DAIKOFLUX 470-W

SAW
  • CARBON STEELS
STRUCTURAL STEEL

Description

Designed for all SAW processes and welding of ordinary carbon-manganese, low alloy structural and boiler quality steel with yield strength up to 355 N/mm² (thickness<25 mm) in combination with wire grades DAIKOWS S2, S2Si, Mo.B and 1CrMo. The flux is suitable for high speed, up to 2 meters/minute, and provides very good weld bead appearance and excellent slag release even with small angle preparation and fillet welds. Its chemical nature provides high resistance to cracking on single pass applications. Additional features are resistance to porosity when welding rusty plates, heavy scale or other conditions of plate surface (e.g. special primers coatings) and low sensitivity towards arc blow.
Preferably used for single-run, two run and fillet welding. Main field of applications are LP-gas cylinders, structural steel works, thin-walled containers and fin-tube walls.
Specifications
EN ISO 14174
S A AR 1 87 AC
Werkstoff Number
11
boniszewski_index
0.6
Packaging Type
25 kg Plastic Bagmetallic Drum
Chem. Comp. %
0
SiO2+TiO2
25
Al2O2+MnO
55
CaO+MgO
5
CaF2
10
Others
5
Description

Application

Carbon-manganese steels (C-Mn) are the backbone for a wide range of applications in the structural engineering industry. Welding of these steel structures can be successfully achieved provided the material composition is known, appropriate precautions are adopted, and qualified procedures are followed. Weldability varies based on the type of C-Mn steel, and there is a risk of defects such as hydrogen cracking, solidification cracking, or reheat cracking, which depend on specific operating conditions. The proposed consumables offer effective resistance to these issues, emphasizing the importance of a carefully defined welding process. Preheating and post-weld heat treatment (PWHT) are not always necessary, but their adoption depends on the type and thickness of the base material. The desired mechanical properties in the welded joint can be achieved using appropriate consumables. However, the complex structural transformations that occur during the welding thermal cycle require careful evaluation of critical parameters such as the toughness and hardness of the heat-affected zone (HAZ).

Alloy Type

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

Microstructure

Predominantly ferrite.

Materials

Carbon and carbon-manganese steels encompass a wide range of structural and pressure-grade materials commonly used in construction, mechanical engineering, and industrial plant applications. Among the EN-standardized grades are non-alloy structural steels intended for general use, known for their good weldability and progressively higher mechanical strength. The “P” grades, on the other hand, are pressure vessel steels typically used in boilers and heat exchangers. Equivalent ASTM specifications cover a similar scope of applications and are widely adopted internationally for structural components, piping, and fittings exposed to pressure or high temperatures. Lastly, API specifications are typical of the oil & gas sector, particularly for the production of pipelines used in hydrocarbon transport, offering increasing levels of mechanical strength and specific performance requirements.
  • EN W.Nr.: S 235 JR, S 235 J0, S 235 J2+N, S 275, S 275 J0, S 275 J2+N, S 355 JR, S 355 J0, S 355 J2+N, S 355 K2+N, P 235 GH, P 265 GH, P 295 GH
  • ASTM: A36, A106 gr. A, A106 gr. B, A106 gr. C, A139, A210 gr. A1, A210 gr. C, A234 gr. WPB, A334 gr. 1, A216 gr. WCA, A216 gr. WCB, A216 gr. WCC
  • API: A, B, X42, X52, X60

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