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ER70S-7 Welding Wire (CHW-50C)

ER70S-7 welding wire is used for single-pass or multi-pass welding structures fabricated by 500MPa grade tensile strength mild steels or low alloy steels, such as vehicles, bridges, skyscrapers, machineries and so on. Its weld metal has good performance of resistance to blowhole and crack.

Welding Position: F, H, HF, OH, V

Type of Current: DCEP

Notice:

  • To avoid rust the wire must be kept in dry condition and keep the package in good condition also before welding.
  • The surfaces to be welded must be cleaned away impurities of oil contamination, rust, moisture and so on.
  • Mechanical properties, crack resistance and compactness of the weld metal are affected by heat input in welding so should pay more attention to it.
  • The welding conditions mentioned above for reference only and it is better to do a welding procedure qualification according to project before put it into formal welding.

ER70S-7 Chemical Composition of Deposited Metal (%)

 CMnSiSPCrNiMoCuOther
Typical0.081.970.720.0190.0200.0200.021--0.20≤0.5

Mechanical Properties of Deposited Metal (AW)

 Tensile Strength Rm (MPa)Yield Strength ReL (MPa)Elongation A4 (%)Shield Gas
Typical54542530CO₂
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