JWG NOBLE WHITE TYPE 3 CROWN & BRIDGE ALLOY JWG is a noble type 3 crown and bridge casting alloy. It is one of a series of three white precious silver palladium casting alloys offered by Jensen Industries. JWG features high strength, light weight, low cost, and melts, casts, finishes and polishes like a casting gold. The high melting range of JWG allows processing with the same investment, burnout and casting techniques as ceramic alloys. Tensile Elongation Tensile Yield Strength Ultimate Tensile Strength Au & Pt group - 27% Classification - Noble PROCESSING TECHNIQUE SPRUING The indirect method is recommended for multi-units. Use an 8 gauge runner bar with 10 gauge connectors. If preferred, the direct method may be used on both single units and small bridges. Use a 10 gauge sprue 1/4” (6mm) to 3/8” (9mm) long. Sprues longer than 3/8” (9mm) should have a reservoir 1/16” (1.5mm) from pattern. Patterns should be a maximum of 1/4” (6mm) from top of investment. A phosphate-bonded high heat investment without carbon is recommended. Wind casting arm one turn more than normal. Use a multi-orifice torch with 10 psi gas and 20 psi oxygen. As JWG melts, a cloudy surface will appear. Continue heating until the cloudy surface clears. Release casting arm. The casting temperature is 2175ºF (1190ºC). DO NOT OVERHEAT. Bench cool - quench when bottom of button turns dark. Remove castings from investment. Blast with aluminum oxide to remove investment particles and oxidation. Finish and polish using standard techniques. Solder: 1400 Solder Flux: Brown Fluoride Flux Jensen Industries, Inc. 50 Stillman Road North Haven, CT 06473 USA Jensen GmbH Gustav – Werner Str. 1 D-72555 Metzingen Freecall: 0800-8 57 32 30 [email protected] www.jensendental.de Jensen Technical Service is available 8:00 AM - 8:00 PM EST by calli