Hi Orchid, I’ve been casting some of my filligree designs using the
Argentium 935 pro grain and have noticed some brittleness. I often
form and or forge my designs to some degree after casting and the
brittleness usually appears when forming as a crack in the piece.
When possible I fix the problem by sawing through the crack and
soldering it with hard solder. What I’m wondering is how to prevent
this brittleness in the first place. Sincemy designs are fairly
intricate I cast at flask temps at around 1100-1150Fand the metal at
1850-1880, quite hot but still within the suggested range for this
alloy. I use a ratio of around 70% fresh grain to 30% Argentium wire
scrap and reject castings. Even when using a higher percentage of
freshgrain I have still encountered this brittleness. Otherwise I
love this alloy, I never have fill problems or porosity and the
metal comes out super bright as long as I burn the flask out well and
use mostly fresh grain. Thanks for your thoughts on the matter.