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JACKSUN 18 H4R product image
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.
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Technical Data

Product Specifications

1. Typical Chemical Composition

CMnSiSNiCrPMoV
≤ 0.150.40-1.60≤ 0.75≤ 0.0300.300.20≤ 0.0350.300.08

2. Typical Mechanical Properties

PropertyUTS (MPa)Yield Strength (MPa)Elongation (%)Impact Toughness (J @ -40 °C)Diffusible Hydrogen (ml/100 g)
Requirement≥ 490≥ 400≥ 22≥ 27≤ 4 (H4R)
Typical Values520 – 590440 – 52025 – 3260 – 902 – 4

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

Size (mm)Size (inch)Current Range (A)PolarityVoltage (V)Packing (5 kg)Packing (20 kg)
2.53/3270 – 100AC / DC+20 – 22✔✔
3.21/8100 – 140AC / DC+22 – 24✔✔
4.05/32130 – 180AC / DC+24 – 26✔✔
5.03/16170 – 240AC / DC+26 – 28✔✔
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