Combination of FCAW

[C Padmanaban]

Dear Team .

Can you suggest suitable MIG welding wire /FCAW wire for welding following combination.

EN19 +E19

EN19+MS

[sridhar cn]

You have not mentioned the thicknesses and application for the job. However based on general requirements the following 

filler wires are recommended.

  1. For joining EN19 to EN19 (UTS ≥ 850 MPa) you can use E100T5-K3  for critical welds and for good strength and toughness. 

      Pre-heating at 150–250°C to avoid cracks during welding and an interpass temp. of 250 deg.C is recommended. 

     Alternatively, you can use E110T5-K4M for critical and if high strength is required. PWHT at 600–650°C for 1–2 hours (depending 

     upon the thickness) for EN19 is optional.

  2. For joining EN19 to MS you can use E71T1-1C/M for dissimilar joints; tough and ductile materials.

      Pre-heating to EN19 at 150–200°C to avoid cracks during welding and an interpass temp. of 200 deg.C is recommended.

      Alternatively, you can use E81T1-Ni1M/C  for critical welds to balance strength and toughness.

You can use 100% for a CO₂ deeper penetration or 80Ar + 20% CO₂ for a spatter free and better arc stability. For a higher                   

thickness use multi-pass technique and avoid sharp notches and high restraint joints. Avoid high hardenability wires unless 

post-weld heat treatment (PWHT) is applied, or cracking risk increases.

C Sridhar.

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