TB TH550-NQ-II Welding Wire
  • TB TH550-NQ-II Welding Wire
TB TH550-NQ-II Welding Wire

TB TH550-NQ-II Welding Wire

Specification:T BTH550-NQ-II
Shieding Gas:80%Ar+20%CO2
Product Description

TB TH550-NQ-II - Characteristics

( 1 ) The product is 550MPa weathering resistant steel welding wire.

( 2 ) The molten metal contains Cu,Ni and Cr,weathering resistant is well.

( 3 ) It’s used to weld 550MPa weathering resistant steel,such as bridges, buildings, vehicles, etc.

TB TH550-NQ-II - Precaution

( 1 ) Adequately clear the oil,rust,moisture,dust and other debris of the welded parts.

( 2 ) It’s used to weld Thick plate welding (25 mm above) or large binding place, preheat in 90~120℃ before welding.

One chemical composition of the weld metal sample (wt%)


One mechanical properties of the weld metal sample

Tensild Strength
Yield Strength
Impact Value

The specifications of the product and welding condition (DC+):

Dia (mm)
Welding Condition
Short Circuiting TransferCurrent A80 ~ 160100 ~ 210--
Voltage V16 ~ 2217 ~ 22--
Spray TransferCurrent A180 ~ 280200 ~ 300210 ~ 320220 ~ 330
Voltage V24 ~ 3024 ~ 3024 ~ 3224 ~ 32

TB TH550-NQ-II Non-Copper Coated Welding Wire - Manufacturer

Hebei XINYU Welding Co., Ltd, mainly produces high-strength steel welding wire, Non-copper-coated solid wire,  submerged arc & stainless steel welding wire. Our products are widely applied to the welding of low-alloy high tensile large & key steel structures in coal machinery, construction machinery, petrochemical machinery, pressure vessels or tanks, oil & gas pipelines, military industry, shipbuilding, bridge, and high-rise buildings, etc. At the same time, we are the only enterprise in the domestic which produces welding wire as well as welding wire equipment.

Our Welding wires and welding wire equipment are exported to the USA, Italy, Brazil, Russia, and India, etc. Welcome you to our factory any time. Please leave contact information, our professional staff will contact you the first time!