RAAJMELT-4 (AWS A 5.17 F7 A5 -EM12k)

An agglomerated aluminates basic type submerged arc welding flux

Classification:

AWS/SFA : A.5.17
Grades: F7A4-F7P4-EL8, F7A5-F6P4-EM12K
Basicity Index (B.I.) : 1.50

Characteristics:

Raajmelt-4 is an agglomerated aluminates basic type submerged arc welding flux designed for very high current carrying capacity on both AC and DC. Suitable for single, double, and multi-wire systems, it provides excellent sub-zero and low-temperature impact resistance. Compatible with EL8 and EM12K wires.

Typical Applications:

Welding general structural steels, pressure vessels, pipe steels, and fine-grain steels
Boiler drums and similar heavy fabrications
Fillet welding and single or multi-pass butt welding of low, medium, and high tensile steels
Single wire, tandem, and multi-wire welding for increased productivity

Drying Requirement:

Redrying recommended at 300-350°C for one hour before use.

Main Constitutions (%)
SiO2 + TiO2	CaO + MgO	Al2O3 + MnO	CaF2	S	P
15-20	25-30	15-20	20	≤0.07	≤0.07

All Weld Metal Chemical Composition (Typical %)
Wire	C	Mn	Si	S	P
RAAJSAW-1	0.080	1.40	0.50	0.016	0.020
RAAJSAW-2	0.080	1.60	0.35	0.014	0.021

All Weld Metal Mechanical Properties (Typical)
Wire	YS (N/mm²)	UTS (N/mm²)	Elongation (%)	Charpy “V” Notch Impact @ -40°C	Charpy “V” Notch Impact @ -46°C
RAAJSAW-1	440	520	26	50 J	—
RAAJSAW-2	480	550	24	80 J	50 J

Raajratna offers a wide range of submerged Arc welding fluxes for SA welding.

Packing Specification: Packed in polythene-lined paper bags of 25.00 kg net weight.