Special heavy coated electrode for welding and surfacing of austenitic manganese steels.
LoTherme-457S is easily weldable with stable arc, homogeneous, finely rippled bead appearance and gives good slag removal. The fully austenitic weld metal is resistant to rust and scale up to 850 C, work hardening.
LoTherme-457S is suited for particularly tough, crack resistant joints and surfacing on steels of higher tensile strength, hard-manganese steel and mixed combinations including heterogeneous joints. Suitable for surfacing on parts subjected to impact, pressure and rolling wear, such as rails curved rails, switches, rolls, etc. an for tough buffer layers under hard alloys. A main application field is for repair and maintenance in the construction industry.
ULTIMATE TENSILE STRENGTH : 66 kgf/mm2
HARDNESS AS WELDED : 200 BHN
WORK HARDENED : Up to 350 BHN
Clean welding area thoroughly. Pre-heating of thick-walled ferritic part to 150-250 C. Hold electrode vertically with a short arc. Re-dry electrodes that have got damp at 250-300 C for 2 hours.
|Current Range (Amps)||160-200||120-160||90-120||70-90|