Applications
Welding of 5% Mo steels such as ASTM 387 Gr. 5 used in oil refining chemical industries and electric power plant.
Welding of quenched and tempered high tensile strength steel for air craft parts.
Characteristics
N-502 is a low hydrogen type electrode for all-position welding, which provides the weld metal containing 5% Cr-0.5% Mo.
Notes on usage
(1) Dry the electrodes at 325-375°C for about one hour before use.
(2) Preheat at 250-350°C and post heat at 730-760°C.
Typical Chemical Composition of Weld Metal (%):
C |
Si |
Mn |
Cr |
Mo |
0.06 |
0.62 |
0.43 |
4.95 |
0.51 |
Typical Mechanical Properties of Weld Metal:
Yield Point
N/mm2 (Kgf/mm2) |
Tensile Strength
N/mm2 (Ksi) |
Elongation
(%) |
PWHT |
400 (58) |
520 (75) |
32 |
750 deg C x 8 hrs |
Size and Recommended Current Range (AC/DC+):
Diameter (mm) |
2.5 |
3.2 |
4.0 |
5.0 |
Length (mm) |
350 |
350 |
400 |
400 |
Ampere |
Flat |
50-75 |
70-110 |
110-155 |
155-200 |
V & OH |
30-70 |
55-105 |
90-140 |
|
Welding Positions:
ALL POSITIONS
Packing:
20 Kg corrugated box, with 4 units of 5 Kg shrinked plastic wrapped paper boxes inside.
Special requests on packing are accepted. |
