Sgj Silver Copper Eutectic Alloy AG72cu28 Brazing Wire Silver/AG Based Brazing Filler Metal

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Product origin: Xi'an, Shaanxi, China
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US$ 1

Description

SGJ Silver Copper Eutectic Alloy Ag72Cu28 Brazing Wire
Silver/Ag based brazing filler metal


Ag72Cu28 Brazing Alloy Soldering Wire

Silver/Ag based brazing filler metal is a solder with silver solid solution, copper solid solution or Ag+Cu phase as the main body. It has excellent process performance, suitable melting point, good wettability and joint filling performance, high mechanical strength, good plasticity and excellent conductivity of brazing joints. It can be used to braze ferrous and non-ferrous metals, such as copper alloys and titanium alloys.Stainless steel, carbon steel, hard alloy and other materials. It is widely used in refrigeration, lighting, mechanical appliances, instrumentation, cutting tools, aerospace and other industries. Generally, in addition to brazing in a vacuum furnace or in a shielding gas, silver flux is required to obtain an excellent brazing joint.

 

Ag%Cu%Zn%Melting Point-ºCDiameter-mm
7228-779-7790.08~6
5050-779-8500.1~3.0
453025660-720.1~6

Cu based brazing filler metal
are composed of copper as the base and elements that can lower the melting point and improve its overall performance, such as P, Ag, Zn,Sn, Mn, Ni, Co, Ti, Si, B, Fe, etc., mainly pure copper, copper phosphorus, copper tin, copper zinc, copper manganese and other series. Cu based brazing filler metal are widely used in the brazing of copper and copper alloys, carbon steel and cast iron, stainless steel, high-temperature alloys, cemented carbide, etc., with good electrical conductivity, thermal conductivity, and better strength and corrosion resistance, etc.
 
Common grades:BCu-1,CuSn15.6P5.2Ni4.2,CuSnTi
Typical Grades
GB/AWS/ISO
Chemical composition
(wt%)
Range of melting temperature
(ºC)
Minimum brazing temperature
(ºC)
BCu100/BCu-1
Cu≥99.9
1083
1093-1149
CuSn10
Sn9-11/Cu BAL.
840-1000
1020-1090
CuSn19Ti10
Sn18-20/Ti9-11/Cu BAL.
850-880
880-930
BCuP-2/BCu92P
P7.0-8.1/Cu BAL.
710-770
720-843
CuSn3P7
P6-8/Sn2-4/Cu BAL.
630-670
710-810
BCuP-9/BCu86SnP
P6-7/Sn6-7/Cu BAL.
650-700
700-810
BCuP-8/BCu76AgP
Ag17.2-18/P6-6.7/Cu BAL.
643-666
670-686
BCu86SnPNi
P4.8-6.5/Sn7-8/Ni0.5-1.5/Cu BAL.
612-682
682-812
CuSn15.6PNi4.2
P5.2/Sn15.6/Ni4.2/Cu BAL.
585-605
605-800
Cu595/BCu84NiMn
Mn11-13/Ni2-4/Cu BAL.
970-990
1000-1050
CuMn38Ni10
Mn37-39/Ni9-11/Cu BAL.
900-950
950-1070
BCuMnCo
Mn9-11/Co2-4/Cu BAL.
980-1030
1050-1100
BCu54Zn
Cu53-55/Zn BAL.
885-888
910-955
Cu773/BCu48ZnNi
Cu46-50/Ni9-11/Zn BAL.
890-920
938-982
Cu55ZnNiMn
Cu54-56/Ni6-8/Mn4-6/Zn BAL.
910-933
940-1040
 
Nickel-based filler metal
Nickel-based filler metal are composed of nickel as the base with the addition of elements that can lower the melting point and increase its thermal strength, such as chromium, boron, silicon and phosphorus, etc. The main series are nickel-chromium-silicon boron, nickel-silicon boron, nickel-chromium-silicon,nickel-phosphorus, nickel-chromium-phosphorus, etc. Nickel-based filler metal are widely used in the brazing of stainless steel, high-temperature alloys, iron-based alloys, Fe-Ni-based alloys, diamond, cemented carbide, C/C composites, etc. They have excellent resistance to high temperature, corrosion, excellent mechanical properties, etc.
 
Common grades:BNi-2(BNi82CrSiBFe),BNi-7(BNi76CrP)
 
Typical Grades
GB/AWS/ISO
Chemical composition
(wt%)
Range of melting temperature
(ºC)
Minimum brazing temperature
(ºC)
BNi73CrFeSiB(c)/BNi-1
Cr13-15/Si4-5/Fe4-5/B2.75- 3.5/C0.6-0.9/Ni BAL.
980-1060
1066-1204
BNi74CrFeSiB/BNi-1a
Cr13-15/Si4-5/Fe4-5/B2.75-3.5/C0.06/Ni BAL.
980-1070
1077-1204
BNi82CrSiBFe/BNi-2
Cr6-8/Si4-5/Fe2.5-3.5/B2.75-3.5/Ni BAL.
970-1000
1010-1177
BNi92SiB/BNi-3
Si2.75-3.5/B4.0-5.0/Ni BAL.
980-1040
1010-1177
BNi95SiB/BNi-4
Si3-4/B1.5-2.2/Fe≤1.5/Ni BAL.
980-1070
1010-1177
BNi71CrSi/BNi-5
Cr18.5-19.5/Si9.75-10.5/Ni BAL.
1080-1135
1149-1204
BNi-5x
Cr28.5-29.5/Si3.5-4.5/P5.5-6.5/Ni BAL.
965-1035
1050-1125
BNi89P/BNi-6
P10-12/Ni BAL.
875
927-1093
BNi76CrP/BNi-7
Cr13-15/P9.7-10.5/Ni BAL.
890
927-1093
BCo-1
Ni16-18/Cr18-20/Si7.5-8.5/ W3.5-4.5/B0.7-0.9/C0.35-0.45/Co BAL.
1121-1149
1149-1232
 
Silver filler metal
Silver filler metal is an alloy brazing material based on silver or silver-based solid solution. It has the characteristics of low melting point, good wettability and caulking performance, excellent strength, plasticity, electrical conductivity, corrosion resistance, etc. It can be used to braze almost all ferrous and non-ferrous metals except aluminum, magnesium and other low melting point metals, and has excellent wettability for diamond, graphite and carbon, cubic boron nitride ceramic materials, etc. after adding active elements, so it is widely used. In order to improve the process performance or economy and environmental protection of brazing materials, such as lowering the melting point, improving wettability, reducing the silver content, etc., zinc, tin, nickel, cadmium, indium and titanium alloy elements are usually added to the brazing materials to form ternary or multi-alloys.
 
Common grades:BAg-36,BAg-8(BAg72Cu),Ag43.6CuInTi
 
Typical Grades
GB/AWS/ISO
Chemical composition
(wt%)
Range of melting temperature
(ºC)
Minimum brazing temperature
(ºC)
BAg100/BVAg-0
Ag≥99.95
961
961-1038
BAg72Cu/BAg-8
Ag71-73/Cu BAL.
779
779-899
BAg92Cu
Ag91-93/Cu BAL.
779-872
871-982
BAg45CuZnSn/BAg-36
Ag44-46/Cu26-28/Zn23-2 7/Sn2.5-3.5
646-677
677-813
BAg56CuZnSn/BAg-7
Ag55-57/Cu21-23/Zn15-1 9/Sn4.5-5.5
618-652
652-760
BAg25CuZnSn/BAg-37
Ag24-26/Cu39-41/Zn31-3 5/Sn1.5-2.5
688-779
779-885
BAg50ZnCuNi/BAg-24
Ag49-51/Cu19-21/Zn26-3 0/Ni1.5-2.5
660-707
707-843
Ag43.6CuInTi
Ag43.6-Cu29.1-In24.3-Ti 3
540-650
680-800
AgCuTi4.5
Ag68.7-70.7/Ti4-5/Cu BAL.
770-810
830-930
AgCuTi2
Ag68.7-70.7/Ti1.5-2.5/Cu BAL.
780-805
825-927
AgCuTi3.3
Ag68.7-70.7/Ti2.8-3.8/Cu BAL.
780-810
850-930



OFHC (Oxygen-Free High Thermal Conductivity) Copper is the highest purity grade of copper, about 99.99%. Often used as a conductor of electricity.
CTU1 is one of them, which has better forming, resistance to hydrogen embrittlement, and brazing characteristics than C110 ETP. CTU1/C102 has good solderability and corrosion resistance and is used for high current applications.  It also has another characteristic, that is, after special treatment can be welded with ceramic.
High Conductivity (OFHC) Copper characteristics are high ductility, high electrical and thermal conductivity, high impact strength, good creep resistance, ease of welding, and low volatility under high vacuum. Electrical: Electrical Conductors, Klystrons, Microwave Tubes, Transistor Components, Lead In Wire, Coaxial Cables, Copper to Glass Seals in Electronic Appliances, Busbars, Bus Conductors, Wave Guides. Industrial: Tubing, LP Gas Service, Tubing, Medical Gas- Oxygen, Vacuum Seals, Coaxial Tube, Billet Mold Tube, Extrusion Cans for Powder Metallurgy

Brazing Al2O3 ceramics and non-oxygen copper with Ag(72)-Cu(28) brazing filler materials added element Ti, we can get high quality brazed joints, and the highest sealing strength can be up to 103 Mpa
The compound line of fixed expansion to high conduction of electricity and high conduction of heat is a kind of compound sealing material that is made of alloy Fe-Ni or Fe-Ni-Co or Fe-Cr and oxygen-free copper.


ItemPartsMaterialsNote
ACeramic Tube96% aluminaEnds metalizing thin layer of Molybdenum
BMetal AdapterKovar 4J33JIS Code KV-4(Ni33Co17)
CElectrodeOFHC CopperOxygen Free High CondCodeuctivity Copper
DWeld LipKovar 4J33JIS Code KV-4(Ni33Co17)
XBrazing AreaSilver+Copper Eutectic AlloyComplete vacuum brazing


SGJ Ceramic Metal Seal Assemblies Electrode/ Insert/ Conductor/ Insert/ Connecter Vacuum Feedthrough

Designed Water Cooled Feed Through by SGJ-International (Shaanxi Sgj International Co., Ltd.)
CodePartsMaterialsNote
ASS AdapterSS 304 Stainless Steel 304 Coated with Nickel
BSleeveKovar 4J33JIS Code KV-4(Ni33Co17)
CCeramic Tube96% aluminaEnds metalizing thin layer of  Molybdenum
DCapKovar 4J33JIS Code KV-4(Ni33Co17)
EElectrodeOFHC CopperOxygen Free High Conductivity Copper
XBrazing AreaSilver+Copper Eutectic AlloyComplete vacuum brazing

Electrical isolators, consist of metal sleeves brazed to each end of an insulating ceramic tube. They are used to introduce cryogenic fluids into a system and to provide electrical isolation of line components. Vacuum isolators are used to provide an electrical break between the vacuum system and other external components.

 

SGJ isolators typically are made from high-purity alumina ceramics and Metals. The metal hardware is generally a controlled-expansion Kovar 4J33, SUS 304 or OFHC Copper TU1. All materials and braze alloys used are chosen for their specific characteristics and ability to maintain the integrity of the seals for use in demanding applications and environments. The assemblies are brazed together with Silver Copper Eutectic Alloy.


Designed Electrical Isolator by SGJ-International (Shaanxi Sgj International Co., Ltd.)



Kovar Alloy 4J33:
Kovar is a Nickel-Iron-Cobalt, controlled expansion alloy. It's expansion characteristics match alumina ceramics. This alone ensures it is a highly popular controlled expansion alloys for hermetic sealing applications (Mainly used in Ceramic Metal Seal Assemblies)

OFHC Copper TU1:
CTU1/C102 is an oxygen-free copper which has better forming, resistance to hydrogen embrittlement, and brazing characteristics than C110 ETP. CTU1/C102 has good solderability and corrosion resistance and is used for high current applications.

Stainless Steel SUS 304L:
SUS 304L Stainless Steel famous for its resistivity, fall under the category of Stainless Steel Tubes. Threaded, Hot Rolled, Cold Rolled, Heat Exchangers, Annealed, Pickled....  All these products belonging to the SUS 304L Tubes catalog serve as the prime building blocks of electrochemical, shipping, construction and gas industries.

Metallized Alumina Ceramic:
Vacuum brazing of ceramic and metal requires metal coating in the welding area of ceramic. It ensures good air tightness of metal and alumina metallized ceramic brazing joint in vacuum environment. We SGJ have our own unique patented solder formula to ensure the stability and reliability of our products...
 The key of Ceramic-Metal structure based on the vacuum tightness, so called sealing. And , Metallized ceramic bonding area Via vacuum brazing technology is the only solution


Alumina Manufacturing Description:
Alumina Ceramics can be produced in a wide range of purities with additives designed to enhance its properties. Typical purities range from 85 to 99.7% although Precision Ceramics generally work over 99.7% material.

It can be injection molded, die pressed, isostatically pressed, slip cast and extruded. Once fired and sintered, it can only be machined using diamondgrinding methods but prior to sintering advanced green and biscuit machining techniques developed by Precision Ceramics allow more complex components to be manufactured using traditional machining methods. In addition Alumina can be readily joined to metals or other ceramics using metallising and brazing techniques.

Alumina can be machined in green, biscuit, or fully dense states. While in the green or biscuit form it can be machined relatively easily into complex geometries. However, the sintering process that is required to fully densify the material causes the alumiuna body to shrink approximately 20%. This shrinkage means that it is impossible to hold very tight tolerances when machining alumina pre-sintering. In order to achieve very tight tolerances, fully sintered material must be machined/ground with diamond tools. In this process a very precise diamond coated tool/wheel is used to abrade away the material until the desired form is created. Due to the inherit toughness and hardness of the material, this can be a time consuming and costly process.

Precision Ceramics specialises in tight tolerance, highly complex work and has extensive in-house machining facilities - including 4th & 5th axis machining centres, drilling, grinding, milling, polishing, sawing, tapping, threading and turning - to enable us to manufacture Alumina components to the highest specifications.

Precision Ceramics is your Alumina machining specialist for your technical ceramic prototyping & manufacturing needs; we are always happy to use our many years of advanced ceramics experience to provide advice on materials, design, and application. If you would like to buy Alumina plates, rods, tubes or custom machined components, please contact SGJ for more details.


Alumina Electrical Ceramics
Alumina electrical ceramics have low dielectric constant, low dielectric loss, high insulation strength, high volume resistivity, good bending strength, high stability, high compressive strength and good cold and hot shock resistance. It is widely used in temperature controller, insulation parts, thermal equipment, electric heating equipment, iron structure building, shipbuilding and so on. Alumina is the most cost effective and widely used material in the family of engineering ceramics. Extremely High Purity, Temperature & Strength; Excellent Corrosion, High Strength, Wear Resistant, Electronic Insulating, Structural & Metalizing, Porous, Easily Degassed & Machinable. The raw materials from which this high-performance technical grade ceramic is made are readily available and reasonably priced, resulting in good value for the cost in fabricated alumina shapes.
Glazed Alumina Ceramics is a kind of material based on alumina, which is used in thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. Alumina ceramics are widely used. Because of its superior performance, it has been widely used in modern society to meet the needs of daily use and special performance.

SGJ 96% alumina is an easily metallisable ceramic composition:

This material SGJ 96% alumina material is an excellent electrical insulator that can be metallised to facilitate high-temperature brazing of assemblies. This material features:

  • Very high volume resistivity
  • Low loss, constant high dielectric
  • High density, non-porous and vacuum tight
  • Resists abrasive wear and chemical attack

The fact that this material can be metallised makes this a good choice for many ceramic to metal or brazed assemblies such as high-vacuum systems, laser equipment (gas, solid-state and waveguide), X-ray tubes and electron microscopes, microwave windows and insulators in medical and scientific equipment.

SGJ 96% Alumina Ceramic Data Sheet:

 

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