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Product Details:

AWS A5.5: E7018–A1 H4R | ISO 3580-A: E MoB 3 2 H5H4R Grade | Mo/Cr-Resistant Welds | Boiler & Pipe-Ready

A low hydrogen, moisture-resistant iron powder electrode designed for creep-resistant steels containing 0.5% Mo and 0.5–1.0% Cr. Suitable for high-integrity welding in boilers, pressure vessels, cement kilns, cast steels, and structural components operating at elevated temperatures (up to 525 °C). Delivers smooth arc behaviour, excellent weld bead appearance, and radiographic-quality joints across all positions.

Available Packs [Specs not verified]

• 2.50 mm x 350 mm – 2.5 kg vacuum pouch

• 3.15 mm x 450 mm – 5 kg box

• 4.00 mm x 450 mm – 5 kg box

• 5.00 mm x 450 mm – 5 kg box

• Master cartons up to 20 kg

• Custom packaging available upon request

Key Features

• Suitable for creep-resistant Mo and Cr-Mo steels up to 525 °C

• Radiographic-quality welds on cast steels, pressure vessels, and pipe spools

• H4R grade – excellent resistance to moisture absorption

• Excellent for boiler, kiln, and structural fabrication with thermal stress exposure

• Reliable performance on steels with ≤0.5% Mo and 0.5–1.0% Cr

• Can be used as-welded or stress-relieved at 620 °C for 1 hr

Industries

• Pressure Vessel & Boiler Fabrication

• Cement Kiln and Chemical Furnace Construction

• Cast Steel Machinery Frames

• Pipe Systems and Steam Lines

• Structural Welding of Creep-Resistant Steels

Processes

• Manual Metal Arc Welding (MMA / SMAW)

• Operates on both AC and DC+ polarity

• All-position welding (1G, 2F, 3G, 4G, 5G)

• Designed for welding of pressure components with Mo/Cr alloying

• Suitable for pipe welding, vessel shell joints, and heavy-wall castings

Additional Technical Notes

• Base materials include:
  • EN 10028-2: P235, P265, P295, P355, 16Mo3
  • EN 10216-1/2: P235, P275 | EN 10213-2: GP240R, G20Mo5
  • EN 10025: S235, S275, S355 | Ship steels A–E

• Re-drying: 300–350 °C for 1 hr if required

• Excellent impact strength at +20 °C (Charpy ≥ 100 J as-welded; ≥150 J stress-relieved)

• Good ductility after post-weld heat treatment

• Conforms to ISO 3580-A specifications for creep-resistant electrodes

Tags
E7018-A1, Mo steel welding, H4R creep-resistant electrode, boiler steel electrode, pressure vessel welding, cast steel SMAW, radiographic quality electrode, 16Mo3 welding, high-temperature structural welding, Cr-Mo stick rod

Typical Weld Metal Chemical Composition (%)

Typical Mechanical Properties As Welded (All Weld Metal)