DAIKOFCW 309LMo

FCAW
  • AUSTENITIC STAINLESS STEELS
309LMo

Description

Rutile flux cored wire for flat and horizontal position
Austenitic rutile flux cored wire for welding and cladding in flat and horizontal position. The easy handling and the high deposition rate result in high productivity, excellent welding performance and very low spatter formation. The self-releasing slag makes cleaning and pickling easier providing together with increased travel speeds noticeable savings in time and costs. The wire shows good wetting behaviour and a finely rippled surface pattern. These consumables are mainly used under high dilution conditions, particularly dissimilar welds between stainless and CMn steels.
Specifications
ISO 17633-A
T 23 12 2 L R C1/M21 3
AWS A5.22
E309LMoT0-1/4
Certifications
CE, TUV
Shielding
M21, C1
Positions
PA, PB, PC
Current
DC+
Packaging Type
BS300 spool
Asme qualifications
F-No (QW432)
6
A-No (QW442)
8

Ferrite

10-30 FN

Pren

31.59

Hardness

85HRB
Chem. Comp. %
DEFAULT
C
0.02
Mn
1.4
Ni
12.6
Cr
24
P
0.02
S
0.01
Mo
2.3
Si
0.7
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
700
Yield strength Rp0.2 MPa
350
540
Elongation A (L0=5d0) %
25
28
Impact Charpy ISO-V
-
40J @ -20°C
Impact Charpy ISO-V
-
-
Welding Parameters
1.2 mm
1.6 mm
Ampere
120A - 280A
200A - 350A
Voltage
22V - 30V
26V - 30V
Packaging
Ø 1,2÷1,6mm
Ø 1,2÷1,6mm
Packaging Type
BS300 spool
BS300 spool
Description

Application

Typically utilized for buffer layers and overlays on C-Mn, mild steel, or low alloy steels, and for joining 316L clad plates. Subsequent layers are added with an appropriate filler to align with the cladding, such as 316L or 318. Additionally, it functions as a buffer layer before engaging in hardsurfacing with chromium carbide types. Its ability to tolerate dilution is harnessed when joining stainless types 410, 304L, 321, and 316L to mild and low alloy steels, including stiffeners, brackets, and other attachments. Service temperatures exceeding 300°C are generally avoided. For some applications, a more economical alternative like 309L or 307 may be suitable. The high level of alloying and ferrite content allows dilution from a wide range of alloyed and hardenable steels, ensuring crack-free welds. Preheat and interpass temperatures are influenced by the base material hardenability, with no preheat typically required for mild steels, and it can extend up to 250°C for hardenable steels.

Alloy Type

23%Cr-13%Ni-2.5%Mo (309Mo) austenitic stainless steel.

Microstructure

Austenite with ferrite normally in the range 10-30FN.

Materials

Mainly used under high dilution conditions, particularly dissimilar welds between stainless and CMn steels. There are no comparable base materials.

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