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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