HC470-125-05 - Techniweld HF 470 Hardfacing Stick Electrodes 1/8" (5lb Pack)

Severe Abrasion Resistance for Industrial MRO

The Techniweld HF 470 (HC 470) is a premium hardfacing stick electrode engineered specifically for applications subjected to severe sliding abrasion and moderate impact. Formulated with a high-chromium carbide alloy composition, this electrode deposits a weld metal that is extremely hard and resistant to wear, boasting a Rockwell C hardness rating of 55-60. It is the definitive solution for industrial maintenance and repair operations (MRO) where equipment life extension is critical, particularly in the mining, agriculture, construction, and dredging industries.

The electrode features a smooth-running arc that can be operated on both AC and DC+ (Reverse Polarity) currents, providing versatility for various welding power sources found in field and shop environments. The slag is easily detachable, and the bead appearance is smooth, reducing post-weld cleanup time. While the primary defense mechanism of the HF 470 is against abrasion, it retains sufficient toughness to withstand moderate impact loads without spalling, making it suitable for parts that engage with earth, rock, and sand.

Technical Specifications and Metallurgy

The deposit chemistry consists of a rich concentration of chromium carbides dispersed in a tough matrix. This microstructure is what provides the exceptional resistance to low-stress scratching abrasion and high-stress grinding abrasion. Due to the high hardness (RC 55-60), the deposit is non-machinable and must be finished by grinding if dimensional accuracy is required. It is generally recommended to limit buildup to two or three layers to prevent relief checking (cross-cracking), which is a normal and often desirable phenomenon in hardfacing to relieve stress in the weld metal.

Operational Characteristics

Welders will appreciate the HF 470's usability compared to other high-alloy rods. It strikes easily and maintains a stable arc, even at lower amperages within its range. It is designed primarily for flat and horizontal positioning, although skilled operators may use it out-of-position with appropriate technique. The 1/8" (3.2mm) diameter allows for precise bead placement on smaller components like mixer paddles or extensive coverage on larger surfaces like dozer blades and screw conveyors.