Q: I see that you list 5 different grades of Tungsten on your site, would you maybe help me choose which is the best for my application?
A: There are two important differences. First, pure tungsten screws are stronger. For example 99.95% tungsten offers 142 ksi UTS vs Class 1 (90% tungsten) 94ksi UTS:
The 2nd key difference us the offering of fasteners. The less tungsten in the alloy the easier it is to machine as pure tungsten is very difficult to work with. So if you don’t necessarily need complete FULL properties of tungsten in terms of its density, strength and temperature stability, the tungsten alloys are a more economical choice and can be machined into more styles of fastener.