Applications
Welding of 0.5% Cr-0.5% Mo steel used for high temperature and high pressure boilers, chemical and oil refining industries.
Characteristics
N-8018-B1 is a low hydrogen type electrode for all-position welding, which provides the weld metal 0.5% Cr-0.5% Mo.
The crack is resistibility of the weld metal is excellent.
Notes on usage
(1) Dry the electrodes at 325-375ºC for about one hour before use.
(2) Preheat at 150-250ºC and postheat at 620-680ºC.
(3) Adopt back step method or strike the arc on a small steel plate prepared for this particular purpose to prevent blowholes at the arc starting.
Typical Chemical Composition of Weld Metal (%):
C |
Si |
Mn |
Cr |
Mo |
0.07 |
0.51 |
0.81 |
0.51 |
0.49 |
Typical Mechanical Properties of Weld Metal:
Yield Point
N/mm2 (Kgf/mm2) |
Tensile Strength
N/mm2 (Ksi) |
Elongation
(%) |
PWHT |
590 (86) |
650 (94) |
31 |
690 degrees C x 2 hr |
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 |
60-90 |
90-130 |
140-180 |
140-180 |
V & OH |
60-90 |
80-110 |
110-150 |
110-150 |
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. |
