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Company Information of Products
Copper, Copper-Nickel Alloy for Sea-Water Corrosion Resistant System.
 
Product
- Pipe
- Plate
- Fittings
- Flanges
Material
- Copper
- Brass
- Bronze etc.
- Copper Nickel 90/10
- Copper Nickel 70/30
Standards
- ASTM
- BS
- MIL-STANDARD
- DIN
- EEMUA
- JIS etc.
Application of Product
- Shipbuilding
- Offshore
- Desalinization
- Special Marine Vessels
- Various Navy projects
 
 
Product Range
- Nominal sizes from 1/2" pipe O.D to 24" pipe O.D
- Other sizes are also produces, availability on application.
 
 
Comparison table of International Standard  for Cu-Ni 90/10
Chemical
Composition
EEMUA 144
UNS 7060X
BS 2871
CN 102
BS EN
12449
CW352H
ASTM
B466
C70600
DIN
17664
2.0872
DIN
86019
2.1972
NES
779
MIL-T-
16420K
C70600
JIS H 3300
C7060
Ni%
10.0-11.0
10.0-11.0
9.0-11.0
9.0-11.0
9.0-11.0
9.0-11.0
10.0-11.0
9.0-11.0
9.0-11.0
Fe%
1.5-2.0
1.0-2.0
1.0-2.0
1.0-1.8
1.0-2.0
1.5-1.8
1.0-2.0
1.0-1.8
1.0-1.8
Mn%
0.5-1.0
0.5-1.0
0.5-1.0
Max.1.0
0.5-1.0
0.5-1.0
0.5-1.0
Max.1.0
0.2-1.0
Zn%
Max.0.20
-
Max.0.50
Max.0.50
Max.0.5
Max.0.15
-
Max.0.50
Max.0.50
Pb%
Max.0.01
Max.0.01
Max.0.02
Max.0.02
Max.0.03
Max.0.03
Max.0.01
Max.0.02
Max.0.05
P%
Max.0.02
-
Max.0.02
Max.0.02
Max.0.02
Max.0.02
-
Max.0.02
-
S%
Max.0.02
Max.0.05
Max.0.05
Max.0.02
Max.0.02
Max. 0.015
Max.0.05
Max.0.02
-
C%
Max.0.05
Max.0.05
Max.0.05
Max.0.05
Max.0.05
Max.0.05
Max.0.05
Max.0.05
-
Sn%
-
-
Max.0.03
-
-
-
-
-
-
Zr%
-
-
-
-
-
Max. 0.03
-
-
-
Other imp.
Max.0.30
Max.0.30
-
-
Max.0.30
Max.0.30
Max.0.30
-
-
Cu %
Balance
Balance
Balance
Balance
Balance
Balance
Balance
Min.86.5
Cu+Ni+Fe+Mn Min. 99.5
 
Mechanical
properties
EEMUA 144
UNS 7060X
BS 2871
CN 102
BS EN
12449
CW352H
ASTM
B466
C70600
DIN
17664
2.0872
DIN
86019
2.1972
NES
779
MIL-T-
16420K
C70600
JIS H 3300
C7060
Tensile strength
300~
380N/mmę¸
300~
380N/mmę¸
MIN.290N/
mmę¸
MIN.260N/
mmę¸
MIN.280N/
mmę¸
MIN 38
Ib/inę¸
MIN.275N/
mmę¸
Yield strength
Min.
105N/mmę¸
-
-
MIN.
90N/mmę¸
**MIN.
110N/mmę¸
***MIN 13
Ib/inę¸
Elongation
Min.30%
MIN.30%
MIN.30%
-
MIN.30%
MIN.30%
MIN.30%
Hardness
*HV5
/MAX.120
HV5
/MAX.100
HV5
/75~100
HR
30T/MAX.
45
HV/
MAX90
-
-
* only seam-welded    **Only pt.1 (bar-stock)    ***Up to 4 1/2" : MIN 15 lb/inę¸
 
Welding Instruction  
Welding equipment should be required direct current.
 
Filler metal
The filler wire or rod has a grade identical to that of the parent metal. however, the filler wire or rod used for weld Cu-Ni 90/10 with Cu-Ni 70/30 bare metal available.
Flux coated electrodes can be used for wall thickness of 6mm above.
Cu-Ni 70/30 can be welded with Cu-Ni 70/30 filler metal.
It is important to degrease of parent metal filler metal.
Table 1. is showing national specification of the filler metal.
 
 
National
Cu-Ni 90/10
Cu-Ni 70/30
Flux coated electrode
Filler wire
Flux coated electrode
Filler wire
Germany
DIN 1733
S-CuNi10Fe
No. 2.0873
DIN 1733
S-CuNi10Fe
No. 2.0873
DIN 1733
S-CuNi30Fe
No. 2.0873
DIN 1733
S-CuNi30Fe
No. 2.0873
British
BS 2901
Part.3 Type C16
90/10 Cu-Ni-Fe-Ti
BS 2901
Part.3 Type C18
90/10 Cu-Ni-Fe-Ti
USA
AWS A 5.6 E CuNi
AWS A 5.7 ER CuNi
 
Edge preparation for butt welded joints
Joint Preparation on pipes ( End beveling to welding) can be used to all types.
Generally, edge preparation is the same fig.1.
 
  Welding operation can be carried out under conditions if jointing parts are perfectly clean and free greas, oxidation and dust.
If possible, welding is carried out in down-hand position with "1G"

Internal Protection
To avoid oxidation and fluxing on the inside of the joint, it is required to ensure internal protection by shielding gas (pure 99.9% argon) which is used as the back purging gas (pure 99.9% argon or nitrogen)

Tacking
The parts to be joined together are edge to edge and tacked. The tack weld should be kept to a minimum and as short as possible and should be deposited, cleaned thoroughly before welding commences. Positional welding is facilitied by making the root run by the TIG process.
 
Then, travel is reversed and welding continued with a weave motion.

The diameter of the electrode is individual on the welding current. The following table showing the typical data
 
Metal thickness
(mm)
Diameter of electrode
(mm)
Diameter of filler wire
(mm)
Welding current
(Ampere)
Argon flow
(L/mm)
Number of pass
2
1.6
2
100 ~ 120
7
1
3
2.4
2
140 ~ 160
8
2
4
3.2
3.2 ~ 5.0
180 ~ 200
8
2
6
3.2
3.2 ~ 5.0
220 ~ 260
8
3
8
3.2
3.2 ~ 5.0
220 ~ 260
8
4
10
3.2
3.2 ~ 5.0
220 ~ 260
8
5
Table 2. Operating data for the TIG welding
 
The number of pass is necessary to follow table. 2 in order to avoid local overheating which risks causing collapse of the bead.
** Detailled welding procedure specfication is available upon request.
 
 
 
 
  #584-9 Hwajeon-dong, Gangseo-gu, BUSAN, KOREA  Tel :  +82-51-266-4101  Fax : +82-51-266-4104  E-mail : sales@bomyungmetal.com Copyright(c) bomyung co., Ltd. All rights reserved.