A highly basic, agglomerated flux with a chemical composition and a production method, which guarantees almost neutral metallurgical reactions. This flux offers low oxygen and low hydrogen potentials, which permits submerged-arc welding of crack-sensitive heat treatable or heat resistant low-alloy steels and high-alloy martensitic materials. When shape- or build-up welding, for example in turbine rotor or disc repairs, constant chemistry of the deposit and high deposition rates can be achieved, even with multi–wire processes.EN 760: SA FB 1 55 DC H5 shows good welding characteristics with smooth tie-in and weld bead appearance without slag inclusions or “tiger-tracks”, even when high interpass temperature are experienced. Slag is self–detaching, including in narrow-groove joints. EN 760: SA FB 1 55 DC H5 is a next-to-neutral flux, without Cr-, Ni- or Mo-compensation. Due to pre-fused raw materials the alloy vectors of the flux (metallurgical reactions) are constant and nearly independent of the welding parameters.

Classification:

ISO 14174: S A FB 1 55 DC H5 *)
(EN 760: SA FB 1 55 DC H5)

Characteristics 

Characteristic chemical constituents

Welding Positions:

Flux density: 1.1 kg / dm3 (l)
Grain size acc. to ISO 14174: 2 – 20 (Tyler 8 x 65)
Current-carrying capacity: up to 800 A CD using one wire

*) Diffusible hydrogen content H5: determined in deposited metal acc. to the method described in ISO 3690
Type of current DC; redrying conditions 300 – 350°C.

Metallurgical behaviour acc. to ISO 14174 type of current DC

Welding Flux

Application

Designed originally for joining soft-martensitic metal (13Cr4Ni / CA6NM) or shape-welding and surfacing of turbines in combination with solid and metal-powder cored wires such as 410NiMo. Due to its welding characteristics, EN 760: SA FB 1 55 DC H5 can be combined with many standard low-alloy wires for joining of fine-grained structural steels, heat-resistant or heat-treatable low-alloy CrMo(Ni)-materials as used in the fabrication of components for the chemical / petroleum and power industries.Also applicable for joining of the new supermartensitic steels 13Cr4.5Ni3Mo together with 13Cr6Ni3Mo-wire.