Harris Products Group, BKFC2500R, Brazing Alloy, Phos-Copper; Flux-Coated, Low Melting Point, 1.03 lb

BLOCKADE® flux-coated phos-copper brazing filler metal has an innovative composition that provides the ability to form a large shoulder or cap at the braze connection. It is a low melting temperature alloy that is very fluid and fast flowing. Best for tight fitting connections under two inches in diameter. Ideal for copper-to-brass applications such as solenoid valves, ball valves, Schrader valves and distributors. BLOCKADE® is self-fluxing on copper. Its lower melting temperature makes it an excellent choice for brass. The flux coating on the wire eliminates the need for manual flux application.

Features

• Phosphorus containing brazing alloys should not be used if the braze is exposed to sulfur or sulfur compounds in service
• Does not contain silver, so significant cost reductions are available
• Often selected to replace silver brazing filler metals for these applications
• Not recommended for brazing steel or other ferrous alloys
• A low cost alternative to silver bearing filler metals
• For brazing copper or brass, as the lower brazing temperature makes it an excellent replacement for many silver-bearing BCuP alloys
• It has a narrow melting range, but its flow characteristics allow operators to “cap” or "build-up" around the finished joint
• Low melting point reduces the likelihood of overheating the brass
• Phosphorus content will form low ductility intermetallic with base metal

• Weight: 1.03 lbs
• Material Composition: Phosphorus 6.0-7.0%, Tin 6.0-7.0%, Silicon 0.01-0.40%, Copper remainder
• Solidus Temperature: 1178 F (637 C)
• Liquidus Temperature: 1247 F (674 C)
• Brazing Range: 1200 F - 1280 F (649 C - 693 C)
• Density: 0.293 lbs/cu.in.
• Compatibility: Copper, Brass
• Specifications Compliance: AWS A5.8 BCuP-9, ASME Sect. IIC SFA 5.8 BCuP-9, ISO 17672 CuP 385
• Pressure-Temperature Test: 600 PSI cyclic @ 300 F for 250,000 cycles; Held 2500 PSI 1 min, no joint failure
• Fatigue Test Result: Failure in copper, not joint

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