On Mon, 30 Apr 2018 18:00:40 -0500, Terry Coombs
wrote:

On 4/30/2018 4:32 PM, whit3rd wrote:
On Monday, April 30, 2018 at 10:40:37 AM UTC-7, Terry Coombs wrote:

molten glass . There's a glass bead maker here that wants me to make
some rods for making the beads . The "working end" of these , that is in
actual contact with the glass , is carbide* , the "handle" is steel .
If you don't want to burn your hand, a section of stainless tube has
less heat conductivity than solid steel...

So, what carbide is it? SiC, B4C, WC are all carbides, one would hope
that it's a bit of tungsten carbide composite (cobalt metal is what the
braze sticks to), but it doesn't hurt to ask. Even C2/C4 could make a
difference.

* At this time I have exactly zero details ... I was just wondering if
there was a hi-temp braze or TIG filler that would work . Right now I
have no idea what the operating temp is , but I do know that when I use
glass as a cover flux for brass/bronze melts it's a very thick liquid at
pouring temps .

I looked through that Hany and Harman list and I see one newer one
made for carbide/steel has a solidus over 1600 deg. F. That ought to
cover you.

--
Ed Huntress