HT-155 FINE STERLING SILVER ALL PURPOSE

# HT 155 is a New Age -master alloy for adding to fine silver to make Sterling Silver. Based on our proprietary Sterling Silver, this master alloy was developed for those who wish to alloy their own sterling. # HT 155 will cast without fire scale. The advantages over standard sterling are: Reduced gas porosity. # HT 155 contains deoxidizers which resist oxygen absorption. Reduced shrinkage porosity. Better solidification characteristics reduce shrinkage porosity.

MIXING Use 92.5% fine silver & 7.5% HT 155. (We recommend using 92.7% fine silver & 7.3% HT 155). Example: 500 gms, add 462.5 gms of fine silver & 37.5 gms of HT 155.

MELTING We do recommend pre-alloying all master alloy with fine silver followed by aggressive stirring & fluxing to assure a uniform mixture before using it for casting.

Step : 1 Pre- Alloying (Fine silver + master alloy) Temperature 1035° - 1045° C

1895° - 1913° F

Step : 2 Casting Temperature for Sterling Grain 980° - 1020° C

1800° - 1865° F

MIXING Use 92.5% fine silver & 7.5% HT 155. (We recommend using 92.7% fine silver & 7.3% HT 155). Example: 500 gms, add 462.5 gms of fine silver & 37.5 gms of HT 155.

MELTING We do recommend pre-alloying all master alloy with fine silver followed by aggressive stirring & fluxing to assure a uniform mixture before using it for casting.

Step : 1 Pre- Alloying (Fine silver + master alloy) Temperature 1035° - 1045° C

1895° - 1913° F

Step : 2 Casting Temperature for ingots or bars 1020° - 1040° C

1868° - 1904° F

Temperature for continuous casting 980° to 1020° C

1796° to 1868° F

Temperature for static casting in bars 1020° to 1040° C

1868° to 1904° F

Ingot molds should be well heated to 121° C / 250° F before pouring metal.