Choksi Heraeus - Sterling Silver and its Master Alloys

Semi Finished Jewellery

Sterling Silver and its Master Alloys

Sterling Silver is one of the most unforgiving alloys in jewelry production. To overcome the common casting problems such as red-stain and tarnishing problems, Heraeus has developed a series of sterling silver and its corresponding master alloys. Special additives have been added to the alloys to enhance its oxidation resistance and fluidity resulting better casting performance. Besides, all the sterling silver alloys from Heraeus already contain special ingredients to delay the tarnishing process. Insufficient hardness is an intrinsic weakness of sterling silver jewelry. To solve this problem, Heraeus has developed a new sterling silver of substantially high hardness of 70 HV rendering its application for sophisticated designs possible.

Alloy No		Color	Karat	Application	Hardness (HV)	Melting Temperature/°C
Sterling	Alloy
O-CAG	H-220	White	92.7%	Casting, Rolling, Stone casting	60	960-980
O-AAG	H-PAT	White	92.7%	Casting, Rolling, Stone casting	55	960-980
O-LAG	H-440	White	92.7%	Casting, Rolling, Stone casting	53	960-980
O-ZAG	H-449	White	92.7%	Casting, Rolling, Stone casting	53	960-980
O-DAG	H-330	White	92.7%	Casting, Rolling, Stone casting	55	960-980
O-DAG1	H-330A	White	92.7%	Casting, Rolling, Stone casting	56	960-980
O-BAG	H-336	White	92.7%	Casting, Rolling, Stone casting	56	960-980
O-SAG	H-550	White	92.7%	Casting, Rolling, Stone casting	70	980-1000
O-RAG	-	White	92.7%	Casting, Rolling, Stone casting	60	960-980
H-PS	-	Pink	50.0%	Casting, Stone casting	60	930-940
H-YS	-	Yellow	50.0%	Casting, Stone casting	60	930-940