TIG Rods LKT-56


LKT-56 is designed for welding of mild steel and 490N/mm2 grade steel. Commonly used is butt or fillet welding. As an all-position welding rod for TIG welding, it is especially suitable for the root pass of pipe welding.


It is suitable for welding of high pressure piping for shipbuilding, petro chemistry and nuclear power plant, etc.

Notes on Usage:

  1. 100% Argon shielding gas with 99.997% high purity is recommended and the flow rate must be properly controlled. The flow rate is recommended 7-12l/min when arc current is 100-200 Amp and it goes up to 12-15 Lit/min when arc current rises to 200-300 Amp.
  2. Select right gas cup size and employ proper stick out of tungsten electrode.
  3. To obtain a very clean weld pool, keep the weld plate free from dirt, rust, paint and any other atmospheric contamination.
  4. Trailer Shield is required to ensure the weld pool completely shielded until solidification is complete and no porosity problem.


AWS A5.18 ER70S-6

JIS Z3316 YGT50

Typical chemical composition of weld metal (wt%)

C Mn Si P S Ni Cr Mo V Cu
0.08 1.53 0.80 0.015 0.011 0.008 0.022 0.021 0.006 0.044

Typical mechanical properties of weld metal

YP N/mm2 TS N/mm2 EL % IV -30 ºC J
460 550 35 196

Sizes, Length and Weight per pack.

Diameter (mm) 1.6 2.0 2.4
Length (mm) 915 915 915
Weight per pack (kg) 5 5 5
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