Welding Fluxes

Magnesium oxide
Magnesium oxide
Magnesium oxide

Welding is the dominant technique for joining metals in a variety of industries such as automotive/transportation, construction, pipelines, ship buildings, oil refinery, power generation, and many others.

When the welding material is in its molten state, it tends to absorb and become contaminated with oxygen and nitrogen from the atmosphere, which causes the solidifying weld to become porous and brittle. The main technique applied to prevent this phenomenon is the use of fluxes, such as flux coated stick electrodes, flux cored wires and agglomerated fluxes. 

The agglomerated fluxes, which are mainly used in the Submerged Arc Welding, are complex formulations of several ingredients, in powder form, including magnesium oxide (MgO). The amount of MgO varies from 5-20% according to the type and use of the flux while for some specific products can go up to 40%. Its main role is the adjustment of the slag properties such as the viscosity and the refractoriness, that affect the pock marks formation, detachability, slag inclusion in the weld and shape / appearance of the welded metal.

Grecian Magnesite produces and commercializes a distinct range of Magnesium Oxide (Deadburned-Sintered Magnesia) free flowing powders, under the brand name SM, namely SM-88, SM-90 & SM-96 for the welding industry. 

Our SM powders have been used for more than two decades by the leading welding manufacturers around the world, with excellent results. To this day, Grecian Magnesite is recognized as a foremost supplier to the industry offering highly consistent - superior performance – products, which improve both the manufacturing process and end-product quality.  Our technical support, on time delivery, supply security and price stability, are equally important factors that help our customers to improve their competitiveness.

Grecian Magnesite’s SM Powders for high quality fluxes:

•    Enhanced properties

The nature of our mineral deposits (microcrystalline type of magnesite, CaO/SiO2 forsteritic ratio) together with our extensive know-how in calcination (sintering) of magnesite, result to the production of the SM Powders with a suitable microstructure and mineralogical composition to cover the stringent requirements of the application, such as:
-    High melting point – High refractoriness
-    High resistance to hydration – Low hydrogen concentration in the weld
-    High bulk density
-    Very low Loss on Ignition (L.O.I)

Furthermore, the chemical purity of our magnesite and the careful control of sintering parameters assure the production of consistent products with very low content of undesirable impurities such as C, P and S.

•    Ready to blend

During the final stage of the manufacturing process, milling, sieving and packing is performed in a continuous operation.  Grecian Magnesite’s dedicated installations, along with our experienced & skilled personnel, ensure the uniform production of the SM - welding - powders with the correct particle size, shape and distribution. We supply our customers tailor made - ready to blend products; for fluxes with consistent composition and good strength.

To determine the most suitable product for your specific needs, please call us at +30 210 7240446-7 or e-mail us at info@grecianmagnesite.com with your questions.