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AWS A5.18 ER70S-6 Mild Steel Welding Wire

Material: Copper coated mild steel wire
AWS Specification: ER70S-6
Diameter: Φ1.0~1.6mm
Length: 300-500mm
Application: Used to weld shipbuilding steel(A , B, D, E, A36, D36, E36)and equivalent mild steel or 550Mpa grade mild alloy steel

AWS A5.18 ER70S-6 Mild Steel Welding Wire

AWS A5.18 ER70S-6 Mild Steel Welding Wire Application

ER70S-6 contains high levels of manganese and silicon for stronger deoxidizing power where stringent cleaning procedures are not possible. This wire has been designed to provide X-ray quality porosity-free welds and the highest tensile strength (as welded) of the plain carbon steel wires. The high silicon content increases the fluidity of the weld pool, creating a smoother bead appearance and resulting in minimal post-weld grinding. ER70S-6 is excellent where poor fit-ups or rusty and oily plates may be used.

Type ER70S-6 is a wire with higher levels of Deoxidizers welding of steels with moderate amounts of scale or rust. (Mn & Si) compared to other carbon steel wires. This wire is suitable for welding of steels with moderate amounts of scale or rust.

For Mig welding use Carbon Dioxide or Argon + Co2 or Argon + 2% Oxygen as shielding gases.

AWS A5.18 ER70S-6 Mild Steel Welding Wire Typical Chemical Composition

Weight% C Mn Si P S Ni Cr Mo V Cu
ER 70S-6 0.06-0.15 1.40-1.85 0.80- 1.15 0.025 max 0.035 max 0.15 max 0.15 max 0.15 max 0.03 max 0.50 max

Mechanical Properties

Ultimate Tensile Strength Offset Yield Strength 0.2 % Elongation (%)
psi MPa psi Mpa
79,750 550 65,250 450 30

AWS A5.18 ER70S-6 Mild Steel Welding Wire Typical Welding Parameters

Wire Diameter Volts Amps
Short Arc Welding 0.03 16 – 18 75 – 125
Short Arc Welding 0.035 15 – 18 100 – 160
Short Arc Welding 0.045 17 – 18 100 – 120
Spray Arc Welding 0.03 26 – 28 200
Spray Arc Welding 0.035 27 – 29 250
Spray Arc Welding 0.045 28 – 31 265
Spray Arc Welding 0.052 29 – 31 300 – 340
Spray Arc Welding 1/16 30 – 36 350 – 400

Please note that the above specifications are “general specifications” that pertain to the majority of our production. These specifications should only be used for general, informational purposes. All dimensions and specifications are nominal and are subject to normal manufacturing tolerances. All specifications are subject to change without prior notice. All pictures shown are for illustration purposes only. Actual product may vary.

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