FusoFlex

Ultimate-18(SPL)NC:

Useful several stringent applications, demanding the best in terms of total weld quality, this unique electrode is capable of yielding welds which are of radiographic quality, combined with exceptionally high impact strength and crack resistance. Thus it is suitable for a very wide range of grain-refined steels having tensile strength in the range of 500 to 600 N/mm², as well as difficult steels containing higher carbon or higher levels of sulphur and other impurities. In addition, weld metal is suitable for sour service.

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. In particular, it displays remarkable impact resistance at subzero temperatures down to minus 50°C.
Sulphide Stress Corrosion Cracking test as per NACE standard TM-01-77 &.
Hydrogen Induced Cracking test as per NACE Standard TM-0284. .
It is suitable for prolonged SR at 620°C with holding period upto even 10 hours. .
It is recommended for high thicknesses (over 50mm) of base material (eg. A 516 Gr. 70) meant for sour service. For such high thicknesses, ULTIMATE-18 (SPL) NC is recommended in place of Ultimate-18 NC (E7018).

Identification:Name Printed

Application:

Boilers
Off-shore drilling rigs & Platforms
Frigates & Submarines
Rotary kiln shells
Bridges
Pumps and Compressors
Pressure vessels
Blast furnace shells
Machinery for earth moving & road building
Rail wagons & coaches

Chemical analysis of all weld deposits(%):

Carbon	Manganese	Silicon	Sulphur	Phosphorus
0.08	1.10-1.60	0.50	0.008	0.015

All weld mechanical properties:

Ultimate Tensile Strength kg/mm²	Yield Strength kg/mm²	Elongation (L=4d)%	CVN Impact Value Joules at 50°C
53-62	46-52	26-32	60-120

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	110-135	150-190	200-270	270-320
Pieces per carton	125	90	60	40	25

Notes on usage:

Ensure that electrodes are dry. It is a safe practice to redry electrodes for one hour at 300°C and then to keep them in a holding oven maintained at 80°C-100°C, prior to use.
Keep the arc as short as possible & minimise weaving.
Clean the weld area of any surface contamination.
It is a good practice to preheat the joint faces to about 100°C at the commencement of the working shift, especially in the morning, to expel moisture & any traces of oil/grease.