DAIKOMCW 66

FCAW
  • CARBON STEELS
WEATHERING STEEL-Cor-Ten®

Description

Metal all position flux cored wire
Seamless copper coated metal cored wire with Ni-Cu-Cr additions for gas-shielded metal arc welding of weathering and fine grain structural steels such as Patinax or Cor-ten. Virtually spatter free in the spray-arc range. Particularly suitable for robotic applications. It ensures good edge wetting, finely rippled welds, little oxide formation on the weld surface making multipass welding possible without inter-run cleaning. The weld profile is easily controllable making this wire well suited for gap bridging and positional welding.
Specifications
ISO 17632-A
T 46 6 Z M21 M 1 H5
AWS A5.36
E81T15 M21 H4
Shielding
M21
Positions
PA, PB, PC, PD, PE, PF, PG
Current
DC+
Packaging Type
BS300, D200 spools
Asme qualifications
F-No (QW432)
6
A-No (QW442)
1
Chem. Comp. %
DEFAULT
C
0.06
Mn
1.2
Cr
0.3
P
0.025
S
0.025
Si
0.45
Cu
0.5
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
550
Yield strength Rp0.2 MPa
460
420
Elongation A (L0=5d0) %
17
22
Impact Charpy ISO-V
47J
47J @ -60°C
Impact Charpy ISO-V
-
-
Welding Parameters
1.2 mm
1.6 mm
Ampere
130A - 290A
170A - 400A
Voltage
18V - 30V
28V - 32V
Packaging
Ø 1,0÷1,6mm
Ø 1,0÷1,6mm
Packaging Type
BS300, D200 spools
BS300, D200 spools

Application

Primarily engineered for weathering steels that incorporate a controlled copper addition, this weld metal offers an enhanced level of corrosion resistance and a more stable patina compared to plain carbon-manganese (C-Mn) steel. It finds versatile applications in architectural structures, bridges, exhaust gas flues, and chimneys. The weld metal stands out for its robust resistance to preferential corrosion in seawater, particularly in the harsh conditions of arctic waters characterized by heightened levels of oxygen and salinity. Its utility extends to welding micro-alloyed and C-Mn steels, making it a valuable choice for fabricating ice-breaker vessels and offshore structures. To optimize the welding process, a thoughtful approach to preheating, based on joint thickness and restraint considerations, is advisable. Typically, the material is left in the as-welded condition, eliminating the necessity for post-weld heat treatment (PWHT). This characteristic underscores the material's efficiency and practicality in various welding applications, ensuring reliable performance in corrosive and challenging environmental conditions.

Alloy Type

Low alloy steel with Ni-Cu-Cr additions for welding weathering steels.

Microstructure

In the as-welded condition the microstructure is ferritic with a high proportion of acicular ferrite for optimum toughness.

Materials


EN W.Nr.: S235JRW (1.8960), S235J2W (1.8961), S235J0W (1.8958), S275J0W, S275J2W, S355J0W (1.8959), S355J2W (1.8963), S355J0WP (1.8945).
ASTM: A588 gr. A, B, C, K, A242 gr. 1, 2.
PROPRIETARY: Cor-Ten® A, B (US Steel), Patinax® (Thyssenkrupp).

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