STEELOMATIC – 309 MO 15
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CLASSIFICATION IDENTIFICATION: Name Printed

 

AWS : 5.4
E – 309 Mo – 15

DESCRIPTION AND APPLICATIONS:

STEELOMATIC – 309 Mo-15 is a basic type all position electrode depositing 25Cr-12Ni-2.5Mo weld metal. It has pleasing operating characteristics. Radiographic Quality weld metal posses excellent mechanical properties and oxidation resistance up to 1100° C.

Ideal for welding wrought and cast stainless steel of similar composition. For overlay application to resist from heat and corrosion. For joining dissimilar steels such as 18-11-Mo steel to mild steel, clad side welding of 18-11-Mo steels etc. Suitable for welding of turbine, runner blades of ferritic chromium stainless steel.


TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL (%)

C Mn Si Cr Ni Mo S P
0.060 1.8 0.50 23.5 13.0 2.40 0.015 0.030

TYPICAL MECHANICAL PROPERTIES OF ALL WELD METAL

UTS Kg/mm2 Elongation (L = 4d) %
61.0 35.0


WELDING CURRENT AND PACKING DATA: AC/DC (+)

SIZE D X L (mm) 2.5 x 350 3.15 x 350 4.0 x 350 5.0 x 350
CURRENT (AMPS) 50-80 80-100 110-140 150-180
PIECES / CARTON 80 60 40 30



PRECAUTIONS:

  • Use dry electrodes. Electrodes slightly affected by moisture should be carefully dried at temp 250°-300°C for 1 hour before use.
  • Maintain short arc and employ welding currents within the range recommended. Welding with excessive current results in increased spatter, undercut and uneven slag covering. Furthermore It adversely effects the quality at weld metal
  • Remove oil, grease, dust and rust from parent metal.