Mild & carbon steels
FERVEO STL BF31 FCW
flux-cored wire (FCW)Catalogue only
AWS class
E70T15-M21A4-CS1-H4 E70T5
EN ISO class
T46 4 B M 3 H5 / T42 4 B C 3 H5
Tensile strength (Rm)
530–680 MPa
Recovery
88 %
Classification
| AWS class | E70T15-M21A4-CS1-H4 E70T5 |
|---|---|
| EN ISO class | T46 4 B M 3 H5 / T42 4 B C 3 H5 |
| Other standards | ISO 20172: Gruppe 1.1 · TÜV Kennblatt 1000: Gruppe 1 |
Purpose
- Basic-type flux-cored wire for UNI 430/510 steel and fine-grained equivalents (AWS E70T15-M21A4-CS1-H4/E70T5, EN ISO T46 4 B M3 H5/T42 4 B C3 H5).
Why it works
The flux's basic character gives an excellent, spatter-free bead appearance, with easily removable slag and good mechanical performance — a dual classification lets it run under Ar-CO2 mix (M21) or pure CO2.
Fields of application
- UNI 430, UNI 510 steel and fine-grained equivalents, in flat and horizontal-fillet position.
Chemical composition
| Element | Typical, % |
|---|---|
| C | 0.06 |
| Mn | 1.55 |
| Si | 0.5 |
Mechanical properties
| Tensile strength (Rm) | 530–680 MPa |
|---|---|
| Yield strength (Rp0.2) | 460 MPa |
| Elongation (A5) | 20 % |
Process
| Polarity | DC+ |
|---|---|
| Shielding gas | M2,M3,C |
| Positions | PAflatPBhorizontal-vertical |
| Requires shielding gas | Requires shielding gas |
| Recovery | 88 % |
Sizes and part numbers
| Ø | Request |
|---|---|
| 1.2 mm | |
| 1.6 mm | |
| 2.4 mm | |
| 3.2 mm |
Supply programme
spools D100 / D200 / K200 / K300 · Ø 1.2 / 1.6 mm
Base metals
St 37.0-St 52.0HI-HII17Mn4StE 255-StE 460
Advantages
- Excellent, spatter-free bead appearance, easily removable slag.
- Dual classification — shieldable with Ar-CO2 mix or pure CO2, depending on gas available in the shop.
Limitations
- Restricted to flat and horizontal-fillet position — for all positions, see FERVEO STL RF14 FCW.