ERNiFe-CI is used for welding of cast iron. This filler metal is extensively employed to overlay the cast iron rolls. It is also used to repair the castings. A preheat and interpass temperature of 175ºC (350ºF) minimum is recommended during welding, without which the weld and heat affected zones could develop cracks.
Ni 55 (AWS class not specified) is a nominally 55% Nickel wire. The lower Nickel content makes this alloy more economical than Ni 99. Weld deposits are usually machine-able, but under conditions of high admixture, the welds can become hard and difficult to machine. It is often used for repairing castings with heavy or thick sections. As compared to Ni 99, welds made with 55 Ni are stronger and more ductile, and more tolerant of phosphorous in the casting. It also has a lower coefficient of expansion than Ni 99, resulting in fewer fusion line cracks.
CHEMICAL COMPOSITION:
|
NickelNi45.0-60.0% |
IronFebalance |
SiliconSimax 4.0% |
ManganeseMn2.5% |
CopperCu2.5% |
CarbonCmax 2.0% |
AluminumAlmax 1.0% |
MECHANICAL PROPERTIES:
| Tensile strength Rm (MPa) | Yield strength Rp0.2 (MPa) | Elongation A % |
| min. 393-579 (57-84 psi) | 296-434 (40-64 psi) | 6-13 |
PRODUCT FORMS:
|
Product |
Diameter, mm |
Length, mm |
|
Wire for MIG/GMAW welding |
0.8, 1.0, 1.2, 1.6, 2.0, 2.4, 2.5, 3.2 |
— |
|
Rods for TIG/GTAW welding |
2.0, 2.5, 3.2, 4.0, 5.0 |
915 – 1000 |
|
Wire for SAW welding |
2.0, 2.4, 3.2, 4.0, 5.0 |
— |
|
Electrode core wire |
2.0, 2.5, 3.20, 3.25, 4.0, 5.0 |
250, 300, 350, 400, 450, 500 |
Binary Nickel-Iron (Ni-Fe) and Ni based complex welding alloys are supplied in welding rod and wires in standard length or length up to the consumers' request. For normal service conditions, the chemical compositions are available in various Ni contents according to the most of American and European standards.
