Copper-base filler metal & Application

Cu- P filler metal

According to Cu-P Diagram, copper can evidently lower the melting point of the filler metal. When the composition of P is 8.4%, the eutectic structure with low melting point  714 ((Cu)+Cu3P) will be produced.

In order to lower the melting point and improve the toughness, Ag could be the good candidate as the additional element, since  the low melting eutectic phase (ωAg=17.9%ω(Cu)=30.4% and ω(Cu3P)=51.7%ω(P)=7.3%),whose eutectic point is 646 will be formed.

Phos-copper filler metal has several advantages, such as good fluency, low cost, and perfect performances. In addition, due to the self-flux character of Cu, this kind of filler metal could be used in resistance brazing, gas flame brazing, high frequency induction brazing and furnace brazing, etc. The joint strength is higher and the conductivity is better. However, flux is necessary while brazing copper or copper alloys. Phos-Copper-Silver brazing alloys with low melting point have good wettabilty, higher strength and toughness.  The ramp rate should be as quick as possible while brazing. The joint is to be bright grey and will return to the original color of copper while dipped into 10% sulphuric solution.

Cu – P filler metal

ALLOY
国    标
或相当的 
外国牌号

Chemical Compositionimpurity≤0.15%

Melting Range

Application

Ag

P

Cu

Solidus/

Liquidus

/

AWY-7P
BCu93P
BCuP-2
L-CuP7

--

6.5-7.5

little

1310/710

1454/790

For brazing copper-copper and copper-brass alloy

AWY-8P

BCu92P
TC-310D

--

7.5-8.5

little

1310/710

1364/740

Awy-7PSn

BCu86P
TC-302
Degussa86

Sn()

6.5-7.5

6.5-7.5

little

1184/640

1256/680

For brazing copper parts in airconditions, freezers, refrigerators and motors. The brazing performance is excellent.

AWY-2B
BCu91PAg
BCuP-6
L-Ag2P

1.8-2.2

6.8-7.5

little

1190/643

1300/705

AWY-5B
BCu88 PAg
BCuP-7

4.6-5.2

6.5-7.0

little

1190/643

1420/771

AWY-5B

BCu88 PAg
BCuP-3
L-Ag5P

4.8-5.2

5.8-6.2

little

1190/643

1495/813

AWY-15B
BCu80 PAg
BCuP-5
L-Ag15P

14.5-15.5

4.8-5.2

little

1190/643

1476/802

AWY25B
BCu7 PAg
ИСР25Ф

24.5-25.5

4.8-5.3

little

1190/643

1337/725

For brazing copper and copper alloys in motors and spectacles.

AWY-18B

BCu7PAg
HgHSil-Fos18

17.8-18.2

7.0-7.5

little

1190/643

1295/702

Copper-Zinic Brazing Alloys

  Copper-Zinic Brazing Alloys are suitable for gas-flame brazing, high temperature brazing, salt bath dip brazing between copper and copper alloys, nickel, cast iron and hard alloys. While in oxyacetylene brazing, it is possible to prevent Zinc evaporation by oxidization flame heating. . The optimum joint gap should be 0.025-0.01mm. And flux is also necessary.

ALLOY

   
和相当的
外国牌号

Chemical Compositionimpurity≤0.15%

Melting Range

Application

Cu

Sn

Zn

other

Solidus
/

Liquidus
/

S221

BCu60ZnSn
RBCuZn-A

59-61

0.8-1.2

38-40

Si: 0.3

1634/890

1661/905

For copper-copper alloy, steels, stainless steel, cast steel, hard steels.

S222

BCu58ZnFe
RBCuZn-C

57-59

0.8-1.0

40-42

Si: 0.1
Fe: 0.8

1589/865

1634/890

S225

BCu48ZnNi
RBCuZnNi-D

47-49

0

41-43

Si: 0.2
Ni:10

1690/921

1715/935

Copper and copper-base filler metals for hard metals brazing

牌号

Composition ω%

Melting range/

Brazing temperature

TB/

Features&Application

Cu

Zn

Ni

Mn

Si

TS

TL

H62

62+1.5

28+1.5

  -

  -

  -

900

905

910~950

Low brazing temperature, jointing strength higher than copper brazing; for brazing mid-loading work.

Bcu58ZnMn

58

38

  -

4

  -

880

909

940~960

High joint strength, for brazing large loading work at 500 below

Cu54ZnMnSi

54.8

20

  -

25  -

0.2

 -

 -

  -

Bcu48ZnNi-R

48+2

little

10+1

 -

0.5+0.1

921

935

938~982

for brazing large loading work at above 500

Cu85Mn

85

  -

  -

15

  -

920

960

960~1100

For high temperature

Available Form:Wire with or without spool,Rod&bar,flat,square,ring,strip etc.

 

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