Copper Based Brazing Alloys

KUMUD COPPER
- ZINK GRADE

As per I.S. 1278                        CHEMICAL COMPOSITION %

MELTING RANGE

Classifi-
cation


Cop-
per


Tin



Nick-
el


Iron



Maga-
nese


Anti-
mony


Phos-
phorus


Lead



Alu-
mi-
nium

Silli-
con


Bis-
muth


Ars-
enic


Zinc



Other
Elem-
ents
Each Mex
Other
Elem-
ents
Total
Mex
Sol-
idus
ºC

Liqu
-idus 
ºC
KUMUD
C-Z-A 
BA CU 1 99.90
Min
- - - - - 0.05 0.0005 0.01 - 0.0025 - - - 0.10 1085 1085
KUMUD
C-Z-B
BA CU Zn 1 79.0-
81.0
0.10 - 0.15 - 0.05 - 0.50 - - 0.05 - Rem-
ainder
- 0.10 980 990
KUMUD
C-Z-C
BA CU Zn 2 59.0-
61.0
0.10 - 0.15 - 0.05 - 0.50 - - 0.05 0.05 do - 0.10 885 890
KUMUD
C-Z-D
BA CU Zn 3 59.0-
61.0
0.8-
1.2
- 0.15 - 0.05 - 0.50 - - 0.05 0.05 do - 0.10 880 890
KUMUD
C-Z-E
BA CU Zn 4 57.0-
63.0
0.50 - 0.1-
0.5
0.05-
0.25
0.05 - 0.03 0.03 0.20-
0.30
0.05 0.05 do - 0.30 870 900
KUMUD
C-Z-F
BA CU Zn 5 53.0-
55.0
0.05 - 0.15 - 0.05 - 0.30 - - 0.05 0.05 do - 0.10 870 880
KUMUD
C-Z-G
BA CU Zn 6 53.0-
55.0
0.8-
1.2
- 0.15 - 0.05 - 0.30 - - 0.05 0.05 do - 0.10 860 870
KUMUD
C-Z-H
BA CU Zn 7 49.0-
51.0
0.05 - 0.15 - 0.05 - 0.30 - - 0.05 0.05 do - 0.10 860 870
KUMUD
C-Z-I
BA CU Zn 8 45.0-
53.0
0.5 8.0-
11.0
0.5 - - 0.25 0.03 0.03 0.20-
0.50
- - do - 0.10 920 980
**Packing can be done on customized basis also