HFM 21 S
Basic electrode for creep-resistant steels
Product description
Low-hydrogen chromium-molybdenum basic electrode for welding creep-resistant steels up to 600°C (including cast steels 2%Cr – 1%Mo). Good resistance to hydrogen (H2S, etc.).
Applications: superheaters, valve bodies, tubes, boilers, hydrocrackers.
Product application instructions
| Steels and tubes for boilers and pressure vessels:
NF A 36-206 : 15CD4-05 – 10CD9-10 DIN 17155 and 17245 : 10 Cr Mo 9.10 – 10 Cr Si Mo V7 : 24 CrMo V55 – 12 Cr Mo 9.10 GS 12 Cr MO 9.10… BS : 1501 Gr 622 to 1504 Gr 622, BS 359 Gr 622/640 1503 Gr 660, 1504Gr 660 ASTM: A 387 GrD – A 335 GrP 22 – A 213 GrT 22, T36 |
| Vallourec grade: Chromesco 3 |
Classification
| NFA 81-345 | AWS A 5.5 | BS 2493 | EN ISO 3580 | DIN 8575 |
|---|---|---|---|---|
| E C2 Cr Mo B 120 20 BH | E 9018-B3 | Cr Mo BH | E 2 Cr Mo B 20 | E Cr Mo 2 B 20 + |
Chemical analysis (%)
| C | Mn | If | S | P | Cr | Mo |
|---|---|---|---|---|---|---|
| 0.07 | 0.8 | 0.4 | <0.025 | <0.025 | 2.25 | 1.0 |
Mechanical characteristics
| Rm (MPa) | Rp0.2 (MPa) | A5 (%) | Av - ISO - V |
|---|---|---|---|
| >570 | >450 | >17 | 20°C >100 |
Why choose this basic electrode?
Vacuum-packed 5 or 6Kg electrode for welding highly stressed steel assemblies (carbon and carbon manganese) (tensile strength up to 510 MPa).
It features excellent mechanical properties, particularly at low temperatures.
