Green Alloy #570. Tech Sheet.

United Precious Metal Refining #570 Green Gold Master Alloy – 9K–18K

Product Description

United Precious Metal Refining's #570 Green Gold Master Alloy is designed for producing 9K–18K green gold jewelry through casting, rolling, and fabrication.

This versatile master alloy produces a light green finished gold color and offers excellent workability for jewelry manufacturing, including sheet, plate, wire, and stone-setting applications.

Alloy Composition

Manufacturer's note: Additional proprietary metals may be present and are not included in the published composition.

Physical & Mechanical Properties

Recommended Casting Temperatures

Pre-Alloying Temperature: 1040–1050°C (1904–1922°F)

Flask Temperature: 510–650°C (950–1202°F)

Recommended Quench Time: 8–12 minutes

Melting & Casting Guidelines

• Melt the #570 master alloy together with fine gold in a clean crucible.
• Use a small amount of boric acid flux when necessary.
• Avoid carbon-based fluxes such as soda ash and saltpeter.
• Stir molten metal thoroughly before pouring to ensure uniform mixing.
• Follow the recommended casting and flask temperatures for the desired gold karat.
• Gypsum-bonded investment is recommended for casting.

Fabrication & Annealing

The #570 alloy is suitable for sheet, plate, and wire fabrication.

• Clean ingots thoroughly before rolling or drawing.
• Reduce the material by approximately 50% between annealing cycles.
• Anneal at 704°C (1300°F) for 20 minutes.
• Quench promptly in water after annealing, following the manufacturer's instructions.
• Clean surface oxidation after annealing using an appropriate jewelry pickling solution.
• Avoid excessive annealing, which can result in grain growth and reduced finished-product strength.

Remelting Recommendations

For remelting, use a combination of scrap and fresh alloy material. The manufacturer's technical sheets provide different recommendations: one specifies 30% scrap with 70% fresh mix, while the newer sheet specifies 50% fresh mix.

Remove surface oxidation from sprues and buttons before remelting.

Manufacturer

United Precious Metal Refining, Inc.

Alloy Number: 570
Color: Green Gold
Application: Casting, Sheet, Plate & Wire Fabrication
Karat Compatibility: 9K–18K

Technical specifications and processing recommendations are provided by United Precious Metal Refining. Actual results may vary depending on equipment, casting conditions, and manufacturing methods.

Warranties are issued by the manufacturer of an item and not our store. If an item you bought is defective within the 30 days of your purchase date, we will gladly replace it for you if a receipt is present. Otherwise, we will be more than happy to help you obtain any information you need in order to properly communicate with the manufacturer of your item. Please note that if you choose to have us correspond with the manufacturer regarding your item, there will be a shipping fee and/or a repair charge if the item's warranty is deemed to be expired. 

We want you to be happy with your purchase and would like to be transparent with our returns policy.

ONLINE returns are accepted within 30 days of the purchase date. All items must be unused and in their original packaging. To return an item, please contact us by e-mail or by phone to obtain an RMA number. We will gladly refund you in the original form of payment. Shipping costs for returns are paid for by customers unless item(s) are deemed to be defective or shipped incorrectly by us. Items that do not have a receipt will be issued a store credit if and when approved for return within the 30 days period. Please note, special orders are non-refundable and non-exchangeable.

STORE returns are accepted within 7 days of the purchase date but will be credited with a store credit. There are no cash returns on items purchased in store. Returns of damaged or defective items will be considered within 30 days of the purchase date.

Please note, any purchases made specifically for Trade Shows will not be authorized for return or exchange.