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.

1. Typical Chemical Composition of Weld Metal (% by weight)

0.06 – 0.14

0.90 – 1.40

0.45 – 0.75

≤ 0.035

≤ 0.025

≤0.15

2. Typical Mechanical Properties of Weld Metal

Property	UTS (MPa)	Yield Strength (MPa)	Elongation (%)	Impact Toughness (J @ -20 °C)
Typical Values	500 – 560	420 – 460	25 – 30	40 – 60

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

Welding Position	Current (A)	Voltage (V)	Shielding Gas	Gas Flow (L/min)
Flat / Horizontal	150 – 320	22 – 32	CO₂ / Ar+CO₂ (75/25)	12 – 20
Vertical / Overhead	100 – 220	20 – 28	CO₂ / Ar+CO₂ (75/25)	12 – 18

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