LH 81A1S
High temperature basic coated electrode
Description & applications
Low hydrogen basic coated electrode with Mo for welding steels resistant to temperature up to 500°C. Good resistance to Hydrogen attacks (chemical installations).
Piping, boilers... soft fusion, easy slag removal and nice aspect of the metal deposit.
Steels and pipes for boilers and pressure vessels :
NF A 36-206 : 15D3 - 18MD4 - 05
DIN 17155 - 17245 : HI - HIII - GS C 25 - 17 Mn4
17175 - 17102 : 19 Mn5 - 15Mo3 - GS22Mo4
St 35.8 - St 45.8 - 17Mn4 - 19Mn5
15Mo3 - StE 255 - StE 420
BS 1504 Gr 245 - BS 3100 Gr B1 - BS 3606 Gr 243, 245
ASTM A 335 Gr P1 - A352 GrLC1 - A204 GrA and B - A 155 Gr CM 65/70
Classification
| NFA 81-345 | AWS A 5.5 | BS 2496 | EN ISO 3580 | DIN 8575 |
|---|---|---|---|---|
| E Mo B 120 20 BH | E 7018-A1 | Mo BH | E Mo B 20 | E Mo B 20 + |
Typical weld metal composition (%)
| C | Si | Mn | Mo | P | S |
|---|---|---|---|---|---|
| <0.1 | 0.4 | 0.8 | 0.5 | <0.025 | <0.025 |
All weld metal mechanical properties
| Rm (MPa) | Rp0.2 (MPa) | A5 (%) | Av - ISO - V |
|---|---|---|---|
| >550 | >450 | >22 | + 20°C > 100 |
Packaging data
| Dimension | 2.5x350 | 3.2x350 | 4.0x450 | 5.0x450 |
|---|---|---|---|---|
| Electr. / packet | 244 | 143 | 94 | 64 |
| Electr. / carton | 976 | 572 | 376 | 256 |
| Kg 1000 electr. | 20.5 | 35 | 69 | 102 |
| Packets / carton | 4 | 4 | 4 | 4 |
| Kg / packet | 5 | 5 | 6.5 | 6.5 |
| Kg / carton | 20 | 20 | 26 | 26 |
Amperes
| A | 80 | 115 | 150 | 190 |
|---|
