Welding Instruction
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- Welding Equipment
BoMyung Metal Co., Ltd.
- Country / Year Established
- South Korea /
- Business type
- Others
- Verified Certificate
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12
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Product Information
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 facilities 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 |
The number of pass is necessary to follow table. 2 in order to avoid local overheating which risks causing collapse of the bead.
* Detailed welding procedure specification is available upon request.
B2B Trade
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- President
- HONG, SU SIK
- Address
- 584-9 Hwajeon-dong, Gangseo-gu, Busan, Korea
- Product Category
- Copper Alloy & Profiles,Other Copper
- No. of Total Employees
- 1-50
- Company introduction
-
BoMyung has been supplying various Copper & Copper-Alloys materials as a specialized manufacturer of PIPE, Fittings & Flanges to shipbuilding, fresh water facilities, plant, petrochemistry and various construction for over 18 years.
Since established in 1994, we have been doing our best for customer's satisfaction and value creation. Also, we have been improving our products for competitive price and high quality.We BoMyung is willing to take a role in domestic and international industrial development as well as in improving the quality of your life by improving the standard of living and protecting our natural environment.
We are always ready to serve you with all your Copper & Copper-Alloys metals needs. That can be of mutual benefit. It is sure BoMyung will be an ideal partner.
- Main Markets
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China
India
South Korea
U.S.A
- Main Product
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