BASIC LOW HYDROGEN ELECTRODE FOR WELDING 9Cr-1Mo STEELS OPERATING UP TO 600ºC
RD-16B8
CLASSIFICATION
AWS A5.5 E8016-B8 | EN ISO 3580-A E CrMo9 B | JIS Z 3223 DT 2616
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 but minimal iron powder, is extruded onto a high purity ferritic core wire and bound with a blend of silicates that ensure both coating strength and a coating resistant to subsequent moisture absorption.
WELDING FEATURES OF THE ELECTRODE
The chemical nature of the flux together with its controlled coating factor allows the electrode to be used at relatively low amps. This factor together with the fairly fluid but quick freezing slag facilitate vertical up welding including controlled penetration root runs. Overall the arc is very stable, slag detachability is good, fillet welds are slightly convex and metal recovery is some 98% with respect to weight of the core wire.
APPLICATIONS AND MATERIALS TO BE WELDED
PLATE ASTM A387 Grade 9, TUBES/PIPES ASTM A335 Grade 9, A234 Grade WP9, A199 Grade T9, A213 Grade T9. BS 3604 Grades CFS & HFS 629-470 CFS/HFS 629-590. FORGINGS A182 Grade F9, A336 Grade F9 CAST ASTM A217 Grade C12, BS1504 Grade 629 and BS3100 Grade B6 PWHT recommended range is 725 – 755 ºC and pre-heat 200-250ºC. Cool to 150ºC before PWHT
WELDING AMPERAGE AC and DC
OTHER DATA
Electrodes that have become damp should be re-dried at 150oC for 1 hour
