DAIKOWM 347

GMAW
  • AUSTENITIC STAINLESS STEELS
347

Description

Solid wire for stabilised austenitic stainless steels
These Cr-Ni consumables are Nb-stabilized for welding steels grades, such as 321 and 347, that are stabilized with Ti or Nb. The presence of Nb reduces intergranular corrosion under severe operation conditions. Also suitable for cladding as on mild steel after a 309 buffer layer. Service temperatures are typically -100°C to about 400°C. If dilution by the base metal produces a low ferrite or fully austenitic weld metal, the crack sensitivity of the weld may increases substantially.
Specifications
ISO 14343-A
G 19 9 Nb S
AWS A5.9
ER347
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

3-12 FN

Pren

19.165

Hardness

84HRB
Chem. Comp. %
DEFAULT
C
0.05
Mn
0.7
Ni
10
Cr
19
Nb
0.4
P
0.02
S
0.01
Mo
0.05
Si
0.9
Cu
0.07
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
650
Yield strength Rp0.2 MPa
350
400
Elongation A (L0=5d0) %
25
32
Impact Charpy ISO-V
-
110J @ 20°C
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.
347
Description

Application

Developed for welding Ti and Nb-stabilized 18Cr/8Ni stainless steel types 321 and 347, they are also suitable for unstabilized grades like 304/304L. Service temperatures typically range from -100°C to about 400°C. The applications parallel those of 308L, covering diverse sectors such as food, brewery, pharmaceutical equipment, architectural and general fabrication, and nuclear engineering. However, the 347 consumables mentioned here are generally unfit for elevated temperature structural applications where 0.04-0.08% carbon is specified for creep resistance; for such cases, consult data sheets 347H. For cryogenic uses requiring >0.38mm (15mils) Charpy lateral expansion at –196°C, select unstabilized weld metal with low carbon and controlled ferrite. No preheating requirement, a recommended maximum interpass temperature of 250°C, and no post-weld heat treatment (PWHT) necessity.

Alloy Type

347 austenitic stainless steel for joining 321 and 347 base materials.

Microstructure

Austenite with a controlled level of ferrite, normally in the range 3-12FN.

Materials


EN W.Nr.: 1.4541, 1.4543, 1.4561, 1.4550, 1.4552 (cast).
ASTM: 321, 347, CF8C (cast).
UNS: S32100, S34700.

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