Subtec BFB-M (A.W.S. F7A2-EM12K)

 

Basicity Index: 3.4

 

Description

Subtec BFB-M is an agglomerated submerged arc flux. It is known as a fluoride-basic flux and though it was developed as a joining flux for solid 300 series stainless steel wires and as a cladding flux for 400 series cladding wires, it can also be used with low carbon, solid steel sub-arc wires (S1 and S2) to produce welds with excellent mechanical properties. This flux is primarily used with flux-cored cladding wires. The flux is neutral which means that there is no pick-up of elements from the flux into the weld metal. 

 

Typical Chemical Analysis of the Weld Metal (With Subtec S2 Wire)

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Typical Mechanical Properties of the Weld Metal (With Subtec S2 Wire)

 

 

 

 

 

 

 

 

 

 

 

Packaging and Control

Subtec BFB-M is packed in multiple layered paper sacks of 25kg which are 200 micron thick. One of the layers is plastic coated to act as a moisture repellent. The higher the basicity index of agglomerated fluxes, the more hydroscopic the flux. It is recommended that all agglomerated fluxes are stored in conditions of less than 70% relative humidity as welding with damp flux can cause porosity. Re-drying of flux which is suspected of being moist should take place for approximately 2 hours at about 300°C at a flux depth of about 25mm.