Basic type coated electrode designed to weld 9 CrMo steels with the addition of niobium, vanadium and nitrogen to give improved creep properties. Widely used on pressure vales, steam piping and turbine castings.
Features and Applications
High- alloyed low-hydrogen electrode with basic-type coating
Resistance to heat and creep, high resistance to creeping and high toughness values under long-term stress
Weld metal’s resistance to high temperatures up to 620°C
Pre-heating and inter-pass welding temperature: 200°C - 315°C
Requirement of re-drying for min. 2 hours at the temperatures between 300°C and 350°C
Vacuumed packed electrodes
Typical Base Material Grades
X10CrMoVNb 9-1, A213 Gr. T91, A 335 Gr. P91 (T91), A 139Gr.T91, % 9-12 Cr type martensitic stainless steels.
| Standards |
Current Type |
EN ISO 3580-A - E CrMo91 B 42 H5
|
D.C.(+) / D.C.(-) for root pass |
AWS A5.5 - E9018-B91 H4
|
|
| Chemical Composition of Weld Metal % (Typical) |
| C |
Si |
Mn |
Cr |
Mo |
Ni |
V |
Nb |
N |
| 0.09 |
0.2 |
0.5 |
9.0
|
1.0 |
0.6 |
0.2 |
0.04 |
+ |
| Mechanical Properties |
Yield Strength
(N/mm2) |
Tensile Strength
(N/mm2) |
Impact Strength
(ISO-V/+20ºC)
|
Elongation
(Lo=5do)(%) |
Heat Treatment |
min. 530
|
min 620
|
min. 47 J |
min. 17
|
745-775ºC/2hr
300ºC (air) |
Welding Positions
| Operating Data |
| Diameter x Length (mm) |
Welding Current (A) |
Package
Weight (Kg) |
Carton
Weight (Kg) |
|
2.50 x 350
3.20 x 350
4.00 x 350
|
80 - 110
110 - 140
140 - 190
|
2
2
2
|
12
12
12
|
Liability: Whilst all reasonable efforts have been made to ensure the accuracy of the information contained. This information is subject to change without notice and can be only considered as suitable for general guidance.
