THY-558Ni2 (E81T8-Ni2-J)

THY-558Ni2 (E81T8-Ni2-J) is a low-alloy steel self-shielded flux-cored wire. Suitable for all-position welding, particularly vertical-down progression, it offers exceptional low-temperature impact toughness without requiring external shielding gas.

Features

• Self-shielded (innershield) flux-cored design requiring no external shielding gas
• Exceptional all-position capability, specifically optimized for high-speed vertical-down welding
• Superior low-temperature impact toughness at -40°C ("J" classification) enhanced by ~2% Nickel content
• High tensile strength (80 ksi / 550 MPa class) with excellent crack and defect resistance
• Fast-freezing slag with easy removal, producing clean and uniform weld beads
  

Typical Applications

• Cross-country oil and gas pipeline construction and field joint welding
• Offshore platforms, marine engineering, and shipbuilding structures
• Heavy structural steel erection, bridge construction, and field repairs
• Low-temperature pressure vessels and high-yield piping systems
• Joining high-strength low-alloy and nickel-bearing steels under demanding outdoor conditions
  

Welding Positions

• PA / PB / PC / PD / PE / PF
  

WARNING

• Use DC⁻ only.

• Wire extension should be maintained at 20 mm.