AK-TH550NQII
Standard:
TB/T 2374 ER55-G
Description: TH550NQ-II is a low-alloy weathering steel Ar-rich (80%Ar+20%CO2 ) gas shielded welding wire. Because the welding wire contains an appropriate amou-nt of alloy components such as Cu, Cr, and Ni, and the content of S and P is strictly controlled, the weld has Excellent atmospheric corrosion resistance, greatly improve the service life of the product and meet the needs of various specific climatic conditions, the weld metal has excellent mechanical properties and good crack resistance.
Application: For welding of Q450NQRI and equivalent grade weathering steel.
Typical Chemical Composition(%):
C:0.10 Mn:1.2-1.6 P:0.025 S:0.020 Si:0.60 Cu: 0.20-0.50 Ni: 0.20-0.60 Cr：0.30-0.90
Typical Mechanical Properties(%):
Test Item Tensile strength (MPa) Yield Stress (MPa) Elongation (%) Impact values (J)
Standard ≥550 ≥450 ≥22 ≥60J/-40℃
Typical Value 608 510 26 88
