Welding Process; Steel - Steel Welding; Steel With Stainless Steel Or Stainless Steel With Stainless Steel Welding - PREVOST H3-41 Maintenance Manual

SECTION 00 : GENERAL INFORMATION

5. WELDING PROCESS

5.1 STEEL – STEEL WELDING
CAUTION
Before welding, perform multiplex modules disconnection procedure.
NOTE
Welding surfaces must be free of scale, slag, rust, paint, grease, humidity or other foreign material that
would render welding impossible.
DANGER
Only a qualified and experienced person must do welding.
FCAW (Flux Cored Arc Welding) process ;
o
Electrode wire conforms to A5.20 AWS (American Welding Society) specifications ;
o
E4801T-9-CH, type electrode wire with 0,045" diameter (1,14 mm) ;
o
Material Thickness
1/8" to ½"
If necessary and with great care to prevent perforating the material, it is possible to use a conventional
electric arc welding machine according to the following specifications:
SMAW (Shielded Metal-Arc Welding) process ;
o
Welding rod conforms to A5.1 of AWS (American Welding Society) specifications; E 7018 type
o
welding rod with 1/8" diameter (3,2 mm).
Current: 100 amperes to 150 amperes; optimum at 120 amps.
o
It is important to grind weld bead starts and stops and also to grind arc strikes from surfaces.

5.2 STEEL WITH STAINLESS STEEL OR STAINLESS STEEL WITH STAINLESS STEEL WELDING

CAUTION
Before welding, perform multiplex modules disconnection procedure.
NOTE
Welding surfaces must be free of scale, slag, rust, paint, grease, humidity or other foreign material that
would render welding impossible.
DANGER
Only a qualified and experienced person must do welding.
GMAW (Gas Metal-Arc Welding) process;
o
Welding wire conforms to AWS (American Welding Standards) A5.9 specifications;
o
308LSi type welding wire with 0.035" diameter (0,9 mm);
o
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PA1621 Maintenance Manual All Series | Section 00 revised Sept 2019
Voltage Current
26 ± 2 volts 260 Amps
Wire Feed Rate
450 ipm approx.
Shielding Gas
75% argon – 25%
CO2 or 100% CO2