DAIKOWS 318

SAW
  • AUSTENITIC STAINLESS STEELS
318

Description

Solid wire for stabilised austenitic stainless steels
This composition is identical to ER316, except for the addition of niobium. Niobium provides resistance to intergranular chromium carbide precipitation and thus increased resistance to intergranular corrosion. It is also used for depositing corrosion resistance overlays and valve seat inlays on medium carbon alloy steel and to join Ti or Nb stabilized grades of Mo bearing austenitic stainless steels. Resistant to intergranular and wet corrosion up to 400°C.
Specifications
ISO 14343-A
S 19 12 3 N
AWS A5.9
ER318
Shielding
DAIKOFLUX 900-W
Positions
PA, PB, PC
Current
DC/AC
Packaging Type
K415 spool and drums.
Asme qualifications
F-No (QW432)
6
A-No (QW442)
8

Ferrite

3-14 FN

Pren

28.08
Chem. Comp. %
DEFAULT
C
0.04
Mn
1.3
Ni
11.5
Cr
19.5
P
0.02
S
0.01
Mo
2.6
Si
0.4
Mechanical Properties
min
variant
Tensile strength Rm MPa
510
620
Yield strength Rp0.2 MPa
320
400
Elongation A (L0=5d0) %
25
30
Impact Charpy ISO-V
-
40J @ -100°C
Impact Charpy ISO-V
-
-
Welding Parameters
2.4 mm
Ampere
300A - 400A
Voltage
27V - 33V
Packaging
Ø 2,0÷4,0mm
Packaging Type
K415 spool and drums.
318
Description

Application

These consumables are formulated for welding molybdenum-bearing austenitic stainless steels stabilized with titanium or niobium. Alternatively, they can be utilized for unstabilized grades like 316/316L. However, it is not advisable for structural service exceeding approximately 400°C or for applications in cryogenic conditions. Such filler metals are versatile, finding application in depositing corrosion-resistant overlays and valve seat inlays on medium-carbon alloy steels. Typically, they are supplied with a ferrite content ranging from 3-14FN. Operating guidelines include no preheating requirement and a recommended maximum interpass temperature of 250°C.

Alloy Type

Nb stabilized, Mo-bearing stainless steel.

Microstructure

Austenite with 3-14FN (3-12% ferrite), typically 10FN.

Materials


EN W.Nr.: 1.4571 (X6CrNiMoTi17-12-2), 1.4573 (X10CrNiMoTo18-12) , 1.4579 (X6CrNiMoTi17-12-2S), 1.4581 (X5CrNiMoNb19-11-2), 1.4580 (X 6 Cr Ni Mo Nb 17 12 2), 1.4583 (X10CrNiMoNb18-12), +
ASTM: 316Ti, 316Cb, CF10MC.
UNS: S31635, 31640.

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