Submerged Arc Welding

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Submerged Arc Welding
Submerged Arc Welding
SAW Flux / Filler Metal
Compositions
F7A2-EM12K
• F indicates flux
– 70-95 ksi UTS, 58 ksi minimum yield strength, 22%
elongation
– A - as welded; P - postweld heat treated
– 2 - minimum impact properties of 20 ft-lbs @ 20°F
• E indicates electrode (EC - composite electrode)
– M - medium manganese per AWS Specifications
– 12 - 0.12% nominal carbon content in electrode
– K - produced from a heat of aluminum killed steel
Submerged Arc Welding
Advantages
•
•
•
•
High deposition rates
No arc flash or glare
Minimal smoke and fumes
Flux and wire added
separately - extra dimension
of control
• Easily automated
• Joints can be prepared with
narrow grooves
• Can be used to weld carbon
steels, low alloy steels,
stainless steels, chromiummolybdenum steels, nickel
base alloys
Submerged Arc Welding
Limitations
• Flux obstructs view of
joint during welding
• Flux is subject to
contamination porosity
• Normally not suitable for
thin material
• Restricted to the flat
position for grooves - flat
and horizontal for fillets
• Slag removal required
• Flux handling equipment
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