FusoFlex

Coromate(Extra)

Hydrogen controlled, basic coated electrode, designed for welding of (a) low alloy high strength steels, (b) weathering (atmospheric corrosion resistant) steels represented by ASTM A 242 & 588, such as CORTEN-A&B, D40S, SAILCOR. While incorporating requisite alloying elements - Cu, Cr, Ni - in weld metal for the purpose of corrosion resistance in marine environment, care has been taken to confer on weld metal exceptionally high degree of ductility and notch toughness. Another feature is the low level of diffusible hydrogen (below 5ml/100g.) in weld metal, so as to reduce risk of HIC in HAZ or weld metal.

Ease of operation in all positions
Smooth and stable arc which is easy to strike & restrike, combined with low spatter and with due control on molten pool
Slag detachability with little effort.
Finely rippled bead with regular profile.
Welds of consistent X-ray quality.
Weld metal which possesses excellent mechanical properties and displays resistance to cracking caused by heavy stresses and/or hydrogen.
Resistance to atmospheric corrosion.

Identification:Name Printed

Chemical analysis of all weld deposits(%):

Carbon	Manganese	Silicon	Sulphur	Phosphorus	Chromium	Nickel	Copper
0.10	0.6-1.0	0.25-0.65	0.020	0.025	0.50	0.60-1.20	0.40-0.65

All weld mechanical properties:

Ultimate Tensile Strength kg/mm²	Yield Strength kg/mm²	Elongation (L=4d)%	CVN Impact Value Joules at 20°C
56-65	46-54	26-32	60-100

Welding current ranges and packing data for sizes manufactured:

Dia (mm)	2.5	3.15	4.0	5.0	6.3
Length(mm)	350	450	450	450	450
Current(Amp)(DC+ or AC 70V)	80-100	110-140	160-190	220-260	270-350
Pieces per carton	125	90	60	40	25

Notes on usage:

Use short arc to the extent possible.
Use of DC + is recommended for achieving high standard of weld quality. .
Redry the electrodes at 250°C for one hour, and for best results at 350°C for one hour. .
Control preheat and interpass temperature below 150°C.
On account of the exceptionally high quality of weld metal and the low level of diffusible hydrogen, welding operation is facilitated. If the joint faces are thoroughly cleaned of moisture and foreign matter, preheating can be avoided