Casting Master Alloys.

Hygrade Casting

Hygrade Casting manufactures premium Australian-made master alloys developed specifically for professional jewellers and casting houses, with a focus on consistency, workability & reliable casting.

Premium master alloys for the jewellery industry.

Hygrade Casting manufactures premium Australian-made master alloys developed specifically for professional jewellers and casting houses, with a focus on consistency, workability and reliable casting performance.

18 Karat Premium White Master Alloy

Australian-Made Master Alloys

Our master alloys are carefully formulated, granulated, micro-polished, XRF scanned and tested in-house at our Sydney facility before being released for sale.

Developed specifically for casters and jewellers who demand premium Australian-made alloys, reliable casting performance and consistent results from batch to batch.

Developed in collaboration with experienced master bench jewellers, our formulations are designed to perform not only in the casting process, but also throughout the bench. The resulting alloys provide the strength, density and workability required by demanding jewellers, while maintaining excellent casting characteristics.

Alloy Specifications

Karat	18K
Colour	White
Application	Closed Casting Chamber
Finesse	750
Gold Required	0.75
Master Alloy Required	0.25
Nickle, Cadmium & Lead Free	YES
Palladium Content	Average 13%
Magnetic	NO
Denisty As Cast	16.11g/cm³

Casting & Processing

Melting Temperature	1,100 - 1,150 °C
Casting Temperature	1,250 - 1,300 °C
Flask Temperature	600 - 700 °C
Pickling Temperature	60-70 °C
Pickling Time	15-30 Minutes
Scraps Reusage	No More Than 50%

Australian-Sourced Materials

Where commercially available, we source our raw materials from Australian suppliers.

Our alloys contain Australian-mined zinc, copper and silver, while the palladium used in our white-gold master alloys is sourced through accredited Australian bullion suppliers.

This gives us greater control over the materials going into our formulations and supports our commitment to Australian manufacturing.

No Unwanted Additives

None of our master alloys contain:

Lead
Nickel
Cadmium
Cobalt

Our formulations are developed specifically for jewellery applications, with a focus on clean composition, reliable processing and excellent finished-metal performance.

Formulated for the Bench

We have worked closely with master bench jewellers to develop alloys that perform where it matters most, behind the bench.

Our alloys are formulated to provide excellent malleability and workability without becoming excessively soft or brittle. They offer a strong, dense finished metal that can be readily worked, formed, assembled and finished by experienced jewellers.

Compatible with OTEC Präzisionsfinish GmbH

Our master alloys have been carefully formulated to perform in conjunction with OTEC post-processing systems across the workflow, from the compact Eco-Maxis, through larger CF disc finishing machines, to OTEC’s EF electro-polishing systems.

The result is a complete casting and finishing workflow designed to deliver consistent surface quality from cast metal through to final finish.

Available Sizes

Our master alloys are kept in stock and available in:

100g
250g
500g

Ordering Details

Please contact us to order or enquire about our current range of master alloys.

See separate excel table & pluck out the correct one, make the table look nice.