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Hardfacing Electrodes

SMA

SMA is a basic coated electrode operating on AC/DC(+) producing a tough austenitic manganese steel weld metal. The deposit work hardens in service and has excellent resistance to wear by impact. Typical applications include surfacing of parts subjected to abrasion and heavy impact as in the case of crusher jaws, bucket teeth and lips, rail crossing, etc.

Precaution

1. Ensure the electrodes are dry. Re-dry the electrodes at 250-300°C for one hour.

2. While welding of austenitic manganese steel, restrict the heat input by :

a) Short arc;

b) Stringer bead;

c) Deposit in short length;

d) Intermittent welding;

e) Keeping the base material partly immersed in water.

CHEMICAL COMPOSITION OF ALL WELD METAL (%)


Element
CMnSi 

Cr 

Percent
0.8514.50.553.0


CURRENT AND PACKING DATA: AC / DC(+)


Size (mm)
6.3x450
5x450
4x450
3.15x350
Current Range (Amps)
200-270
160-200
130-160
90-120
Weight / Carton (kgs)
20
3555
75