DAIKOWM 409Nb

GMAW
  • FERRITIC - MARTENSITIC STAINLESS STEEL
409Nb

Description

Nb stabilised solid ferritic stainless steel wire rod
These wire rods deposit a ferritic stainless weld metal which is used to weld Type 409 and 409Ti base materials. The addition of niobium improves corrosion resistance, increases strength at high temperature, promotes a ferritic micro-structure. Niobium is used instead of titanium because oxidation losses across the arc generally are lower. Not recommended for multi-pass applications. Consumables used for welding similar 12% Cr ferritic steels in application such as catalytic converters and mufflers.
Specifications
ISO 14343-B
SS409Nb
AWS A5.9
ER409Nb
Shielding
M12, M13
Positions
PA, PB, PC, PD, PE, PF, PG
Current
DC+
Packaging Type
Drums, B300, D200 and D100 spools.
Asme qualifications
F-No (QW432)
6
A-No (QW442)
6

Pren

12.49
Chem. Comp. %
DEFAULT
C
0.04
Mn
0.65
Ni
0.4
Cr
11.5
P
0.02
S
0.02
Mo
0.3
Si
0.5
Cu
0.16
Mechanical Properties
min
variant
Tensile strength Rm MPa
450
460
Yield strength Rp0.2 MPa
250
350
Elongation A (L0=5d0) %
15
26
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Welding Parameters
1 mm
1.2 mm
Ampere
160A - 220A
200A - 270A
Voltage
25V - 29V
26V - 30V
Packaging
Ø 0,8÷1,6mm
Ø 0,8÷1,6mm
Packaging Type
Drums, B300, D200 and D100 spools.
Drums, B300, D200 and D100 spools.
Description

Application

This ferritic stainless steel welding wire is designed for welding Type 409 and 409Ti base materials. The incorporation of niobium enhances corrosion resistance and fosters a ferritic microstructure. Distinguished from ER409 by the addition of niobium, which aids in forming niobium carbides (NbC) to prevent the development of chromium carbides (Cr3C2), this variant significantly improves corrosion resistance. Moreover, the introduction of niobium enhances strength at elevated temperatures. These consumables are ideal for welding similar 12% Cr ferritic steels, especially in exhaust system components like manifolds, mufflers, catalytic converters, and tubing. To achieve optimal welding results, it is advised to employ a low-heat-input procedure, and caution should be exercised when considering multi-pass applications.

Alloy Type

Ferritic stabilized stainless solid welding wire of 12% Cr and 0,4% Nb type.

Microstructure

Ferrite.

Materials

Used for welding similar 12% Cr ferritic steels.
ASTM: 409, 409Ti, 409Nb, 439, 430.

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