Aluminum Alloy Welding Wire for Aerospace Projects

Specification

Applications and Solutions

• Aircraft Primary Structures: Welding structural members, bulkheads, and ribs where failure is catastrophic (often 2XXX,5XXX, or 7XXX base metals).

• Cryogenic Fuel Tanks: Fabrication of launch vehicle fuel tanks where extreme low-temperature toughness and leak-tightness are critical.

• Engine and Nacelle Components: Welding non-rotating parts subjected to high thermal and vibrational stress.

• Repair and Overhaul: Use in certified MRO facilities for the repair of damaged airframe components under strict OEM procedures.

FAQ

• Q: What is the main difference between AMS wire and standard AWS wire?A: AMS imposes significantly tighter chemical tolerances (especially on Fe and Cu), mandates higher cleanliness standards, and requires stricter process documentation and testing than AWS, which defines minimum chemistry.

• Q: Are all aerospace fillers the same?A: No. Different structures require different fillers: ER5183 for high-strength, tough structures; specialized Al-Li fillers for lightweight components; and ER4047 for brazing or high-flow casting repair.

• Q: Why is controlling trace elements so important in aerospace welding?A: Elements like Fe and Cu can form brittle intermetallic phases in the weld deposit, significantly reducing fracture toughness and fatigue life, which is unacceptable for flight-critical parts.