FCW S 309L-O
Gas-free cored wire 309L
Product description
– Stainless steel flux-cored wire for gas-shielded arc welding
– 24% chromium – 13% nickel – low-carbon deposit
– Attractive, spatter-free weldability, outstanding arc stability and pay-off quality
– Automatic slag removal, excellent radiographic quality
– High productivity for welding in horizontal position
– Very high resistance to moisture pick-up
– Can be welded in position
– Can be welded under mixed gas or CO2
Product application instructions
APPLICATIONS
– Joining of steels with alloying element contents between 22 – 26% Cr and 11 – 14% Ni, as well as ferritic stainless steels
– Welding 18Cr – 8Ni steels in corrosive environments requiring alloyed deposited metal
– Joining stainless steels with non- or low-alloy steels
– Reconstitution or undercoating before plating or reloading
– Repair work on steels with limited weldability
Examples:
Heterogeneous joints between stainless steels type 304, 304L, 316, 316L, 318, 316Ti, 321, 410, 1.4713, 1.4724, 1.4742, 3Cr12 and non/low-alloy CMn steels.
Operating temperatures up to 400°C
Welding positions: EN ISO 6947: PA, PB, ASME IX: 1G, 1F, 2F.
Wear resistance
Metal-Metal
Corrosion
Temperature
Impact
Abrasion
Classification
| AWS A 5.22 | EN ISO 17633-A | ASME IX Qualification |
|---|---|---|
| E309LT0-4 - E309LT0-1 | T 23 12 L R M 3 - T 23 12 L R C 3 | QW432 F-N° 6 / QW442 A-N° 8 |
Chemical analysis (%)
| C | Mn | If | Cr | Ni |
|---|---|---|---|---|
| 0.03 | 1.4 | 0.7 | 23.5 | 13.0 |
Mechanical characteristics
| Rm (MPa) | Rp0.2 (MPa) | A5 (%) | KCV |
|---|---|---|---|
| 580 | 460 | 35 | -60°C: 35 J |
Why choose this cored wire?
- Ideal for hardfacing on carbon and low-alloy steels
309L contains 24% chromium and 13% nickel, making it a filler metal highly tolerant to metallurgical differences. It is often used for :
-buffering before applying a final coat (e.g. 316L, 308L),
-weld stainless steel to carbon steel (dissimilar applications).
- Open arc technology = no gas required
The big advantage of open arc cored wire is that it needs no external protective gas.
- Very good resistance to cracking
Thanks to its nickel content, 309L has a very stable austenitic structure, which limits cracking even on sensitive or overheated materials.
- Corrosion and heat resistance
This wire is stainless, and its low carbon content (“L” for Low Carbon) reduces the risk of intergranular corrosion. It can be used at temperatures up to 300-350°C without concern.
- Easy to use and efficient
Open arc cored wires are popular for :
-high productivity,
-the ability to weld in several positions,
