MATERIALS RESEARCH FURNACES, INC Suncook Business Park, Route 28, Suncook, ATH 03275 Tel. (603) 485-2394 - Fax (603) 485-2395 - Web: www.mrf-furmces.com Arc melt furnaces provide a cost saving alternative to resistance or inductance heating furnaces for many applications. Rather than heaters or induction coils, an electric arc is used to heat up and/or melt parts. Our smallest Arc Melt Furnace can instantly reach temperatures over 3000C, and will cool down to room temperature in minutes. The SA-200 Arc Melt Furnace is simple to operate, extremely reliable and has a low acquisition and operation cost. The available options such as load locks, rotating hearth, and more, make this furnace versatile and adaptable. MRF Model SA-200 bell jar arc melting furnace specifications: • Operating temperature: over 3500 Deg. C. • Bottom loading configuration. • 360o viewing through Pyrex glass between top and • bottom brass base. • Vacuum chamber construction • Copper stinger with tungsten electrode. • Copper hearth plate 2.0” dia. (51mm dia.) usable. • Power Supply: 300 Amp @ 60% DS, 15Kva. • Water-cooled power cables • Inert gas system with relief valve. • Pumping system with roughing pump, vacuum gauge and valve. • Low cost • Annealing • Crucible welding • Material densification • High purity melts “TODAY'S FURNACES FOR TOMORROW'S TECH

Major system Components: 1. Furnace Chamber:  The chamber consists of a brass bottom and top with a Pyrex viewing tube.  The chamber top and base are water-cooled to maintain a chamber temperature below 50C (120F) during normal use.  The chamber is rated for vacuum to 10-2 Torr (Mbar)  The chamber top houses the stinger assembly  Access to the furnace for loading and unloading is through the bottom cover.  Clamps are provided to isolate and seal the chamber atmosphere  Vacuum and gas port is supplied.  Three welding glasses are provided, allowing arc viewing from three sides. Arc melt...

The hearth plate (anode) is copper and has an o-ring vacuum seal. Cavity dimensions: 2.0” (51mm) diameter Custom cavities in the bottom hearth plate are provided at no charge An optional rotating hearth is available (1- 60RPM) 4. Inert gas system:  This furnace system was designed to operate in argon.  A pump-out followed by a gas backfill provides a fast way to remove all oxygen from the chamber.  The standard positive pressure for operation is .14 kg/cm sq (2PSIG).  A relief valve and a 30/30 compound gauge (30 PSIG x 30 in. Hg) are located on the chamber. 5. Vacuum System:  A 4CFM (113-LPM)...

• Load Lock • High Vacuum • Oxygen Monitor • Rotating Hearth • Tri-arc (three stingers) (Model TA-200) Utilities ■ Electricity: 15 Kva, 208-240/380-460V/575V/ 3 ph / 50-60 Hz. ■ Water: 7.5 LPM flow (2GPM), inlet temperature 68F (20oC) at 40PSI (3.5 2 kg/cm ) ■ Gas: 10 LPM Argon at 40PSI (3.5 kg/cm2).