Fluoride – basic type

Welding flux for submerged–arc welding process


Geeflux 541 MHD is an agglomerated fluoride-basic type flux, preferably used for welding various grades of steel such as ASTM A516 Gr 70 or equivalent, Nace Grade steel/pipes such as ASTM 106 Gr B or equivalent etc. Owing to its neutral behaviour as to the pick up and burn-out of the elements silicon and manganese, it is advisable to use wire electrodes having a higher silicon and manganese content. Geeflux 541 MDH flux is suitable to be employed for welding processing off-shore components.The weld metal produced in combination with EH 10K MDH electrode meets high toughness requirements at subzero temperature. Welds are uniformly shaped, without constriction and undercuts. The flux is suitable to be used on DC, positive pole, or AC up to about 1000A.

Damp flux must be redried at 300-350°C for 2hrs

Constitu-ents :

Sio2 +TiO2 Cao+MgO Al2O3+MnO CaF2
15% 40% 20% 25%

Basicity according to Boniszewski: Approx. 3.0

All – Weld metal analysis typical values in %

Wire EH 10K  

Geeflux 541 MDH

C = 0.12 max
Si = 0.20 – 0.50
Mn = 1.0 – 1.60
S = 0.012 max 
P = 0.015 max
Cu = 0.035 max 

Mechanical properties of the deposited weld metal :


As welded Ultimate Tensile Strength MPa 0.2% Proof Stress MPa


(%) (L=4D)

Charpy V-notch Impact strength in joules
EH 10K          (Geeflux 541 MDH) 510-620 450-550 24-32 Temp Joules