# UNITED CASTING ANTIQUE BRONZE ALLOY # 341

**Composition : 10% TIN, 90% COPPER**

UNITED’S **# 341 Casting Antique bronze** is a **Reddish - Yellow** **antique bronze** designed to cast jewelry samples, models, belt buckles, art objects, etc. It finishes to a Standard **14 K** color and **easily solders** **with silver or low gold formulas. # 341** has a **much better resistance** **to tarnish than brass alloys, as well as a harder surface. # 341** also **contains a silicon de-oxidizer for clean casting.** Using 5 % by weight of **# 99** replenisher with this alloy **greatly improves the castability and** **tarnish resistance of this alloy. Specific Gravity of this alloy is 8.76.**

## MELTING

### Casting Temperature

$$
\begin{array}{l}{{1020^{\circ}\;\mathrm{C}-1030^{\circ}\;\mathrm{C}}}\ {{\mathrm1868^{\circ}\,\mathrm{F}\cdot1886^{\circ}\;\mathrm{F}}}\end{array}
$$

**NOTES: Melt temperature may vary with type of unit.  This alloy is** **designed for casting only.  # 341 Antique bronze should not be used** **for gold casting!  # 341 Antique bronze should not be cyanide gold** **plated, use acid gold plating unless nickel subplate is used.  For # 341** **Antique bronze, we recommend an ultrasonic cleaning solution** **called BCR available from OKITE, phone # 1-800-526-4473 ext.** **2411.  Some kind of Anti -Tarnish coating on the jewelry is highly** **recommended since the tarnish resistance of this alloy is poor.**  
**Please visit :** **http://www.permalac.com/products.asp?gclid=CPqyxbT4obUCFUO K4AodUgIAEQ** **for more information on lacquering products.**

## FLASK TEMPERATURE

Normal recommended temperature in the range of **590° C to 700° C**  
**593 TO 676C / 1100 T0 1250 F –** VACUUM CASTING  
**482 TO 537 C / 900 TO 1000 F -**CENTRIFUGAL CASTING

$$
590^{\circ}\,\mathrm{C}
$$

$$
700^{\circ}\,\mathrm{C}
$$

## FLUXING

Boric Acid is the recommended flux.  Use as little flux as possible.  Do not use carbon fluxes or any fluxes designed for refining; i.e., soda ash, saltpeter, etc.  Avoid flux in bottom pour automatic casting units.

**QUENCH TIME 15 – 20 minutes.**

## INVESTMENT

## REMOVAL

Most standard investment removers will successfully remove the investment powder. Fluoric-based investment removers are the best for removing the silicon oxide invisible coating.  **UNITED’S Brite-Cast™ Investment Remover works effectively in** **removing fire scale as well as preventing stress corrosion or surface** **damage of the cast piece.**

## TECHNICAL

## ASSISTANCE

Always available… Call 1-800-999-3463 / 1-800-999-FINE  
E-mail / **doc@unitedpmr.com**  
Web-Site / **www.unitedpmr.com**

**2781 Townline Road, Alden, NY 14004, USA.**

**Phone : (800) 999-3463; International Phone : +1-(716)-683-8334**

**Fax :    (800) 533-6657; International Fax : +1-(716)-683-5433**
**E mail:** **sales@unitedpmr.com** **; Website:** **www.unitedpmr.com**