brazing alloys

 
 ReferenceAgCuZnSnCdPOthers
Cadmim-free alloys
 56 Sn5622175   
 55 Sn5621222   
 45 Sn4527253   
 40 Sn4030282   
 38 Sn383128.82.2   
 34 Sn3436273   
 32 Sn323530.52.5   
 30 Sn3036322   
Cadmim-bearing alloys
 50 Cd5015.516.5 18  
 48 Cd481527 10  
 45 Cd451516 24  
 42 Cd421716 25  
 40 Cd401921 20  
 38 Cd382118.5 22.5  
 35 Cd352621 18  
 34 Cd342520 21  
 30 Cd302821 21  
 23 Cd2364.529 13.5  
 20 Cd203929 12  
 40 Cd Si401920.8 20 Si 0.2
 30 Cd Si302820.8 21 Si 0.2
 21 Cd Si2135.426.6 16.6 Si 0.4
Ternary alloys
 63 Ter632413    
 53.5 Ter53.53115.5    
 44 Ter443026    
 25 Ter254134    
 20 Ter Si204435.8   Si 0.2
Special alloys
 50 Cd Ni5015.515.5 16 Ni 3
 49 Mn491623   Ni 4.5 / Mn 7.5
 72 Cu7228     
 68 Ni6825.5 6  Ni 0.5
 54 Ni54405   Ni 1
Phosphorus bearing alloys
 15 P1580   5 
 6 P Ni686.6   7.3Ni 0.1
 5 P588.5   6.5 
 2 P291.3   6.7 
 1 P192.5   6.5 
 080 P 92   8 
 078 P 92.2   7.8 
 075 P 92.5   7.5 
 068 P 93.2   6.8 
 062 P 93.8   6.2 
 07 P Sn 89 4 7 
 06 P Sn 86.25 7 6.75 
 56 Sn55 Sn45 Sn40 Sn38 Sn34 Sn32 Sn30 Sn
Physical & Chemical characteristics
Nominal composition in % Ag5655454038343230
Cu2221273031363536
Zn1722252828.82730.532
Sn52322.232.52
Melting range (°C)620-650630-660640-680650-710660-700630-730660-740665-755
Density9.59.29.19.18.88.78.68.8
Mechanical characteristics
Tensile strength in MPA350510500500520500500500
Elongation in %2511141718202018
Available forms
Wire✔✔✔✔✔✔✔✔
Rod✔✔✔✔✔✔✔✔
Flux-coated rod ✔✔ ✔✔  
Preform✔✔✔✔✔✔  
Strip ✔      
Powder✔✔✔✔✔✔✔✔
Paste✔✔✔✔✔✔✔✔
Standards
AFNOR56A1     32A1 
AWSB Ag-7  B Ag-28    
BS Ag14 Ag20   Ag21
DIN  L-Ag45SnL-Ag40Sn L-Ag34Sn L-Ag30Sn
Main properties
Narrow melting range✔✔✔ ✔   
Excellent fluidity✔✔✔ ✔✔  
Good capillarity action✔✔✔ ✔   
Good gap filling properties   ✔✔✔✔✔
 50 Cd48 Cd45 Cd42 Cd40 Cd38 Cd35 Cd34 Cd
Physical & Chemical characteristics
Nominal composition in % Ag5048454240383534
Cu15.515151719212625
Zn16.52716162118.52120
Cd181024252022.51821
Melting range (°C)620-635625-647605-620610-620595-630612-686610-700610-670
Density9.299.19.1998.98.9
Mechanical characteristics
Tensile strength in MPA450480450450420390420400
Elongation in %3526303030282930
Available forms
Wire✔✔✔✔✔✔✔✔
Rod✔✔✔✔✔✔✔✔
Flux-coated rod    ✔ ✔ 
Preform✔✔✔✔✔✔✔✔
Strip✔✔✔✔✔✔✔✔
Powder✔✔✔✔✔✔✔✔
Paste✔✔✔✔✔✔✔✔
Standards
AFNOR50A148A145A1 40A1 35A1 
AWSB Ag-1 a B Ag1   B Ag-2 
BSAg1  Ag2Ag10  Ag11
DINL-Ag50Cd   L-Ag40Cd   
Main properties
Narrow melting range✔✔✔✔✔   
Excellent fluidity✔✔✔✔✔   
Good capillarity action✔✔✔✔✔✔✔✔
Good gap filling properties     ✔✔✔
 30 Cd23 Cd20 Cd40 Cd Si30 Cd Si21 Cd Si
Physical & Chemical characteristics
Nominal composition in % Ag302320403021
Cu2834.539192835.4
Zn21292920.820.826.6
Cd2113.512202116.6
Si   0.20.20.4
Melting range (°C)600-690600-770600-760595-630600-690610-750
Density8.88.68.598.88.5
Mechanical characteristics
Tensile strength in MPA380350380420380380
Elongation in %303032303032
Available forms
Wire
Rod
Flux-coated rod    
Preform
Strip   
Powder
Paste
Standards
AFNOR30A1    21A1
AWSB Ag-2a     
BSAg12     
DINL-Ag30Cd L-Ag20Cd   
Main properties
Narrow melting range     
Excellent fluidity  
Good capillarity action     
Good gap filling properties  
 63 Ter53.5 Ter44 Ter25 Ter20 Ter Si
Physical & Chemical characteristics
Nominal composition in % Ag6353.5442520
Cu2431304144
Zn1315.5263435.8
Si    0.2
Melting range (°C)690-730710-750675-735700-800690-810
Density9.59.38.98.58.4
Mechanical characteristics
Tensile strength in MPA410380400450400
Elongation in %3025251520
Available forms
Wire
Rod
Flux-coated rod    
Preform
Strip   
Powder
Paste
Standards
AFNOR63A1 44A1  
AWS  B Ag-5  
BS  B Ag-5  
DIN  L-Ag44 L-Ag20
Main properties
Narrow melting range   
Excellent fluidity
Good capillarity action     
Good gap filling properties  
 50 Cd Ni49 Mn72 Cu68 Ni54 Ni
Physical & Chemical characteristics
Nominal composition in % Ag5049726854
Cu15.5162825.540
Zn15.523  5
Sn   6 
Cd16    
Mn 7.5   
Ni34.5 0.51
Melting range (°C)635-655625-705778675-753713-857
Density9.28.9109.89.6
Mechanical characteristics
Tensile strength in MPA450550350350400
Elongation in %2525332530
Available forms
Wire✔✔✔✔✔
Rod✔✔✔✔✔
Preform✔✔✔✔✔
Strip✔✔✔  
Powder✔✔✔✔✔
Paste✔✔✔✔✔
Standards
AFNOR50A2 72A1  
AWSB Ag-3B Ag-22B Ag-8 B Ag-13
BSAg9Ag18Ag7  
DINL-Ag50CdNiL-Ag49L-Ag72 L-Ag20
Main properties
Narrow melting range✔ ✔  
Excellent fluidity✔✔✔✔✔
Good capillarity action✔✔ ✔ 
Good gap filling properties ✔  ✔
 15 P6 P Ni5 P2 P1 P080 P
Physical & Chemical characteristics
Nominal composition in % Ag156521 
Cu8086.688.591.392.592
P57.36.56.76.58
Ni 0.1    
Sn      
Melting range (°C)650-800645-725630-780645-818650-820714-742
Density8.48.28.28.28.28
Mechanical characteristics
Tensile strength in MPA530650650550550500
Elongation in %1088662
Available forms
Wire
Rod
Preform  
Strip     
Powder
Paste
Standards
AFNOR50B107B3  07B208B1
AWSB CuP-5     
BS   CP2  
DINL-Ag15P    L-CuP8
Main properties
Self-fluxing with copper
Good ductility 
Good capillarity action    
Good gap filling properties    
 0.78 P0.75 P0.68 P0.62 P0.7 P Sn0.6 P Sn
Physical & Chemical characteristics
Nominal composition in % Ag      
Cu92.292.593.293.88986.25
P7.87.56.86.276.75
Ni      
Sn    47
Melting range (°C)714-756714-770714-820714-880670-710650-700
Density888.18.17.97.9
Mechanical characteristics
Tensile strength in MPA500500500550850800
Elongation in %2345151
Available forms
Wire
Rod
Preform    
Strip      
Powder
Paste
Standards
AFNOR08B1 07B1   
AWS CP3 CP6  
BSL-CuP8 L-CuP7L-CuP6  
DINL-Ag15P    L-CuP8
Main properties
Self-fluxing with copper
Good ductility      
Good capillarity action   
Good gap filling properties    
ReferenceAcive range (°C)ApplicationsPackagingPacking (Kg)
Universal Fluxes
U1500-800Universal flux. Particularly recommended for steel.Paste0.15-1.2-9
U2
U25
500-750Universal flux. Particularly recommended for stainless steels and cooper alloys.Paste
Powder
0.15-1.2-9
0.09-0.6-30
U3
U35
500-750Universal flux. Particularly recommended for parts to be brazed in vetical condition.Paste
Powder
0.15-1.2
0.6-5
Special application fluxes
S1500-800Flux with boron. Recommended for the assembly of difficult stainless steels and refractory metals. Developed for brazing tungsten carbides with 50 Cd Ni brazing alloy.Paste0.15-1.1
S2500-800Especially for use with aluminium-copper and berryllium-copper.Paste0.15-1.2
S 45550-750Flux without boron. Used in nuclear applications.Powder0.6
H 15600-900

For high temperature brazing and for the assembly of large pieces requiring prolonged heating.

Recommended for brazing alloys with a silver content less than 20%.

Powder0.1-0.6-5
FL 06500-700For delicate work using low melting point brazing alloys.Liquid1 Litre
AL 5530-600For the assembly of heat diffusing aluminium bases to stainless steel saucepans.Power5-20
AL 52530-600Can be used in paste form AL52Powder20

With the exception of the assembly of components in copper with copper-phosphorus alloys, all other brazing operations require the use of a brazing alloy in conjunction with a suitable flux. The purpose of the flux is:

  • to attack the surface of the metals to be joined, reduce any oxides on the surface and unable the brazing alloy to wet the surface,
  • to protect both the brazing alloy and the surfaces to be joined from oxidation during the brazing process.

The active range of flux must extend over the melting range of the brazing alloy chosen. The choice of the flux will depend also upon the metals to be joined. Fluxes are corrosive and strict attention must be paid to health and safety requirements.