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Submerged Arc WeldingSubmerged 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
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, chromium-molybdenum steels, nickel base alloys
Submerged Arc Welding
Limitations• Flux obstructs view of
joint during welding• Flux is subject to
contaminationporosity• Normally not suitable for
thin material• Restricted to the flat
position for grooves - flat and horizontal for fillets
• Slag removal required• Flux handling equipment
Submerged Arc Welding