StarBlaze Prime 7018–A1 H4R

AWS A5.5: E7018–A1 H4R | ISO 3580-A: E MoB 3 2 H5

H4R 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:

Dimensions:2.50 mm x 350 mm, 3.15 mm x 450 mm, 4.00 mm x 450 mm, 5.00 mm x 450 mm

Pack Sizes: 2.5 Kg Pouch, 5 Kg Box

Master Box: 20 Kg, Customisable packaging available on request

Description
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Description

Typical Weld Metal Chemical Composition (%)

C	Si	Mn	Mo	P	S
0.07	0.40	0.80	0.50	0.020	0.016

Typical Mechanical Properties As Welded (All Weld Metal)

Yield Strength

Rp (N/mm2)

Tensile Strength

Rm (N/mm2)

Elongation

A5 (%)

Charpy Impact Value

ISO-V J +20°C

≥ 420

550-650

100

Typical Mechanical Properties Stress Relieved (620°± 15° for 1hr.)

Yield Strength

Rp (N/mm2)

Tensile Strength

Rm (N/mm2)

Elongation

A5 (%)

Charpy Impact Value

ISO-V J +20°C

≥ 420

520-620

150

Recommended Welding Parameters

Diameter (mm)	Amperage Range (A)
2.50	60-90
3.15	100-140
4.00	140-180
5.00	180-230

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- Dimensions: 2.50 mm x 350 mm, 3.15 mm x 450 mm ,4.00 mm x 450 mm
  
  Pack Sizes: 2.5 Kg Pouch, 5 Kg Box
  
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- Dimensions: 2.50 mm x 350 mm, 3.15 mm x 450 mm ,4.00 mm x 450 mm
  
  Pack Sizes: 2.5 Kg Pouch, 5 Kg Box
  
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- Dimensions: 2.50 mm x 350 mm, 3.15 mm x 450 mm ,4.00 mm x 450 mm
  
  Pack Sizes: 2.5 Kg Pouch, 5 Kg Box
  
  Master Box: 20 Kg, 30 Kg, 40 Kg, Customisable packaging available on request
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A rutile-basic coated stainless steel electrode, E308L-16 is designed for welding austenitic 18/8 Cr-Ni stainless steels. With a low carbon core wire (308LER) and optimized ferrite (~8%), it offers maximum crack resistance, smooth arc characteristics, and superior corrosion resistance. The electrode produces soft fusion with minimal spatter, excellent slag detachability, and aesthetically clean weld beads. Suitable for use at service temperatures from -120°C to +350°C.

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StarBlaze Prime 7018–A1 H4R

Description

Reviews

Welding Products

StarBlaze Prime 6010

StarBlaze Prime 307

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StarBlaze SS 308L