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- E BK-8018 B2
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Welding Electrode E BK 8018 –B2
E BK 8018 –B2, Chromium-molybdenum alloyed low hydrogen welding electrode for welding creep-resistant steels (1Cr-0.5Mo). low-hydrogen electrodes produce weld metal that nominally contains 1.25% Cr and 0.5% Mo. They are designed to produce weld metal for high-temperature service and for matching the properties of some chromium-molybdenum base materials such as ASTM A387 Grade 11. Since all chromium-molybdenum electrodes produce weld metal that will harden in still air, both preheat and PWHT are required for most applications. E8018-B2 has quick and easy slag removal, which reduces clean-up time. The low spatter level improves weld bead appearance and lends itself to higher depositions. Field of application up to operational temperatures of 550 °C.
Applications
Steam pipes, super heaters, petroleum cracking plants, power plants… Welding of 13CrMo4 4, GS-17CrMo5 5.
Classification
AWS
A5.5 : E 8018-B2
EN ISO
EN ISO 3580-A : E CrMo1 B 3 2
DIN
-----Typical Weld Metal Analysis %
| C | Cu | Cr | Mn | Mo | Si | P | S |
| 0.07 | 1.00 | 1.20 | 0.65 | 0.50 | 0.55 | <0.02 | <0.02 |
Mechanical Properties (As Welded)
| Yield Strength RP0,2
(N/mm2) |
Tensile Strength Rm
(N/mm2) |
A
(%) |
ImpactEnergy +20°C -196°C |
| 410 MPa |
510 MPa |
>20% |
>95 >70 |
General Information
Welding process
Covered Electrode (SMAW)
Alloy Type
Creep Resistant Steel 13crmo4 4
Re-drying Temperature
150°C/2hours
Beads
Use stringer beads (do not weave).
Cleaning
Remove all cracks and fatigued metal by grinding.
Welding Parameters
| Diameter & Length (mm) |
Current (A) |
| 2.5x300 |
70~80 |
| 3.2x300 |
90~120 |
| 4.0x350 |
120~150 |