DAIKOSTRIP 309LMo

ESW, SAW
  • AUSTENITIC STAINLESS STEELS
309LMo

Description

Cladding strip 309LMo alloy
Used for cladding applications to create corrosion resistance layer and buffer layer. It is suitable to produce a 316L composition in single pass. Typical applications include cladding of vessel for chemical and petrochemical industry, refinery, etc.
Specifications
ISO 14343-A
B 23 12 2 L / 21 13 3 L
AWS A5.9
(EQ309LMo)
Shielding
DAIKOFLUX 930, 937AS
Positions
PA
Current
DC+
Packaging Type
coils standard 30x0,5mm, 60x0,5mm, 90x0,5mm, weight 25-300kg, width and specific weights available on request
Asme qualifications
F-No (QW432)
6
A-No (QW442)
8

Ferrite

10-30 FN

Pren

30.07

Hardness

85HRB
Chem. Comp. %
0
1
C
0.03
0.015
Mn
1.3
1.8
Ni
12.5
13.7
Cr
18.5
20.5
P
-
0.02
S
-
0.01
Mo
2.6
2.9
Si
0.4
0.3
Cu
-
0.1
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
610
Yield strength Rp0.2 MPa
350
400
Elongation A (L0=5d0) %
25
35
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
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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