|3.15 mm, 2.5 mm
|Mild Steel, Cast Iron
|Product Name / Specification
|Useful Welding Technique
|Principal App. Areas
An Electrode for All Weldable Cast Irons.
|Weldalloy 521 is an ideal electrode for welding all weldable cast irons. It is also useful on casting with relatively high phosphorous. The electrode welds with a mooth, stable arc giving a flat, dense and crack free deposit. This electrode yields a bond strength more than that of Weldalloy 511 and Weldalloy 531.
|The surfaces to be welded should be free from grease, oil dirt and paint. Avoid localised heat input by operating at lowest possible current, stringer beads and skip weld technique. Maintain
low interpass temperature.
|Tensile Strength : 35-40 Kgf/mm2
Hardness : 180-210 BHN
|The superior bond strength and crack resistance makes the electrode useful for heavy work pieces or where higher stresses occur like machine frames, lathe beds, cast iron dies, valve bodies, foundry defects, pump casing, differential housing etc. It is also used for joining of ferritic and pearlitic high strength irons such as malleable mechanite and ductile irons and also for welding these types to steel.