Chromium Carbide Sprayed Valve Balls

Special Coating Valve balls

TongBall chromium carbide sprayed valve balls are specially designed to cope with the superimposed working conditions of high-temperature wear and corrosion. Through the supersonic flame spraying process, a dense coating mainly composed of Cr3C2-NiCr , with a surface hardness of HRC 70-75, maintaining excellent performance below 540°C. Its unique advantage lies in the resistance to abrasive wear and high temperature oxidation/vulcanization corrosion at the same time. It is the ideal choice for smoke dust removal, high temperature valves and wear-resistant rings, and its life is far beyond that of conventional hardened steel balls.

Size Range	1/2" to 56" (Custom sizes available)
Pressure Rating	PN10-PN420 （Class150-4500）
Ball Material	F304, 1.4301, F316,1.4401, A105, F51/53/F55/F60/F44, 17-4PH, Inconel 625/718/825, Monel 400/500,K-500 etc.
Core Process/Coating	Cr₃C₂-NiCr (HVOF/HVAF)
Operating Temperature Range	≤540°C
Core Technical Parameters	Criteria for High-End Technical Level
Thickness Uniformity	Thickness deviation at any spherical position ≤±8%
Thickness Tolerance Range	100 - 500 μm. For ultra-thin coatings (<10 μm) Zero missed-spray allowed
Surface Hardness	HRC 70-75
Bond Strength	≥70 MPa
Adhesion Class	Class 0 per GB/T 9286 (Cross-cut Test). No peeling is allowed.
Interface Porosity	<1%
Surface Roughness (Ra)	≤0.8 µm
Surface Defect Rate	≤0.1 defects per m² ; no cracks or bubbles
Spraying Positioning Accuracy	±0.1mm
Edge Coverage	No edge warping or shrinkage 100% coverage