com/Black-Tungsten-Carbide-7mm-Flat-Wedding-Ring-P103262.html

It's been three weeks and it's badly scratched, revealing the silver color underneath. He works with computers, so nothing hard on the ring. I called the company and they sent another, but now I'm worried the same is going to happen to the new one! Is it a myth that tungsten carbide doesn't scratch? Anyone else have experience with a black tungsten carbide scratching?

Thanks!

Silver Belt Buckle

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Comments

One Response to “Black tungsten carbide ring: isn’t it supposed to be scratch proof ?”
  1. Men’s Diamond Ring

    Tungsten carbide (WC) is always black or grey-black. It is as hard as corundum and could be scratched with emery (corundum) although it would be a lot of work. It can, of course, be scratched with diamond.

    Looking at the web-site, it says that the binder is nickel. That means that the WC grains are set in about 10% (my guess) of Ni which is soft. Maybe they did not anneal it properly.

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