LOW HYDROGEN - LOW CARBON ELECTRODE FOR WELDING SPECIAL APPLICATIONS OF 2.25Cr-1Mo STEELS
RD-18B3L
CLASSIFICATION
AWS A5.5 E8018-B3L | EN ISO 3580-B E5518-2C1ML | JIS Z 3223 DT2415
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 powder, is extruded onto a high purity ferritic core wire with a blend of silicated 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
PLATES TO : BS1501Grades 622, ASTM A387 Grade 21 & 22
FORGINGS TO : BS1503 Grade 622 & 660
CASTINGS TO : BS1504 Grade 622 & 660, BS3100 Grade B3 & B7 ASTM A217 WC9.
PIPES TO : BS3604 Grades 622, ASTM A335 Grades P22
TUBES TO : BS3059 Grade 622/640 and 622/490. ASTM A199, A200 & A213 Grades T22, T36 & T4. A182 F22. HEAT AND CREEP RESISTANT UP TO 600 °C.
The low carbon ensures lower hardness and residual stresses giving resistance to sulphide stress corrosion cracking in wet sour environments. Also of value when welds cannot be PWHT.
WELDING AMPERAGE AC and DC
OTHER DATA
Electrodes that have become damp should be re-dried at 150oC for 1 hour
