AWS A5.15: ENi-CI

AWS A5.15: ENi-CI

Used for repair welding on thin cast iron pieces and machined surfaces, such as some key gray cast iron pieces like engine bearers, guide rails of machine tools, pinion stands, etc.

Characteristics and Applications:
ENi-Cl is a covered electrode with graphite type coating and pure Ni alloy core rod. The weld metalprovides excellent machining property, good tensile strength and good crack resistance and . lt is suitable forthe repair welding of high pressure parts and cast iron products, etc.. carbon decrement or even whitening ishardly happened in weld metal and satisfied performance can be obtained in light or median size workpiecewith fair content of phosphorus or weld stress.
Notes on usage:
1.Clean up the contaminations on the base metal and welding seam so as not to derogate the weld metalquality from crack and porosity.
2.Heat the welding portion to fully evaporate oil, liquor or solvent on it, normally the temperature is at around400~500℃.
3.Maintaining short arc length as possible is highly recommended.While welding with weave method, movingrange should be controlled within 3 times of the wire's dia.
4.Use intermittent weld and keep arc length short (not longer than 3") or the prolonged heating might causecrack on joint edge. Symmetrical intermittent weld should be applied to multi-layer welding so as to balancethe heat stress.
5.Pre-heating and slow cool-down is sometimes required, according to the metal's type, shape and size.6.To alleviate shrinking stress, proceed peening on and off at the temperature above 540℃ after welding toprevent crack or distortion.