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Weld Star FN 55 (E NiFe-Cl) MIG Welding Wire 1.2mm 15kg Spool

£740.00 ex VAT

Further Reductions Available On Request 01276 505012

  • Cast Iron Welding
  • Excellent Corrosion Resistance
  • 1.2mm 15kg



AWS A5.15 – E NiFe-CI

A 15KG spool of Weld Star FN 55 (E NiFe-Cl) MIG Welding Wire 1.2mm. Designed specifically for welding cast iron and ductile iron. Suited to a range of joint requirements for dissimilar materials such as cast iron, mild steel, low alloy and stainless steels.  This filler wire is precision wound and layered for superior wire feeding characteristics and is available in a diameter of 1.2mm.

The main applications include repairing and fabricating e.g. rebuilding shafts, wheels, and critical joints between steel and cast iron.  As a result of the high Nickel (Ni) content in FN 55 MIG filler wire, it has excellent resistance to the effects of corrosion. Additionally, Nickel (Ni) also ensures good levels of ductility allowing the solid weld material to bend and misshape without the risk of cracking or completely failing.

This welding wire is mainly recommended for welding high sulphur, phosphorous or lubricant contaminated castings.  Typical base materials for welding include grey cast iron, malleable (cast as a white iron) and nodular cast iron often referred to as ductile iron.

Features & Benefits
  • Ideal for joining cast iron with dissimilar materials
  • Excellent Ductility
  • Good levels of corrosion resistance
  • Precision wound and layered for superior wire feeding
  • Suitable for welding casting with high levels of sulphur and phosphorus
  • Excellent heat resistance
  • Repair / Fabrication
  • Shaft Rebuilds
  • Ideal for use in Robotic and Automated Processes
  • Joining iron castings
What is Ductile Iron?

Often referred to as nodular or spheroidal iron. This group of irons have high levels of strength.  As the name suggests ductile irons exhibit excellent flexibility, elasticity and durability, due to their specific microstructure.

Owing to the addition of Carbon (usually around 3%) this material can be bent, twisted, or misshaped without cracking or fracturing.  It also has superior mechanical properties in comparison to other types of cast iron. Notably ductile iron has properties more similar to steel.

Because of its amazing flexibility, it is used in a wide range of applications including automotive components, pump housings, and machine frames specifically for the wind power industry.

Ferritescope - Measures a Materials Ferrite Content

What is the Ferrite Number (FN)?

This number indicates the amount of ferrite present in a metal’s chemical composition. The given number will be similar to the actual volume percentage content of ferrite and range between 0 and 7.  The number is obtained by using a Ferritescope (pictured right).

Welding Positions

EN ISO 6947 – PA, PB, PC, PD, PE, PF



Chemical Composition
C% Mn% Si% P% S%
max max max max max
2.00 0.80 0.20 0.03 0.03
Fe% Ni% Cu% Al%
rem. 54.00 max max
56.00 2.50 1.00
Mechanical Properties
Tensile Strength 400 – 579 MPa
Yield Strength
Impact Strength


Mechanical properties are approximate and may vary based on the heat, shielding gas, welding parameters and other factors.

Shielding Gases

EN ISO 14175 – I1, Ar + 1-2% O2

Typical Base Materials

Grey cast iron, malleable, nodular*
* Illustrative, not exhaustive list

In Conclusion

As shown above Weld Star FN 55 (E NiFe-Cl) Welding Wire is the ideal choice for cast iron welding requirements.  In addition, this filler wire can also be used for welding cast iron to dissimilar metals such as mild steel, low alloy or stainless steel.

FN 55 exhibits excellent mechanical properties, with particular reference to its heat and corrosion resistance.  Due to the high levels of Nickel(Ni) in this filler wire, it has excellent ductile properties which allow the material to bend and misshape with significantly less risk of fracturing.  The wire is precision wound and layered to ensure superior feeding characteristics.

Please note that these 15kg spools will not fit all of our MIG welders.  If in doubt, please call and one of our team will happily advise.

Wire images are for illustration only.


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