Brazing Rod

brazingBrazing Rod
The Forney 48493 fluxed low fuming bronze brazing rod is high quality low fuming bronze brazing rod with flux.  The ability to remove flux residue can be an important factor such as in certain HVAC and other fluid transport systems; closed loop systems which cannot be readily cleaned after joining must often be brazed or soldered in vacuum or under a protective atmosphere, or a self-fluxing filler metal such as the copper-phosphorus alloys (BCuP-x) in copper-based assemblies must be used.Okay, I`m getting into torch welding again after about 15 years and I`ve forgotten most of what I ever knew.  In actual practice for copper systems, most soldering is done at temperatures from about 450 degrees F to 600 degrees F, while most brazing is done at temperatures from 1,100 degrees F to 1,500 degrees F. When brazing copper tube, however, the annealing of the tube and fitting that results from the higher heat can cause the rated pressure of the system to be less than that of a soldered joint.Brazing is a metal-joining process whereby a filler metal is heated above and distributed between two or more close-fitting parts by capillary action.  There are two common types of Silver Brazing filler metals for interconnecting tubing/piping/fittings(usually under 3 inch diameter) between heat exchangers and compressors on commercial equipment; 1) Copper to copper joints can be silver brazed with low percent silver” filler metals and no flux is needed if phosphorous is part of the alloy which provides the necessary fluxing action.We are a leading manufacturer of high quality silver brazing alloys that are easy to use, possess high strength impact with short melting ranges, free flowing and versatile.  Flux: The functions of flux are to dissolve the oxides formed during the heating process, shield the alloy and joint from oxidation, provide clean surfaces to promote even spreading of the alloy, and to promote alloy flow by capillary actiona phenomenon associated with surface tension and resulting in the elevation or depression of liquids in capillaries There are many different types of fluxes available for use at different temperature ranges.The brazing process, of which silver soldering is a part, has been used successfully for thousands of years to produce strong leaktight, ductile joints.  Design work (as per IEEE 80/2000) - To do the calculation work we would need fault current, fault current time Kf, length of the electrode (usually 3m - refer IS 3043) , dia of the copper electrode (after calculated permissible current carrying capacity of the rod BS 7040), Soil resistivity, resistivity of the floor above the mat to calculate the step and touch voltage.
Pure silver has superior electrical and thermal properties compared with copper, and the fact that joint gaps are filled by a silver-base material sometimes misleads coil builders and induction heating practitioners into assuming those fillers provide as good or nearly as good electrical contact between brazed components as would be the case with solid copper.The thermal setting adhesive used to equal the strength of aluminum itself is hard to find in DIY amounts and I doubt Mum would be very happy to find letterbox being bonded in her oven but there are plenty of `cold bond` 2 pack adhesives on the shelves that will (when properly used) give you greater strength bonds with no likely hood of separation as solder joints provide.With the temperature of an oxy-acetylene flame more than 3000o F degrees hotter than the 1100 to 1500o F required for brazing, technicians need to hold the torch farther away so as not to melt the base material (copper melts at 1981o F). Also, they must continuously move the torch around the diameter of the pipe to evenly distribute the heat on all sides, as well as to prevent burn through.Developing an ultrasonic soldering procedure to join wear-resistant SiC-diamond ceramic composite to steel for an oil and gas exploration application, overcoming challenges associated with the significant difference in coefficient of thermal expansion of the two materials by creating a low-temperature high-strength bond which exceeded the minimum pushout force requirement by up to 50%.Each of the consultants that we use to provide this range of services to our Members invariably has at least 15 years experience of ‘hands-on` problem solving in one or more of such diverse areas as Aluminium CAB furnace brazing, vacuum- and continuous-furnace brazing, induction, resistance, and flame brazing; this experience having been acquired from their travel both in the United Kingdom and abroad when engaged in training or problem solving visits to users of the technology concerned.
Selection of a suitable process and filler metal includes asking questions such as What will the service temperature and stress conditions be?”, What temperature can the base material experience without unacceptable changes to its properties?”, What filler metal will bond suitably to my base materials?” We even recently discussed the potential of soldering a metal to a polymer, very doable using ultrasonic soldering with the proper selection of materials.Brazing is a joining process whereby a filler metal or alloy is heated to melting temperature (above 450°C; 842°F) and distributed between two or more close-fitting parts by capillary action. During brazing, the molten filler metal diffuses into the base metal components. We consistently braze with a variety of alloys, including nickel, gold nickel, copper and silver alloys.The materials typically brazed are stainless steels, super alloys and a variety of other metallics. Aerospace, medical, nuclear, military, automotive and commercial are the industries that most commonly utilize this type of brazing. We offer services for small parts that fit in the palm of a hand and for very large structures. Our furnace brazing services can eliminate complex post-braze cleaning of the part. Controlled atmosphere brazing typically uses a hydrogen atmosphere, but other gases such as argon or nitrogen are also available. Our gold brazing services are optimized for use in the aerospace, medical, and military industries.Gold brazing is often used with high-temperature alloy and stainless steel assemblies. Gold brazing performed in a vacuum furnace is very efficient because it does not use flux and does not require post-braze cleaning. When vacuum brazing is used, the component will not require extensive post-braze polishing and cleaning. Gold brazing services are optimized for military uses, and can be performed in vacuum and atmospheric furnaces.Nickel brazing services are one of the many NADCAP accredited brazing services we offer. Silver brazing services are one of the many brazing services that can be utilized in industrial furnace brazing. Silver brazing services are popular for joining or bonding many different metallic. We utilize copper, silver, nickel and gold nickel for industrial stainless steel brazing. Stainless steel brazing services can be performed in vacuum furnaces or in standard atmospheres.