Low Hydrogen - Iron Powder Electrode For Welding Creep Resisting Mo-Containing Ferritic Steels Operating Up To 450ºC
RD-718A
SPECIFICATION
AWS A5.5 | EN ISO 3580-A
CLASSIFICATION
E7018-A1 | E Mo B
PRODUCT DESCRIPTION
The design emphasis of the chemically basic flux is engineered to ensure the optimum weld metal properties demanded by the specification are fully met. The basic flux containing the appropriate alloying elements with a controlled balanced addition of iron power, is extruded onto a high purity ferritic core wire with a blend of silicates that ensures both coating strength and a coating resistant to subsequent moisture absorption.
WELDING FEATURES OF THE ELECTRODE
The chemical nature of the flux together with a significant proportion of iron powder ensures maximum deposition efficiency without detracting from its ability
to be used in all positions except vertical down. Overall the arc is very stable, slag detachability is good and metal recovery is some 115% with respect to the core wire.
APPLICATIONS AND MATERIALS TO BE WELDED
Nominal 0.5Mo content improves elevated temperature performance of weld metal over C:Mn types operating at 450ºC. Materials to be welded include:
ASTM A335-P1 A209 and A250-Tl BS3059-243-3606-243-245 2U Forged ASTM A336-F1 A204 A, B and C. Cast ASTM A217-WC1 A352-LC1
WELDING AMPERAGE AC and DC
OTHER DATA
Electrodes that have become damp should be re-dried at 150oC for 1 hour
