silver brazing rod manufacturer

Silver brazing is on occasion referred to as hard soldering, with the use of a silver alloy based filler. These silver alloys consist of varying contents of elements such as copper, zinc and cadmium in addition to a fixed percentage of silver in silver brazing rod.

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Similar to a soldering process, brazing is practised on Silver Steel High Speed Steel Rods at higher temperatures.Brazing is a technique used by a silver brazing rod manufacturer joining two or more metal items together by melting, followed by which the melted filler metal is poured into the joint. The filler metal will usually have a lower melting point in comparison to the adjoining metal. A major advantage of brazing, as noted by Silver Brazing Alloy Suppliers is the ability to join either same or different alloys with considerable strength.

 

Specifications, sizes and dimensions of Silver Brazing Rods

  • Material Grade :Silver Brazing Rods
  • Diameter : 2mm – 50mm

 

Silver 
Grade of
Brazing Alloy
Nominal Composition %
Melting
Range
International 
Standards
Ag
Cu
Zn
Cd
Others
°C
Saru Silver Alloy Private Limited
DIN:8513
AWS:A5.8
   

 

SILVER 67Cd 67 11 12 10 635-720 L-Ag67Cd
Used for brazing of silver goods made of silver alloys.

 

SILVER 50Cd 50 15.5 16.5 18 620-640 L-Ag50Cd BAg-1a
One of the lowest melting point Silver Brazing alloys available. It has excellent flow characteristics. The highest joint strength can be obtained with this alloy. Has better resistance to corrosion in chlorine, sulphur and steam environments.

 

SILVER 45Cd 45 15 16 24 605-620 L-Ag45Cd BAg-1
This has the lowest brazing temperature range of the BAg filler metals. It also flows more freely into narrow clearance capillary joints. Its narrow melting range is suitable for rapid or slow methods of heating.

 

SILVER 44Cd 44 27 13 15 1P 595-660
Low melting filler metal for brazing electrical contacts and molybdenum or copper-tungsten electrodes.

 

SILVER 43Cd 43 16 20 21 615-620
This has the shortest melting range of any silver brazing alloys. This alloy is regarded as the best brazing alloy by manu brazers. It is particularly recommended where a minimum brazing temperature is desirable to preserve the properties of the parent metals. Ideal where joints have a close fitup and will produce neat joints with optimum ductility and strength.

 

SILVER 40Cd 40 19 21 20 595-630 L-Ag40Cd
 

 

SILVER 35Cd 35 26 21 18 610-700 L-Ag34Cd BAg-2
A free flowing general purpose brazing alloy. Its broader melting range is helpful where clearances are wide or are not uniform. Unless heating is rapid, care must be taken that the lower melting constituents do not separate out by liquation.

 

SILVER 30Cd 30 28 21 21 600-690 L-Ag30Cd BAg-2
Similar to Silver 40Cd but more economical.

 

SILVER 251Cd 25 30 27.5 17.5 605-680 BAg-33
Silver 251, 250 & 20Cd have good fillet forming properties with an ability to bridge wide gaps. Their wide melting range limit their applications. Due to their wide melting range they are somewhat more subject to liquation and may require more care during brazing. Therefore, they are not normally recommended for applications with slow heating rates.

 

SILVER 250Cd 25 35 26 14 605-745 BAg-27
 

 

SILVER 20Cd 20 40 25 15 605-765 L-Ag20Cd
 

 

SILVER 12Cd 12 50 31 7 620-825 L-Ag12Cd
Economical alloy with wide melting range. Like above, preferred for applications having short heating cycles to avoid liquation. Ideal for bridging wider gaps where work pieces are insensitive to heat.

 

SILVER 5Cd 5 7 335-392
Used where alloy having higher melting point and better strength than soft solder is required.

 

Find here silver brazing rod composition, Ready Stock of Silver Rods and Silver Steel Bright Rods
Chemical Formula of Silver Brazing Rods

C Si Mn P S Cr
95/1.25 .40 max. .37 .045 max .045 max. .35 / .45

 

Chemical Properties of Silver Brazing Rods Without Cadmium

CODE
Composition % By Weight
Melting Range

Ag
Cu
Zn
Ni

Sn

Solids

Liquids

KM72

72
28

780

780

KM61

61
29
10

690

735

KM56ZC

56
22
17

5

619

652

KM56N

56
42
2

770

895

KM50NWC

50
20
28
2

660

705

KM45

45
57
25

3

640

680

KM40SN

40
30
28

3

648

709

KM38N

38
32
28
2
648
720

KM30 Ni

30
37
32
1
675
780

KM34SN

34
36
27.5
2.5
630
730
  • KM 72 – Eutectic alloy used in Vacuum / Furnace Brazing.
  • KM 61 – Extensively used in Electrical Industry for Brazing of Contacts.
  • KM56ZC ,KM45 ,KM34SN – Cadmium free alloy for food handling industry.
  • KM56 N – Zinc free alloy for furnace brazing of SS components
  • KM50 NWC – Cadmium free Brazing alloy for Carbide Tip Tools under go PVD Coating.

 

Chemical Structure of Brazing Products for Joining of Carbide To Steel

CODE
 
Composition % By Weight
Melting Range

Ag
Cu
Zn
Cd
Ni
Mn
Co
Sn

Si

Solids
Liquids

KM50

50
15.5
15.5
16
3

632
688

KM50NWC

50
20
28
2

659

707

KM49

49
16
23
4.5
7.5

625

705

KM49Cu

49
27.5
20.5
0.5
2.5

670

690

KM40 Ni

40
30
28
2

670

75

KM43

43
16
20
21

615

779

KM31Ni

31
32.5
15.5
19.5
1.5

675

695

KMCM27

27
38
20
5.5
9.5

680

840

KM25N

25
58
6.5
9
1.5

720

840

KM20N

20
35
26
17
2

652

850

KMCMF

57.5
38.5
2
2

870

930

KMCuN

96.7
2.5
0.2
0.6

1090

1100

KMNB10

49
40.7
10

0.3

920

980

  • KM50 – Most extensively used alloy for Cutting Tools.
  • KM50 NWC, KM49, KM49Cu – These alloys are used for brazed Tools which are further subjected to PVD Coating.
  • KM40 Ni – Popular alloy for Diamond Cutter.
  • KM43 – This alloy is very much suitable for joining of carbide in Work Rest Blades.
  • KMCM27 – This alloy is used in Mining Tools like Buttons Bits, Coalagur Drills, Coal Picks etc. This alloy is also used in joints of carbide for Deburring Tools.
  • KM25 N, KM20 N – High temperature brazing alloys specially used for Deburring Tools.
  • KMCMF – This alloy is equivalent to “F” Bronze alloy and used in manufacturing of Drills Rods.
  • KMCuN – This alloy is popular recognized as Copper Brazing Strip and used in joining of Carbide for Drill Rods.
  • KMNB10 – Very much suitable for Masonary Drills.

 

Composition Chart of Silver Brazing Rods Contain Cadmium

CODE
Composition % By Weight
Melting Range

Ag
Cu
Zn
Cd
Ni

Sn

Solids

Liquids

KM43

43
16
20
21

615

620

KM35

35
26
21
18

607

702

KM40ZC

40
19
21
20
595
630
KM38N
38
32
28
2
648
720
KM30
30
27
23
20
607
710
KM30 Ni
30
37
32
1
675
780
KM30 NC
31
32.5
15.5
19.5
1.5
675
695
KM25 WN
25
30
27.5
17.5
605
720
KM21
21
35
27
17
620
730
KM20
20
38
26
16
610
740

As above products are general purpose Silver Brazing Alloy.

  • KM 43 – Lowest melting, High flow low cost brazing alloy which form very superior brazing joints having very small clearances.
  • KM 35 – Similar to KM43 but slightly sluggish flow suitable for clearances form 0.05 to 0.15 mm
  • KM30, KM25, KM 21,KM 20 – Sluggish flow, low cost brazing alloys mainly used in Refrigeration Industry.
  • KM40 ZC, KM30 NC, KM38 – Medium range, low temp brazing alloy for compressor application.
  • KM30 NI, KM 40 NI – Higher temperature brazing alloys for Copper to MS joints mainly find application in Compressor Industries.

 

specialize in Silver Steel High Speed Steel Rods, to know more about the percentage of silver in silver brazing rod and uses make and inquiry
Other Available Products of Silver Brazing Rods

  • Silver Brazing Round Rod
  • Silver Brazing Forged Rods
  • Silver Rods
  • Silver Brazing Rods
  • Brazing Rods
  • Silver Brazing Square Rods
  • Silver Brazing Flat Rod
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  • Silver Brazing Threaded Rod
  • Silver Brazing Bright Rods
  • Silver Brazing Rectangular Rods
  • Silver Brazing Rods

 

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