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Silver Base Series Filler Metals
| | 一、 Note the use of | The sliver-base filler metals are a kind of brazing filler metals of sliver or sliver-base solid solution, with excellent
usability , low melting point , good wettability , great strength , good plasticity , contact and corrosion-resisting . They can be used to brazed all ferrous and nonferrous metals , such as stainless steel , hard alloy etc . At present , they are applied on the fields such as refrigerator , air conditioner , lamps and lantems , instruments and meters , electrical equipments chemical industry and aerospace industry etc.
In order to decrease melting point and the content of sliver , adding copper, zinc , admium , tin , nickel etc. elements
to them consists of three elements or many elements alloy filler metals .These products can adopt all kinds of brazing methods .Generally speaking , you should make up the brazing flux in order to get good braze but for the vacuum state operation and the shield gas state operation .
The sliver base filler metals include "with cadmium" and without cadmium .The sliver base filler metals with
cadmium have a little toxicity .These products can't be applied on the brazed joints which are directly connected with food , drinking water . The working place must wind .
Before brazing , you must clear away all dirt on the brazing place and on the surface of object to be brazed such as
greasy dirt . oxide, and so on , the best brazed joints space are between 0.03mm to 0.075mm .
|  | | 二、 Product specifications | 1、 he brazing wires series :
The plate-shaped brazing wires whose diameters are between 0.5mm to 3.0mm .
2、 The brazing rods series:
The welding rods whose diameters are between 0.7mm to 3.0mm and the flat welding rods whose specification
is 1.3×3.15mm .
3、 The belt brazing metal series:
The belt metals and the flat metals whose thickness is between 0.1mm to 0.25mm , the minute belt metals whose thickness is between 0.1 to 0.3 mm .
4、 The brazing rings series:
Various specifications brazing rings whose diameters are between 0.8mm to 2.5mm and whose internal diameters are more than 3.5mm .
The basic data of silver base series filler metals（1）
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| Brazing Alloys | Chemical Composition（%） | Melting Range℃ | Working Temperature℃ | Trensile σbN/mm2 | Equal to foreign alloy standards | Ag | Zn | Cu | All impurities | Solidus | Liquidus | BAg10CuZn | 9.0~11.0 | 36~38 | Bal | <0.10 | 815 | 850 | 850~930 | 451 |
| BAg20CuZn(Si) | 19~21 | 34~38 | 690 | 810 | 810~880 |
| U.S.A DIA-230 | BAg25CuZn | 24~26 | 33~37 | 700 | 790 | 800~870 | 353 | Japan JISZ.BAg-20A | BAg30CuZn | 29~31 | 30~34 | 677 | 766 | 766~871 |
| U.S.A BAg-20 | BAg45CuZn | 44~46 | 23~27 | 665 | 745 | 743~843 | 386 | U.S.A BAg-5 | BAg50CuZn | 49~50 | 14~18 | 690 | 775 | 750~850 | 343 | U.S.A BAg-6 | BAg72CuZn | 71~73 | / | 779 | 779 | 779~890 | 340 | U.S.A BAg-8 |
The basic data of silver base series filler metals（2）
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| Brazing Alloys | Chemical Composition（%） | Melting Range℃ | Working Temperature℃ | Trensile σbN/mm2 | Equal to foreign alloy standards | Ag | Zn | Sn | Cu | All impurities | Solidus | Liquidus | BAg18CuZnSn | 17~19 | 32~34 | 1.5~2.5 | Bal | <0.10 | 780 | 810 | 810~920 |
| German
Degussa1876 | BAg25CuZnSn | 24~26 | 32~34 | 1.5~2.5 | 680 | 760 | 760~850 |
| German
Degussa2576 | BAg30CuZnSn | 29~31 | 31~33 | 1.5~2.5 | 650 | 750 | 740~840 |
| German
Degussa3076 | BAg34CuZnSn | 33~35 | 26~28 | 2.5~3.5 | 630 | 730 | 730~800 |
| German
Degussa3476 | | BAg38CuZnSn | 37~39 | 26~30 | 1.5~2.5 | 650 | 720 |
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| BAg40CuZnSn | 39~41 | 29~31 | 1.5~2.5 | 650 | 710 |
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| BAg45CuZnSn | 44~46 | 23.5~27.5 | 2.0~3.0 |
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| 640 | 680 | 680~750 |
| German
Degussa4576 | BAg56CuZnSn | 55~57 | 15~19 | 1.5~2.5 |
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| 620 | 655 |
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| BAg56CuZnSn | 55~57 | 15~19 | 4.5~5.5 |
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| 618 | 652 | 650~760 | 330 | U.S.A
BAg-7 | | BAg60CuZnSn | 59~61 | 12~16 | 2.0~4.0 |
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| 620 | 685 |
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The basic data of silver base series filler metals(3)
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| Brazing Alloys | Chemical Composition（%） | Melting Range℃ | Working Temperature℃ | Trensile σbN/mm2 | Equal to foreign alloy standards | Ag | Zn | Cd | Cu | All impurities | Solidus | Liquidus | BAg12CuZnCd | 11~13 | 29~32 | 5~9 | Bal | <0.10 | 620 | 825 | 800~880 |
| L-Ag12Cd | BAg15CuZnCd | 14~16 | 28~30 | 11~13 | 720 | 790 | 800~860 |
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| BAg18CuZnCd | 17~19 | 27~29 | 14~16 | 640 | 745 | 745~850 |
| U.S.A
DIA-148 | BAg20CuZnCd | 19~21 | 24~26 | 13~17 | 605 | 765 | 760~810 |
| German
L-Ag20Cd | BAg25CuZnCd | 24~26 | 26.5~28.5 | 16.5~18.5 | 607 | 682 | 690~790 |
| U.S.A
BAg-33 | BAg30CuZnCd | 29~31 | 20~22 | 19~23 | 600 | 690 | 690~800 |
| German
L- Ag30Cd | BAg34CuZnCd | 33~35 | 23~25 | 19~21 | 595 | 630 | 630~750 |
| German
Degussa3464 | BAg35CuZnCd | 34~36 | 19~23 | 17~19 | 605 | 700 | 700~845 | 450 | U.S.A
BAg-2 | BAg40CuZnCd | 39~41 | 20~22 | 18~22 | 595 | 630 | 630~750 | 400 | German
L-Ag40Cd | BAg45CuZnCd | 44~46 | 14~18 | 23~25 | 607 | 619 | 620~760 |
| U.S.A
BAg-1 | BAg50CuZnCdNi | 49~51 | 13.5~17.5 | 15~17 | Ni2.5~3.5 | 632 | 688 | 690~815 | 420 | U.S.A
BAg-3 |
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