LOW HYDROGEN - IRON POWDER ELECTRODE FOR WELDING STRUCTURAL STEELS SUBJECTED TO A SERVICE TEMPERATURE OF -50 0C
RD-18G
CLASSIFICATION
AWS A5.5 E8018-G | EN ISO 18275-A E 55 4 Mn1Ni 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 powder, 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
PRESSURE VESSEL STEELS PLATES All grades up to BS 1501-225 FORGINGS All grades up to BS 1503-224 PIPES LT50 quality of grade 410 in BS 3603:1977
Such steels and similar are used for the fabrication of LPG tankers and storage vessels. The 1% nickel max meets NACE MR0175 requirements for corrosion resistance in marine environments.
WELDING AMPERAGE AC and DC
OTHER DATA
Electrodes that have become damp should be re-dried at 150oC for 1 hour
APPROVED BY
LR – Grade 4Y H5
