24

Silver Brazing Alloys

Trade neme JIS Composition Solidus℃

liquidus℃

Brazingtemperature℃

Uses

Sil 101 (BAg-4) 40Ag-30Cu-Zn-2Ni ≒ 670 ≒ 780 780～900 Carbide tools, cutting tools, vaporizer, For parts with narrow gap.

Sil 105 (BAg-5) 45Ag-30Cu-Zn ≒ 665 ≒ 745 745～850 Parts of food processing machines, Medical equipment, Chemical equipment, Optical parts.

Sil 106 (BAg-8) 72Ag-Cu ≒ 780 ≒ 780 780～900 Vacuum tube, High vacuum equipment , Electrical equipment for vacuum brazing.

Sil 108、PW108(BAg-7) 56Ag-22Cu-Zn-5Sn ≒ 620 ≒650 650～760

Brazing Steel, Stainless steel, Copper, Copper a l loy, Measur ing ins t ruments , Medica l equipment, Parts of freezer, Food processing machines. PW108 is powder. AP1007 is paste.

Auto PasteAP1007

Sil 1002NC-2S － 35Ag-35Cu-28Zn-2Sn ≒ 655 ≒ 745 745～845

Sil 1006 (BAg-6) 50Ag-34Cu-16Zn ≒ 690 ≒ 775 775～870 Brazing Steel, Stainless steel, Copper, Copper alloy, Communicator, Electrical equipment, Food processing machines.Sil 1020-30 － 50Ag-30Cu-20Zn ≒ 680 ≒ 770 730～830

Sil 1020-5S － 48Ag-27Cu-Zn-5Sn ≒ 640 ≒ 690 690～790Optical equipment, turbine blade, Personal ornaments such as silverworks, Precision component.

Sil 1020-5M － 50Ag-16Cu-Zn-3Ni-4.5Mn ≒ 660 ≒ 690 690～790 Carbide tools, Cutting tools, Carbide chips of

bits, dice.

Sil 1021 － 40Ag-36Cu-24Zn ≒ 650 ≒ 755 755～855Heat exchangers, freezer, Food processing machines. Especally good wettability for stainless steel and nickel alloys.

Sil 1021-IN － 38Ag-34Cu-Zn-2In ≒ 660 ≒ 725 725～825

Sil 1023 － 40Ag-30Cu-Zn ≒ 670 ≒ 730 730～830

Sil 1025 (BAg-20) 30Ag-38Cu-32Zn ≒ 675 ≒ 765 765～870

Sil CD1050-5M － 46Ag-28Cu-20Zn-2.5Mn-0.5Ni ≒ 670 ≒ 690 690～790 Tungsten carbide,Tungsten copper alloy.

Sil 102 － 20Ag-35Cu-22Zn-18Cd ≒ 615 ≒ 750 750～850Steel, Stainless steel, Copper, Copper alloy, Heat exchenger, Electrical equipment, Hand tools, Metal fittings for building.

Sil 103 (BAg-1) 45Ag-15Cu-Zn-24Cd ≒ 605 ≒ 620 620～760 Steel, Stainless steel, Copper, Copper alloy, Air conditioner, Communicator, Precision component.Sil 103E － 40Ag-18Cu-15Zn-27Cd ≒ 615 ≒ 640 640～740

Sil 104 － 35Ag-25Cu-21Zn-17Cd-2Ni ≒ 605 ≒ 745 745～845 Cast iron, Steel, Stainless steel, Copper, Copper

alloy, Pipe works for ships or buildings.

Sil 107 (BAg-2) 35Ag-26Cu-Zn-18Cd ≒ 605 ≒ 700 700～845Steel, Stainless steel, Copper, Copper alloy, Air conditioner, Electrical equipment, Measuring instruments.

Sil 107E － 30Ag-28Cu-Zn-20Cd ≒ 615 ≒ 705 705～805

Sil 109 (BAg-1A) 50Ag-15Cu-Zn-18Cd ≒ 625 ≒ 635 635～760

Sil 1003 (BAg-3) 50Ag-15.5Cu-15.5Zn-16Cd-3Ni ≒ 630 ≒ 690 690～815 Cemented carbide tools such as bits and cutters,

Chemical equipment, Measuring instruments.

Sil 1003-5M － 47Ag-16Cu-Zn-15Cd-1.5Ni-4.5Mn

≒ 630 ≒ 670 670～770 Brazing cemented carbide alloy. Cutting tools, Bits for rock drill, Chips of dice.

Sil CD1003-5M － 46Ag-16Cu-16Zn-15Cd-2Ni-5Mn

▪Standard Sizes and Packages : Rods : φ1.6, φ2.4, φ3.2×500Coiled wire (5kg), By reel (1kg),Long rod (1m length by 1kg),Powder (1kg), Paste (250g)

▪Forms : Rod, Coil, Fine wire (φ0.8, φ1.0 etc.), Foils, Sheets, Preform rings,

Trade names meet JIS Z 3261:1998

▪Trade names shown by blue letters meet RoHS.

▪Alloys with Cadmium.

25

Flux for Silver Brazing Alloys

Flux residue remover : Clean3

Trade name Effective range ℃ Characteristics and uses

F100 550 ～ 800 Brazing temperature is from 650℃ to 800℃

F200 550 ～ 850 Brazing temperature is from 650℃ to 850℃

F300 600 ～ 900 Brazing temperature is from 700℃ to 900℃

F10H 600 ～ 950 For high temperature brazing, induction brazing or heavy works

F10HB 600 ～ 1000 For more high temperature brazing, induction brazing.F10HB keeps effective for a longer time work.

F200H, F10H-8 500 ～ 850 For induction brazing. Little scattering while at bubbling temperature and no adhesion to induction coils.

F10D 350 ～ 700 For automatic feeding. (paste type flux)

F10SU 500 ～ 850 For base metal of stainless steel or nickel alloy.

F10B-3 600 ～ 900Brazing brass gives no change of color preventing from dezincing.

F10B-5 600 ～ 900

F10A-2 500 ～ 800 For aluminum brass. Capable of removing oxide alumina.

FSF 550 ～ 850 Powder type flux.

▪Features : ◦Use for all of steel alloys, copper and copper alloy.◦Donʼt use F10A-2 to stainless steel.◦Brazing temperature depends on effective temperature range of

flux.◦F10B-5 has higher fluidity and lower dezincing than F10B-3.

▪Standard package : ◦Minimum 500g or 1kg. (depends on trade name.)

▪Standard package : ◦2kg (2 bags of 1kg)

Procedure◦Dissolve 1kg of “Clean3”powder in 4 liters of hot water at temperature from 60℃ to 100℃.◦Required concentration and temperature of cleaning solution and soaking time depend on a kind of base metal and

trade number of flux.◦Soaking time is usually from 2 to 4 minutes.◦Cleaning solution can be used repeatedly until detergency decreased.◦Wash works with water or hot water after soaking, as cleaning solution Clean 3 is acid.◦Wear rubber gloves when cleaning. If Clean3 contacts skin, wash it away with water instantly.

▪Flux Properties

Choose flux considering its effective temperature range and brazing conditions.