DAIKOWM 318Si

GMAW
  • 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. The higher silicon content (if compared with standard 318L) increases the welding fluidity and improve the bead appearance.
Specifications
EN ISO 14343-A
G 19 12 3 N
AWS A5.9
(ER318)
Certifications
CE, TUV
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)
8

Ferrite

3-14 FN

Pren

27.58
Chem. Comp. %
0
C
0.03
Mn
1.3
Ni
11.5
Cr
19
P
0.02
S
0.01
Mo
2.6
Si
0.75
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 @ -196°C
Impact Charpy ISO-V
-
-
Welding Parameters
1.0 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.
318
Description

Application

This electrode is ideal for welding titanium or niobium-stabilized austenitic stainless steels containing molybdenum. It can also be used as an alternative for welding unstabilized grades such as 316/316L. However, it is not recommended for structural applications exceeding 400 °C nor for cryogenic uses. Furthermore, it is employed for depositing corrosion-resistant overlays and for forming valve seat inserts on medium carbon steels. This electrode is generally supplied with a typical ferrite content ranging from 3 to 14 FN. No preheat operation is required and the maximum interpass temperature is set at 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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