Brazing

Cadmium Free Grades

General-purpose, free flowing, low temperature silver brazing alloys without any cadmium. For joining similar and dissimilar metals that are easy to use and give strong and neat joints. Silver offers these alloys in a wide range of compositions to suit specific applications. Available in Wires and Rods, Strips, Wire Flattening, Wire Preforms, Strip Preforms, Granules and Spheres. With the help of the chart below, identify and compare alloys of our Silver Based Cadmium Free Alloys suited to your needs.


NT Silver
Grade of
Brazing Alloy
Nominal Composition % Melting
Range
International
Standards

Ag

Cu

Zn

Others

°C

DIN:8513

AWS:A5.8


NT Silver 925

92.5

7.3

-

0.20Li

760-890

-

BAg-19
Used in higher brazing temperature applications, where precipitation-hardening heat treatment in brazing are combined.


NT Silver 85

85

-

-

15 Mn

960-970

L-Ag85

BAg-23
A high temperature free flowing filler metal. Mainly used in brazing stainless steel, nickel based, cobalt based alloy or high temperature applications.


NT Silver 83

83

15

2

-

780-830

L-Ag83

-
Mainly used for brazing and braze welding of precision silver equipment or precision silver linings of chemical equipments.


NT Silver 75

75

22

3

-

740-775

L-Ag75

-
For Brazing of objects made of silver alloys which are to be enameled afterwards.


NT Silver 72

72

28

-

-

779

L-Ag72

BAg-8
For Ferrous and non-ferrous base alloys, especially for thin sections of stainless steel.


NT Silver 71.5

71.5

28

-

0.5Ni

780-795

-

-
Suitable for both ferrous and non ferrous alloys.


NT Silver 70

70

20

10

-

690-740

-

BAg-10
Used particularly for joining sterling silver. The color, after brazing, approximates the color of sterling silver.


NT Silver 67

67

23

10

-

700-730

L-Ag67

-
Used for brazing of silver goods made of silver alloys..


NT Silver 65

65

28

-

5Mn, 2Ni

750-850

-

-
For brazing, invar kovar and similar alloys to copper, in vacuum tubes; as jet engine rubbing seals.


NT Silver 64

64

20

16

-

690-720

L-Ag64

BAg-9
Used particularly for joining sterling silver. The color, after brazing, approximates the color of sterling silver.


NT Silver 63

63

28.5

-

2.5Ni, 6Sn

690-800

-

BAg-21
Used in brazing 300 and 400 series stainless steels as well as the precipitation hardening nickel and steel alloys.


NT Silver 61

61

29

10

-

690-735

-

-
Is particularly suitable for joining Electrical Components requiring high electrical conductivity and give a close colour match of silver. Also used for brazing silver goods.


NT Silver 601Sn

60

23

14

3Sn

620-685

L-Ag60Sn

-
Used for brazing of silver goods made of silver alloys.


NT Silver 60

60

26

14

-

695-730

L-Ag60

-
For brazing monel, nickel alloys and silver


NT Silver 60Sn

60

30

-

10Sn

600-720

-

BAg-18
Its tin content, helps promote wetting stainless steel, nickel base alloys and carbon steel. Is specially for vaccum applications and brazing small parts most suited in protective atmosphere.


NT Silver 575

58

32

-

7Sn, 3Mn

605-730

-

-
A free flowing filler metal used in brazing tungsten carbide, which is subsequently titanium nitrided.


NT Silver 56

56

22

17

5Sn

620-650

-

BAg-7
A low melting brazing filler metal with good flow and wetting properties used for food equipment where cadmium must be avoided. Used to minimise stress corrosion cracking of nickel or nickel base alloys at low brazing temperature. Is used by the dairy and food industry. After brazing gives a closer match with metals such as stainless steel.


NT Silver 55Sn
(Cd Free)

55

21

22

2Sn

620-660

L-Ag55Sn

-
Is for use on any steels, copper and copper alloys, nickle and nickle alloys.


NT Silver 561

56

42

-

2Ni

770-895

-

BAg-13a
Advantageous where volatilization os objectionable in furnace brazing.


NT Silver 54

54

40

5

1Ni

725-855

-

BAg-13
Atmosphere furnace brazing for high temperature applications, such as, on jet engines.


NT Silver 5050

50

50

-

-

750-870

-

-
For applications similar to silver 72 except where better gaps filling is needed.


NT Silver 50N
(CdFree)

50

20

28

2Ni

660-750

-

BAg-24
Is a free flowing, cadmium free brazing filler metal, suitable for use in joining 300 series stainless steels (particularly food handling equipment and hospital utensils) and small tungsten carbide inserts in cutting tools.


NT Silver 50
(Cd Free)

50

34

16

-

688-774

-

BAg-6
Used especially for brazing in the electrical industry. Also used in the dairy and food industries, where the use of cadmium containing filler metals is prohibited. Since it has a broad melting range and is not so free flowing, it is a better filler metal for filling wide joint clearances or forming larger fillets.


NT Silver 45Sn

45

27

25

3Sn

640-680

L-Ag45Sn

BAg-36
Low temperature, free flowing, cd-free alloy.


NT Silver 45
(Cd Free)

45

30

25

-

670-740

L-Ag44

BAg-5
It is an excellent filler metal for brazing brass parts (such as ships piping, band instruments, aircraft engine oil coolers, brass lamps etc).


NT Silver 43
(Cd Free)

43

37

20

-

690-770

-

-
Used for brazing of ferrous and non ferrous metals other applications similar to Silver 45.


NT Silver 40Sn

40

30

28

2 Sn

640-700

L-Ag40Sn

BAg-28
Is free flowing alloys for ferrous, non-ferrous and dissimilar metals with good fluidity.


NT Silver 40
(Cd Free)

40

30

30

-

675-725

-

-
For copper base alloys, mild steel, nickel and monel, and wear a narrow melt range is desired.


NT Silver 4002

40

58

-

2Ni

-

-

-
 


NT Silver 38Sn

38

32

28

2Sn

650-720

-

BAg-34
A free flowing cadmium free filler metal used with ferrous and non ferrous base metals.


NT Silver 35
(Cd Free)

35

32

33

-

680-750

-

BAg-35
Intermediate temperature filler metal for use with ferrous and non ferrous materials.


NT Silver 34Sn

34

32

27

3Sn

630-730

L-Ag34Sn

-
Good wetting and flow properties. The presence of tin improves the fluidity. Used for the assembly of copper tubes in the refrigeration industry. Also used on equipment and containers in the food industry.


NT Silver 30
(Cd Free)

30

38

32

-

680-765

L-Ag30

BAg-20
It possesses good wetting and flow characteristics. Moderate ductility limits joint design and applications.


NT Silver 30Sn

30

36

32

2 Sn

650-750

L-Ag30Sn

-
Is free flowing alloys for ferrous, non-ferrous and dissimilar metals with good fluidity.


NT Silver 25Sn

25

40

33

2Sn

680-760

L-Ag25Sn

BAg-37
An economical filler metal for ferrous and non ferrous joints, not requiring high ductility or impact strength.


NT Silver 25
(Cd Free)

25

41

34

-

700-800

L-Ag25

-
An economical low silver filler metal used for ferrous metals, stainless steel, copper, brass except aluminium, used in mechanical and electrical industries, refrigeration, musical instruments.


NT Silver 25Ni

25

38

33

2Ni, 2Mn

705-800

-

BAg-26
An economic filler metal suitable for tungsten carbide, stainless steel as steel.


NT Silver 20

20

44

35.9

0.1Si

690-810

L-Ag20-

-
For simultaneous brazing and heat treating of steels.


NT Silver 12
(Cd Free)

12

48

40

-

800-830

L-Ag12

-
For torch brazing on carbon and stainless steel copper, nickel and its alloys. Used in boiler works for drawn components.


NT Silver 09

9

53

38

-

765-850

-

-
For copper base alloys such as band instruments; or joint brazing / cyanide case hardening of steels


NT Silver 07

7

85

-

8Sn

665-985

-

-
Used when heat treatment follows brazing, as a lower melting alloy then copper, or in vacuum systems.


NT Silver 5
(Cd Free)

5

55

39.9

0.1Si

820-870

L-Ag5

-
Brazing nichrome resistance elements, or simultaneous brazing and heat treatig of steels.


NT Silver 4
(CdFree)

4

56

39.7

0.3Si

870-890

-

-
Brazing nichrome resistance elements, or simultaneous brazing and heat treatig of steels.


NT Silver 2

2

58

39.9

0.1Si

880-890

-

-
Used as a alternative to brass alloys in automated brazing operations, and for brazing of tungsten carbide tips to tools and saw blades. The small addition of silver enhances their flow characteristics.


NT Silver 1

1

60

38.9

0.1Si

890-900

-

-
Used as a alternative to brass alloys in automated brazing operations, and for brazing of tungsten carbide tips to tools and saw blades. The small addition of silver enhances their flow characteristics.