Mild & carbon steels
FERVEO STL 420C2
covered electrode · stick electrodecellulosic coatingCatalogue only
AWS class
E 7010 - G
EN ISO class
E 42 2 Mo C 21
Tensile strength (Rm)
510–590 MPa
Classification
| AWS class | E 7010 - G |
|---|---|
| EN ISO class | E 42 2 Mo C 21 |
Purpose
- Molybdenum-alloyed cellulosic electrode, one strength step above FERVEO STL 380C3 (AWS E 7010-G, EN ISO E 42 2 Mo C 21).
Why it works
Mo alloying versus FERVEO STL 380C3 steps up mechanical strength while keeping the cellulosic's characteristic deep penetration, especially marked vertical-down.
Fields of application
- Root and filler passes on high-strength steel pipelines, closed vessels, boilers and steel structures.
Chemical composition
| Element | Typical, % |
|---|---|
| C | 0.1 |
| Mn | 0.4 |
| Mo | 0.3 |
| Si | 0.15 |
Mechanical properties
| Tensile strength (Rm) | 510–590 MPa |
|---|---|
| Yield strength (Rp0.2) | 420 MPa |
| Elongation (A5) | 22 % |
| Impact energy (KV) | 47 J (−20 °C) |
Process
| Polarity | DC+ |
|---|---|
| Positions | PAflatPBhorizontal-verticalPChorizontalPDhorizontal-overheadPEoverheadPFvertical-upPGvertical-down |
Sizes and part numbers
| Ø | Length | Current | Request |
|---|---|---|---|
| 2.5 mm | 350 mm | 40–80 A | |
| 3.2 mm | 350 mm | 65–125 A | |
| 4 mm | 350 mm | 90–175 A | |
| 5 mm | 350 mm | 140–220 A |
Cross-reference
| Replaces ESC 70G (Magmaweld) | Direct replacement |
Equivalence refers to the classification (AWS / EN ISO), not to product identity. In applications with a qualified procedure (WPS), validate the substitution before use.
Base metals
S235JRS275JRS235J2G3S275J2G3S355J2G3P235GHP265GHP355T1P235T2-P355T2L210-L415NBL290MB-L415MBS235JRS1-S235J4S2P235G1THP255G1THX42-X65 for root pass applications is using up to X70(L485MB)
Advantages
- One mechanical-strength step above FERVEO STL 380C3, with the same deep vertical-down penetration.
Limitations
- For even higher strength, see FERVEO STL 420C3 and FERVEO STL 460C3 Mo/1Ni.