SF 401


EN ISO 14174 S A FB 1
TS EN ISO 14174 S A FB 1

Properties and Applications

Fluoride-basic type, agglomerated submerged arc welding flux with high basicity, it is designed for the welding of high strength fine grained structural steels, cryogenic steels and steels, resistant to ageing. Generally used for the welding of thick sections in the offshore, wind tower, nuclear and pressure vessel industries. Provides very high toughness values at low temperatures, in combination with approved wires. Due to it's high current carrying capacity and good operating characteristics both on alternative and direct currents, possible to use in one side welding and two side welding processes by single or multi-wires (tandem/twin). Owing to it's neutral behaviour, it is advisable to use wire electrodes having higher manganese and silicon content in tandem and multi wire applications. Has high penetration, smooth weld beads with high X-ray quality.
Sf 401 Sert Dolgu

Typical Chemical Values of Weld Metal

Welding WireType of AnalysisCSiMnMo
SW 702 MoWeld Deposit0.070.201.400.40
SW 702SiWeld Deposit0.060.301.15 
SW 703SiWeld Deposit0.070.301.60 

Typical Mechanical Values of Weld Metal(%)

Test ConditionWelding WireYield Strength (N/mm²)Tensile Strength (N/mm²)Elongation A5 (%)Charpy V-Notch Properties (J)
As weldedSW 702 Mo50057028-30°C → 90-40°C → 70-46°C → 50
As weldedSW 702Si42552030-30°C → 110-40°C → 90-50°C → 70
As weldedSW 703Si48053028-30°C → 120-40°C → 100-50°C → 80

Wire-Flux Combinations Standards

Welding WireEN Designation of WireEN ISO/TS EN ISO 14171 - AAWS Designation of WireAWS/ASME SFA 5.17/SFA 5.23
SW 702 MoS2MoS 46 4 FB S2MoEA2F8 A5 EA2
SW 702SiS2SiS 42 5 FB S2SiEM12KF7 A6 EM-12K
SW 703SiS3SiS 46 5 FB S3SiEH12KF7 A8 EH-12K

Application Information

Welding Positions :
Sf 401 Kaynak Pozisyonu Sf 401 Kaynak Pozisyonu Sf 401 Kaynak Pozisyonu


Sf 401 Kutuplama DC(+)

Welding Parameters & Efficiency :

Packaging Information

Product CodeWeight Of The Box (kg)Boxes Per PackageWeight Of The PackagePackaging Type
401040AGM225.0125.6Kraft Bag
401040JGM225.0125.6DRY PACK PE TORBA

Storage & Re-Drying Information

>During transportation and storage, it should be ensured that the packaging is not damaged or torn.
>It has to be dried at 350°C for 2 hours.