G-TECH 318R

SMAW
  • AUSTENITIC STAINLESS STEELS
318

Description

Rutile coated electrode for Ti or Nb stabilized grades of Mo bearing austenitic stainless steels
Its rutile coating ensures excellent weldability in all positions, except for vertical down, and a high resistance to cracking providing smooth arc transfer. High current carrying capacity, minimum spatter formation and virtually self-cleaning slag produce a concave bead with minimal ripple as well as a smooth and clean weld profile. These electrodes are used to weld Ti or Nb stabilized grades of Mo bearing austenitic stainless steels. Niobium provides resistance to intergranular chromium carbide precipitation and thus increased resistance to intergranular corrosion.
Specifications
EN ISO 3581-A
E 19 12 3 Nb LR 12
AWS A5.4
E318-17
Shielding
-
Positions
PA, PB, PC, PD, PE, PF
Current
DC+, AC
Packaging Type
Carton box
Asme qualifications
F-No (QW432)
5
A-No (QW442)
8

Ferrite

3-14 FN

Pren

26.26
Chem. Comp. %
DEFAULT
C
0.03
Mn
0.9
Ni
12
Cr
19
P
0.02
S
0.02
Mo
2.2
Si
0.75
Mechanical Properties
min
variant
Tensile strength Rm MPa
510
580
Yield strength Rp0.2 MPa
320
420
Elongation A (L0=5d0) %
25
30
Impact Charpy ISO-V
-
70J @ 20°C
Impact Charpy ISO-V
-
-
Welding Parameters
2.5 mm
3.2 mm
4.0 mm
5.0 mm
Ampere
50A - 80A
80A - 110A
110A - 150A
160A - 210A
Voltage
-
-
-
-
Packaging
56 pcs/kg
28 pcs/kg
19 pcs/kg
12 pcs/kg
Packaging Type
Carton box
Carton box
Carton box
Carton box
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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