Low Hydrogen

JACKSUN ULTRA 28

AWS A5.1: E7028

Heavy-coated, low hydrogen, iron-powder type electrode.
Provides very high deposition efficiency (≈ 160%) for faster welding.
Ideal for fillet and flat position welding on heavy structures, tanks, shipbuilding, and fabrication work.
Produces welds with excellent mechanical properties and low hydrogen content to resist cracking.
Operates only in flat and horizontal fillet positions.
Smooth arc, self-releasing slag, and uniform bead appearance.

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

C	Mn	Si	S	Ni	Cr	P	Mo	V
≤ 0.15	0.40-1.60	≤ 0.90	≤ 0.030	0.30	0.20	≤ 0.035	0.30	0.08

2. Typical Mechanical Properties of Weld Metal

Property	UTS (MPa)	Yield Strength (MPa)	Elongation (%)	Impact Toughness (J @ 0 °C)	Diffusible Hydrogen (ml/100 g)
Typical Values	520 – 580	430 – 500	24 – 30	50 – 80	5 – 8

3. Dimension, Current Condition & Packing Data (SMAW Welding)

Size (mm)	Size (inch)	Current Range (A)	Polarity	Voltage (V)	Packing (5 kg)	Packing (20 kg)
3.2	1/8	110 – 160	AC / DC+	22 – 24	✔	✔
4.0	5/32	150 – 210	AC / DC+	24 – 26	✔	✔
5.0	3/16	190 – 260	AC / DC+	26 – 28	✔	✔
6.0	1/4	230 – 320	AC / DC+	28 – 30	✔	✔

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