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Description

Get clean, durable casts with this zinc-free, true bronze casting grain. It delivers a deep ancient bronze color with rich red undertones and takes patina beautifully.

Sold in five pound packages.

Applications
Any casting method.

Casting and Cleaning
In general, your casting temperature should be 100˚F (37.7˚C) above the liquidus point (somewhat hotter if the castings are intricate). Use a small amount of high-quality flux when melting with an open flame. We recommend Matt’s Casting Flux™. For further cleaning, mechanical means are recommended.

Re-Using
If you plan to re-use ancient bronze castings, remove the copper oxides from the surface in a pickling solution or by mechanical means. We recommend a minimum 1:1 ratio of new grain to used bronze. All re-used bronze should be clean and free of debris.

Composition
All ingredients are kept in an oxygen-reduced atmosphere during the melting and pouring process to ensure optimum deoxidation.

The grain is composed of 90% copper with some tin; it fits into the CDA#90700 category.


Specifications:
  • Specific gravity (g/cm3) : 8.8
  • Country of origin : United States
  • Form : Casting grain
  • Solidus (melt) temperature : 1,750°F (954°C)
  • Liquidus (flow) temperature : 1,968°F (1,076°C)
  • Metal type : Bronze

Please Note:

• Casting temperatures are approximate and need to be adjusted for each particular alloy, machine and application.
• Due to the manufacturing process of casting grain, the grain will vary in shape and size.
• For more information regarding the use or composition of this material, please refer to the reference sheet provided below.


Catalog page: 2020-2021 Tools and Equipment Catalog p. 814