Eagle 878 High-Strength Repair Welding Rod | Hard-to-Weld Steel Electrode

Eagle 878 is recommended for:

Frog points
Machinery parts
Hot dies
Manganese bucket lips
Bucket teeth to bucket shells
Shaft build-up
Pipeline ditcher segments
Joining wear plate to carbon steel
Difficult alloy steel repairs
High-stress maintenance work

Designed for applications where strength, ductility and crack resistance are critical.

AC or DC Reverse [+] Polarity

Clean the weld area thoroughly and remove fatigued or damaged metal before welding. Where required, groove out cracks and defects before repair; Eagle 188 airless gouging electrodes are an excellent option for weld preparation.

Maintain a short arc length and use stringer beads for best control and dependable mechanical properties.

Eagle 878 is a high-strength repair electrode with a moisture-resistant coating designed to produce sound, porosity-resistant weld deposits.

Its combination of approximately 105,000 psi tensile strength and 32% elongation provides both high strength and excellent ductility, making it especially valuable for difficult repair applications where cracking is a concern. The slag is self-removing, and the electrode can be welded in all positions.

Why Eagle 878?

High-strength repair performance — approximately 105,000 psi tensile strength for demanding industrial repairs.

Excellent ductility — approximately 32% elongation helps the weld tolerate impact, vibration and movement.

Built for difficult steels — ideal for manganese, wear plate, alloy steels and hard-to-weld components.

Moisture-resistant coating — helps produce consistent, porosity-resistant weld deposits.

878 or 807?

Choose Eagle 878 when you want a high-strength, highly ductile repair electrode for hard-to-weld steels, especially when porosity resistance and all-position capability are important.

Choose Eagle 807 when you need a tough cushion layer beneath hardfacing or a repair alloy specifically focused on manganese and dissimilar alloy-steel joining.

In simple terms:
878 = high-strength repair for difficult steels
807 = tough repair + hardfacing cushion layer

3/32" / 2.50 mm — 30–80 A
1/8" / 3.25 mm — 60–110 A
5/32" / 4.00 mm — 110–150 A