Self-Fluxing Nickel Alloy Powder [-325+400]

Why this mesh cut matters for thermal spray

The -325+400 mesh range (approximately 38–44 µm) is a common choice when spray operators need a balance between flowability and melt characteristics. Particles are fine enough to melt completely in the flame or plasma jet, yet coarse enough to feed reliably without clogging hoses or nozzles. This cut is widely used for general-purpose hardfacing and dimensional restoration on shafts, sleeves, and wear-prone machine parts.

Typical coating characteristics

Self-fluxing nickel alloys contain boron and silicon, which act as fluxing agents during spraying. They lower the melting point, promote wetting, and help form a dense, low-porosity coating. When fused after spraying—common with flame spray and some plasma procedures—the coating develops a metallurgical bond with the substrate. The resulting surface offers good resistance to abrasive wear, galling, and mild corrosive environments. Hardness values depend on the specific alloy grade; buyers should confirm the grade’s as-sprayed and fused hardness with the supplier before ordering.

Process compatibility

• HVOF (High Velocity Oxy-Fuel): Produces very dense, well-bonded coatings with low oxide content. Suitable for critical wear surfaces.
• Plasma spray: Offers flexibility with substrate temperature and coating thickness. Often used for larger components or where post-spray fusing is planned.
• Flame spray (powder): A cost-effective route for many workshop applications, especially when followed by a fusing cycle to densify and bond the coating.

Process suitability should always be confirmed for the specific alloy chemistry and application requirements. SPA2Z can advise on grade selection when you share your spray process and target hardness.

Pack options and handling

Standard pack sizes are 5 kg tins, 10 kg tins, and 25 kg pails. The sealed packaging protects the powder from moisture and contamination during storage and transit. Always store nickel alloy powders in a dry, covered area and reseal containers promptly after use to preserve flow characteristics.

About SPA2Z — Self-Fluxing Nickel Alloy Powder supply

SPA2Z supports industrial coating shops, maintenance teams, and distributors who need reliable thermal spray consumables. When you enquire about self-fluxing nickel alloy powder [-325+400], our team helps you confirm the right alloy grade, mesh cut, and pack size for your spray process—whether you run HVOF, plasma, or flame equipment.

We keep the enquiry process straightforward: share your target hardness, spray method, and estimated monthly consumption, and we will provide a grade-specific quotation with current availability. No guesswork, no generic stock lists—just practical supply support for your coating line.