9766.4655S - Josef H63 Hardfacing Electrode 4.0mm - Severe Abrasion

Josef H63 4.0mm Hardfacing Stick Electrode: Technical Overview

The Josef H63 4.0mm Stick Electrode is a premium hardfacing consumable designed specifically for applications requiring extreme resistance to severe abrasion. Engineered with a high-chromium carbide formulation, this electrode produces a weld deposit with a hardness rating of approximately 60-63 HRC (Rockwell C). This level of hardness makes it an indispensable tool for maintenance and repair operations in industries such as mining, quarrying, agriculture, and construction, where equipment is constantly subjected to grinding wear from earth, sand, and minerals.

The 4.0mm diameter is optimized for heavy-duty applications, allowing for higher amperage settings and faster deposition rates compared to smaller diameter rods. This efficiency is crucial when resurfacing large areas on buckets, crusher jaws, or conveyor screws. The electrode operates smoothly on both AC and DC+ currents, providing a stable arc and excellent bead appearance with minimal spatter. The slag release is generally self-lifting or easily removed, reducing post-weld cleanup time.

It is important to note that the weld deposit generated by the Josef H63 is non-machinable due to its extreme hardness. Any required finishing must be performed by grinding. The deposit structure typically consists of primary chromium carbides in a eutectic matrix, which provides the barrier against abrasive media. While it excels in abrasion resistance, it is designed for low-to-moderate impact applications. For high-impact scenarios, a buffer layer or a different impact-resistant alloy might be recommended as a base before applying the H63 cap layer.

Technical Specifications

• Class: Hardfacing / Specialty Overlay
• Diameter: 4.0mm
• Typical Hardness: 60-63 HRC
• Polarity: AC or DC+ (Reverse Polarity)
• Deposit Structure: High Chromium Carbide
• Machinability: Grinding only

This electrode is suitable for overlaying carbon steels, low alloy steels, and manganese steels. Proper surface preparation is recommended to ensure optimal bonding and to prevent porosity. Preheating may be required depending on the base material's carbon equivalent and thickness to prevent underbead cracking.