DAIKOFCW 16-5-1

FCAW
  • FERRITIC - MARTENSITIC STAINLESS STEEL
248SV

Description

Flux cored wire for 16%Cr-5%Ni-1%Mo martensitic stainless steels
The wire is designed for welding corrosion resistant martensitic ferritic stainless steels of similar composition, type Outokumpu 248SV. It combines good toughness with excellent resistance to cavitation and to stress corrosion cracking. Typical applications include repairing of casting defects, fabrication and rebuilding on components used in the water turbines and pump. A PWHT in the range of 580°C-620°C is advised to obtain a good combination of ductility, corrosion resistance and cavitation resistance.
Specifications
Shielding
M21
Positions
PA, PB, PC
Current
DC+
Packaging Type
BS300 spool

Pren

18.9
Chem. Comp. %
DEFAULT
C
0.03
Mn
1
Ni
4.5
Cr
15.6
P
0.01
S
0.01
Mo
1
Si
0.5
Mechanical Properties
min
variant
Tensile strength Rm MPa
-
900
Yield strength Rp0.2 MPa
-
750
Elongation A (L0=5d0) %
-
17
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Welding Parameters
1.2 mm
1.6 mm
Ampere
120A - 290A
180A - 350A
Voltage
20V - 30V
30V - 34V
Packaging
Ø 1,2÷1,6mm
Ø 1,2÷1,6mm
Packaging Type
BS300 spool
BS300 spool
Description

Application

The weld metal deposit is predominantly martensitic in nature, a characteristic that provides an excellent combination of toughness and cavitation resistance, as well as mitigating stress corrosion cracking. Typical applications include the repair of casting defects and the manufacture and reconstruction of components for turbines and hydraulic pumps, as well as the maintenance and restoration of marine propellers. It is essential to maintain the interpass temperature below 150 °C and a heat input not exceeding 1.5 kJ/mm to maximize the impact toughness of the weld metal, particularly in direct welding conditions. A post-weld heat treatment between 580 °C and 620 °C is recommended, which allows for the formation of tempered martensite that combines ductility with resistance to corrosion and cavitation.

Alloy Type

16% Cr – 5% Ni – 1% Mo soft martensitic deposit.

Microstructure

Ferrite and martensite.

Materials

Designed for welding corrosion resistant martensitic- ferritic stainless steels of similar composition, such as Outokumpu 248SV.
  • EN W.Nr.: 1.4418 (X4 CrNiMo 16-5-1), 1.4405 (X5 CrNiMo 16 5)
  • PROPRIETARY: 248SV (Outokumpu)

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