DAIKOWM S2

GMAW
  • CARBON STEELS
STRUCTURAL STEEL

Description

Copper coated GMAW wire for welding carbon and C-Mn steels
Copper coated wire for automatic and semiautomatic GMAW welding of C-Mn steels, structural steels, pressure vessels steels, fine-grained steels, etc. Suitable for single pass or multipass welding of non alloy steels. It can be used for boilers fabrication, industrial machinery construction, car production. The minimum guaranteed yield reaches a maximum of 460Mpa for applications down to -40 ° C.
Specifications
ISO 14341-A
G 42 3 M21/C1 2Ti
AWS A5.18
ER70S-2
Shielding
M21, C1
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)
1
Chem. Comp. %
DEFAULT
C
0.06
Mn
1.1
Cr
0.01
Al
0.1
P
0.012
S
0.012
Si
0.5
Cu
0.15
Mechanical Properties
min
variant
Tensile strength Rm MPa
490
520
Yield strength Rp0.2 MPa
420
440
Elongation A (L0=5d0) %
22
28
Impact Charpy ISO-V
27J @ -30°C
70J @ -20°C
Impact Charpy ISO-V
-
-
Welding Parameters
1.2 mm
Ampere
150A - 310A
Voltage
28V - 32V
Packaging
Ø 0,8÷1,6mm
Packaging Type
Drums, B300, D200 and D100 spools.
Description

Application

Carbon-manganese (C-Mn) steels serve as the predominant structural steels extensively used across various applications in the engineering industry. Successful welding of C-Mn steel fabrications is generally achievable, provided the steel composition is known, necessary precautions are taken, and qualified procedures are adhered to. Weldability varies among C-Mn steels, with potential cracking mechanisms, including hydrogen cracking, solidification cracking, and reheat cracking, depending on specific circumstances. These consumables effectively resist such issues, emphasizing the importance of a meticulous welding procedure. While preheat and post-weld heat treatment (PWHT) may not be universally required, the actual specifications depend on the grade and thickness of the base material being welded. Attaining the required mechanical properties in a welded joint with C-Mn steels is achievable through the use of appropriate welding consumables. However, the intricate structural changes during the weld thermal cycle necessitate careful evaluation of properties such as heat-affected zone (HAZ) toughness and hardness.

Alloy Type

Consumables for welding mild and C-Mn steels of 340-510MPa tensile strength.

Microstructure

Predominantly ferrite.

Materials


EN W.Nr.: EN AW-Al 99,0 (1200), EN AW-Al 99,7 (1070A), EN AW-Al 99,5 (1050A), EN AW-Al 99,5 (1350), EN AW-Al 99,8 (1080A).

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