Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

How hard is the TD coating?

April 26, 2017Coating hard TD

0

10 Posted

How hard is the TD coating?

1 Answer

0

10 Posted

Actually a coating cannot be measured accurately with a Rockwell ‘C’ test, and the Rockwell C scale does not extend past 68. Another issue is that the diamond plunge test will not record the contribution of a .0002-3″ thick layer on the surface. Thin film coatings like our TD are measured on a Vickers scale from 0-6000. For example, hardened tool steel measures 500-800 (55-65Rc); Chrome is 600-900 (60-66Rc); TiN is 2200-2500 and Vanadium Carbide (VC) or TD is 3500-3800. Our newest product, Nova3 is 3800-4400 on the Vickers scale. If you use a calculation to compare Vickers to Rockwell C, VC is 85-90 Rockwell C, so Nova3 would be greater than 90Rc.