Low Hydrogen

JACKSUN 18 H4R

AWS A5.1: E7018 H4REN ISO 2560-A: E 42 4 B 32 H5EN ISO 2560-B: E4918 H4R

Basic coated, low hydrogen electrode with enhanced moisture resistance (H4R).
Provides superior mechanical properties with diffusible hydrogen ≤ 4 ml/100 g weld metal.
Designed for structural steel, bridges, pipelines, boilers, and pressure vessels where hydrogen cracking resistance is critical.
R suffix (Resistant): Special coating technology ensures extended shelf life without moisture pick-up (meets AWS H4R).
Smooth arc, easy slag removal, fine weld bead.
Suitable for all-position welding except vertical down.

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

C	Mn	Si	S	Ni	Cr	P	Mo	V
≤ 0.15	0.40-1.60	≤ 0.75	≤ 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 @ -40 °C)	Diffusible Hydrogen (ml/100 g)
Typical Values	520 – 590	440 – 520	25 – 32	60 – 90	2 – 4

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

Size (mm)	Size (inch)	Current Range (A)	Polarity	Voltage (V)	Packing (5 kg)	Packing (20 kg)
2.5	3/32	70 – 100	AC / DC+	20 – 22	✔	✔
3.2	1/8	100 – 140	AC / DC+	22 – 24	✔	✔
4.0	5/32	130 – 180	AC / DC+	24 – 26	✔	✔
5.0	3/16	170 – 240	AC / DC+	26 – 28	✔	✔

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