DESCRIPTION
V-CuAlA2 is a special aluminum bronze welding electrode which has excellent usability. Its weld metal consists of single phase of a, and shows good toughness, abrasion resistibility. It has also good corrosion resistibility against sea water, and sulphuric acid. Therefore, it is suitable for repairing of screws for ship, and build-up welding of heat exchangers, gears and bearings which are subjected to these injurious environments. It is the most versatile welding electrode in this family of alloys. It contains additive to inhibit inter-granular stress corrosion cracking. It can join many ferrous, non ferrous and combinations of dissimilar metals. These includes cast iron, high and low carbon steels, copper, bronzes, and copper nickel alloys.
APPLICATIONS
Repairing and joining of screws for ship, heat exchangers for oil refinery. Build-up repairing of gears and bearings. Also suitable for surfacing of various mild steel parts. Joining and fabricating copper alloys, overlaying for resist over to corrosion and erosion and general maintenance and repair welding.
INSTRUCTION FOR WELDING
(1) Keep the welding current as low as possible in the case of first-layer welding.
(2) Preheating is not necessary in the case of lining of mild steels. The preheating temperatures varies in accordance with quality of base metal, a preheating temperature of 150 - 250ºC is required in general.
(3) Preheating at 250ºC-300ºC is necessary in the case of welding brass.
(4) The interlayer temperatures varies in accordance with the preheat temperatures.
(5) Keep the arc length as short as possible and don’t use too much weaving.
TYPICAL ANALYSIS OF ALL WELD DEPOSIT:
Cu |
Al |
Fe |
Si |
Sn |
P |
Others inc. Tin |
|
|
Bal. |
8.50-11.0 |
0.50-5.0 |
<1.5 |
- |
- |
<0.50 |
|
|
TYPICAL ALL WELD MECHANICAL PROPERTIES:
Yield Point
N/mm2 (Ksi) |
Tensile Strength
N/mm2 (Ksi) |
Elongation
% |
HARDNESS
HB |
240 (35) |
530 (77) |
27 |
110-120 |
RECCOMMENDED CURRENTS: Ampere (DC+)
Size |
Dia |
3.2 |
4.0 |
5.0 |
|
(mm) |
Length |
350 |
350 |
350 |
|
Current
Range |
Flat |
70-110 |
110-150 |
140-180 |
|
|
|
WELDING POSITIONS:
FLAT, FILLET, VERTICAL UP, HORIZONTAL, OVERHEAD
EXPORT Packing: 5Kg plastic container, then 4 5kg containers in master carton box
LOCAL Packing: 5Kg paper box in shrink wrapped plastic
Other special packaging can be accommodated as per request. |
