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Copper Coated

JACKSUN MIG 70S3

AWS/ASME: A5.18 ER70S-3

JACKSUN MIG 70S3 is a copper-coated solid wire for MIG/MAG and TIG welding of mild and low alloy steels.

  • Designed for general-purpose welding of clean, uncoated steels.
  • Offers good bead appearance, stable arc, and minimal spatter.
  • Balanced levels of deoxidizers (mainly Mn & Si), suitable for welding steels with light mill scale.
  • Suitable for structural steel, automotive parts, piping, and general fabrication.
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Technical Data

Product Specifications

1. Typical Chemical Composition

CMnSiSPCrNiMo
0.06 – 0.140.90 – 1.400.45 – 0.75≤ 0.035≤ 0.025≤0.15≤0.15≤0.15

2. Typical Mechanical Properties

PropertyUTS (MPa)Yield Strength (MPa)Elongation (%)Impact Toughness (J @ -20 °C)
Requirement (AWS A5.18 ER70S-3)≥ 480≥ 400≥ 22≥ 27
Typical Values500 – 560420 – 46025 – 3040 – 60

3. Recommended Welding Parameters — AWS A5.18 ER70S-3

Welding PositionCurrent (A)Voltage (V)Shielding GasGas Flow (L/min)
Flat / Horizontal150 – 32022 – 32CO₂ / Ar+CO₂ (75/25)12 – 20
Vertical / Overhead100 – 22020 – 28CO₂ / Ar+CO₂ (75/25)12 – 18
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