TIG Wire for High Tensile Steel

It is suitable for carbon steel and 490MPa high tensile steel, it can be welded in all positions.
Classifications:
AWS A5.18 ER70S-2
A5.18M ER48S-2
EN G 2Ti
ISO 636 B-W49A3 W2
Characteristics and Applications:
Adding Al,Ti,Zr, it has good WPS, stable mechanical property, good low temperature impact toughness, nice weld bead. It is applicable in backing welding of pipe, pressure vessel, petrochemistry.
Typical Chemical Composition of Weld Metal:
Alloy wt%
C
Mn
Si
Cr
Ni
Mo
P
S
Ti
Zr
Al
Cu
AWS
0.07
0.90-1.40
0.40-0.70
0.15
0.15
0.15
0.025
0.035
0.05-0.15
0.02-0.12
0.05-0.15
0.50
EXP
0.043
1.22
0.58
0.08
0.09
0.07
0.013
0.009
0.10
0.06
0.08
0.15
Typical Mechanical Properties of Weld Metal
:
Mechanical property
Yield Strength( MPa)
Tensile Strength( MPa)
Elongation( %)
Impact Value (J/°C)
AWS
400
480
22
27/-30
EXP
475
555
32
153/-30
Notes on Usage:
Polarity: AC or DC-.
Shielding gas: Pure argon, the purity should be above 99.99%.
Gas flow: Current :100-200A,flow:7-12L/min. 200-300A, gas flow: 12-15L/min.
Rust layer, moisture, oil stain, dust of the welding part should be surely cleaned up.
Under the circumstance of outdoor welding, if the wind speed is more than 1.5m/s, wind resistant actions should be taken, wind resistant facility is necessary to prevent porosity.
The above suggestion is for reference, during concrete operation, please be accurate with site situation. If necessary, WPS should be firstly performed and then welding plan should be confirmed.