HC802 and HC804 Nickel Chromium Powders

Technical Overview of HC802 and HC804 Nickel Chromium Powders

Summary

Hunter Chemical supplies two 80/20 Nickel Chromium powders, HC802 and HC804, each pre-alloyed and produced by water atomization for use in bond coats, surface restoration, and high temperature applications. HC802 offers a coarser particle size ideal for foundational bonding, while HC804 provides a finer distribution for smoother, denser coatings. Both deliver reliable performance in demanding environments and compare favorably with established competitor products. For information, Contact Hunter Chemical today.

Hunter Chemical Nickel Chromium Powders

When components experience wear, damage, or require surface enhancement, nickel chrome alloys are widely used because they combine corrosion resistance, high temperature performance, and strong bonding capability. Hunter Chemical offers two nickel chromium water atomized powders, HC802 and HC804, that are designed for build-up, restoration, and bond coat applications.

Hunter Chemical supplies its 80/20 alloy in two distinct particle size distributions:

  • HC802: -140+325 mesh (approximately -105+45 microns)
  • HC804: -55+20 micron

Water Atomization and Morphology

A water atomization production process of pre-alloyed metal powder yields:
  • Irregular morphology: Angular particles that improve mechanical interlocking during deposition.
  • High surface area: Supports efficient melting and adhesion during spraying or related processes.
  • Consistent composition: Nickel to chromium ratio is maintained across particle sizes.
This type of particle shape, along with other chemical and physical properties, makes both products well suited for these applications.

Comparing HC802 and HC804

While both powders share the same chemistry and production method, their particle size distributions affect coating characteristics.

HC802 (-140+325 mesh / -105+45 micron)

  • Coarser particle size range.
  • Produces coatings with moderate porosity.
  • Commonly applied as a bond coat under ceramic.

HC804 (-55+20 micron)

  • Finer particle size range.
  • Leads to a smoother finish and lower porosity when compared to HC802.
  • Preferred for build-up applications where surface finish and uniformity are critical.

Applications and Use Cases

Both products are often used on parts in high temperature or extreme environments. Expanded examples include:

Bond Coats

Creating a strong underlayer for ceramic or carbide coatings.

Repair & Restoration

Rebuilding worn or damaged components to original specifications.

High Temperature Service

Protecting parts in turbines, boilers, and exhaust systems.

Extreme Environments

Enhancing durability of equipment in chemical processing, oil and gas, and marine operations.

Comparative Performance

Users of Metco’s 43C-NS, 43F-NC or of Höganäs 250.001, 250.002 will improve their competitive advantage by using Hunter Chemical’s HC802 and HC804. Hunter products provide equivalent or improved properties in morphology, particle size distribution, and performance.

Hunter Chemical Expertise

Hunter Chemical has extensive experience in producing and distributing nickel, cobalt, and chromium based raw materials. In addition to HC802 and HC804, the company supplies a wide portfolio of ceramic consumables, including chrome oxide powders. Customers benefit from:
  • Strict quality standards: Consistent performance in demanding environments.
  • Technical support: Assistance with material selection and process optimization.
  • Responsive service: Short lead times and flexible supply.

Contact Hunter Chemical

Hunter Chemical’s HC802 and HC804, produced through water atomization and supplied in controlled particle size ranges, offer reliable solutions for both bond coats and surface build-up applications. Their morphology, resistance to extreme service conditions, and tailored size distributions ensure dependable performance.

For more information on HC802 and HC804, or to request a free sample for evaluation, contact Hunter Chemical today.