Master Alloys For Gold, Color : Yellow

We are offering master alloys for gold.
master alloys for carat gold & silver jewellery
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alloy code :- sp 141
composition (wt. %) : ag 23, cu 66, zn + deoxidizers bal.
Carat : 10 - 14
color : american yellow
melting temp of alloy : 890 c
application: the alloy sp 141 is the most widely used alloy for diamond set jewelry. It
imparts yellow color that is very popular in export market. It is usable from 10 to 14 carat
investment cast jewelry. It ensures smooth surface finish and porosity-free finished
products. Reusability of the castings is also very satisfactory.
Recommended practice:
10k 14k
application : casting casting h-made
alloying temp. : 1010c - 1020c 1030c - 1040c
casting temp. : 980c - 1000c 1010c - 1030c
flask temp. [normal cast] : 620c - 640c 620c - 640c
flask temp. [stone cast] : 580c - 620c 580c - 620c
quenching time : 15 - 20 minutes. 15 - 20 minutes
notes:
� the actual casting temperatures and flask temperatures shall be decided by the
parameters like the section thickness of the items (thick, medium or thin), the
overall sizebulk of the cast tree, the design intricacies etc.
Â�¢ as a thumb rule, for thinner sections higher temperatures are selected and for
thicker sections lower temperatures are preferred. At the same time, designs
demanding higher form filling capabilities, higher than normal temperatures are an
obvious choice.
Â�¢ cast tree cleaning & drying procedure: after primary removal of the investment
during quenching, submerge tree in a hot (80-100oc) 50% phosphoric acid
solution for 15-20 minutes. Rinse well with cool water to remove remaining