Eagle 545FGS Build-Up Wire | 40–45 HRC Machinable Flux Core

Eagle 545FGS is recommended for:

Worn shafts and rollers
Pins and bushings
Sprockets
Idlers
Rail and guide surfaces
Metal-to-metal wear areas
Heavy equipment rebuilds
Build-up beneath final hardfacing deposits

Suitable for build-up and underlay on low, medium and high-carbon steels.

DC Reverse [+] Polarity

Clean the weld area thoroughly and remove fatigued or damaged metal before rebuilding. Use grinding where practical, or Eagle 188 airless gouging electrodes where additional material removal is required.

Use the lowest effective amperage while maintaining approximately 1/2"–5/8" stick-out. Apply either stringer beads or weave beads depending on the application and required build-up.

Eagle 545FGS is an all-position build-up wire with a martensitic structure and stable hardness provided by carbide-forming alloy elements.

With a deposited hardness of approximately 40–45 HRC, it provides a stronger, harder build-up layer than softer machinable alloys while remaining suitable for applications involving metal-to-metal wear.

Why Eagle 545FGS?

Higher-hardness build-up — 40–45 HRC provides greater resistance to metal-to-metal wear.

Martensitic deposit — stable hardness helps maintain dependable performance in demanding service.

Machinable rebuild alloy — useful where worn parts need to be restored and then machined back to size.

Excellent underlay — provides a durable foundation before applying harder final hardfacing layers.

545FGS or 530FGS?

Choose 530FGS when you want a softer, more machinable build-up deposit around 28–32 HRC.

Choose 545FGS when you want a harder build-up layer around 40–45 HRC for more demanding metal-to-metal wear.
In simple terms:

530FGS = softer machinable build-up
545FGS = harder machinable build-up for greater wear resistance

.045" / 1.2 mm
20–26 V
150–250 A

1/16" / 1.6 mm
22–27 V
240–340 A

Gas Flow: 35–45 CFH
Shielding Gas: 75/25 Ar/CO₂ or 100% CO₂