Stay-Silv® black paste brazing flux is an all-purpose, high-temperature, homogenous flux for use in silver brazing. It is formulated to provide smooth flux application, even coverage, and excellent protection during brazing. The addition of boron extends the active life of the flux enabling it to withstand longer heating cycles. This makes it an ideal choice for induction brazing where intense localized heating is a factor, or heavy parts that often require longer heating time. Stay-Silv black flux is recommended for brazing copper and copper alloys, (except aluminum bronze), steel, and other ferrous base metals. Stay It is often used in brazing stainless steel, nickel alloys, and tungsten carbide. Stay-Silv black flux is used with many high silver brazing filler metals of the AWS A5.8 BAg classifications and ISO 17672 class Ag alloys. It is also suitable for use with many phosphorus-copper-silver alloys, (AWS BCuP and ISO CuP), for brazing copper to brass. Black flux turns clear, (transparent), close to brazing application temperature. This is a useful indicator in timing braze wire application.
Features
- High-temperature, all-purpose black flux for silver brazing
- Provides smooth flux application,even coverage and excellent protection during brazing
- Formulated for applications where the work is subjected to rapid, localized heating.
- Ideal for applications where large amounts of refractory oxides may form
- Activity range of 1050°F-1700°F (566°C-925°C)
- Use with stainless steel, carbide, heavy parts, prolonged heating cycles.
- Can also be used with many phosphorus-copper-silver alloys
- Recommended for brazing copper, copper alloys (except aluminum bronze), steel, stainless steel, nickel alloys, tungsten carbide and other ferrous base metals
- Turns clear close to brazing application temperature indicating prime braze wire application
- Conforms to the EU RoHS directive
Applications
- Silver brazing
- Stainless steel
- Heavy parts
- Carbides
Specifications
- Country of Origin : US
- Active Temperature Range : 1050°F-1700°F (566°C-925°C)
- Chemical Composition : Water 15-25%;Potassium Borates 50-75%;Potassium Fluorides 10-20%;Boric Acid 1-3%;Boron 1-3%
- Classification : AWS A5.31 Classification FB3 C;AMS 3411;Federal Specification O-F-499, Type B;EN 1045 Type FH12
- Color : Black
- Made in USA : Yes
- Material : Paste flux
- NSF Compliant : No
- RoHS Compliant : No
- Shelf Life : 2 years from date of manufacture
- Size : 1 lb.
- Warranty : 1 Year
