Recent content by alan-c

I'm not encased in a green glow so I'll stick with the tungsten alloy story.

Fantastic! I spent hours searching without finding that. This seems very likely. In the link you provided, their rd17 material is made for boring bars where it's stiffness and high mass reduce chatter -vibration which leaves poor surface finish- when machining deep holes on a lathe. It would...

That was quick- and I never thought of TC. It's not though because it can be filed, although it is quite hard. It appears to be cast then ground to clean up, but not precision ground; this might help as a clue.

I would like to identify a mysteriously dense metal I have in my possession. I bought a big box of engineering bits, along with a lathe, and found what I thought were High Speed Steel tool blanks which felt very heavy. I worked out the relative density and it is an amazing 16.97. The material is...