Hansheng Automation (Dongguan) Co., Ltd. is one of the most experienced manufacturers and suppliers of crn coating in China. If you're going to wholesale bulk cost-effective crn coating made in China, welcome to get pricelist and quotation from our factory. Also, customized service and OEM&ODM service are available.
Chromium Nitride (CrN) is a high-performance transition metal nitride coating deposited via Physical Vapor Deposition (PVD). At Hansheng, we do not just apply coatings-we integrate high-precision CNC machining with advanced PVD surface treatments. We are your One-Stop Manufacturer-delivering precision CNC parts fully optimized with high-performance Chromium Nitride (CrN) PVD coatings.
What is CrN Coating?
Chromium nitride (CrN) coating is a specialized metal hard coating produced through physical vapor deposition (PVD) technology. This process makes the surface harder than steel, extremely smooth, and chemically inert. It is suitable for applications requiring high load-bearing capacity and resistance to adhesive wear (galling).
Why is Hansheng's CrN special?
As a source factory equipped with gear plants, CNC machining centers, and foundries, we oversee the entire lifecycle of component production. The quality of coatings depends on whether the base material processing meets standards. At Hansheng, we ensure that before applying coatings, the base material, surface finish, and heat treatment are all prepared to provide optimal adhesion for the coating process.
Technical Specifications of CrN PVD Coating
| Property / Parameter | Technical Specification |
| Coating Material | Chromium Nitride (CrN) |
| Deposition Technology | Arc Evaporation / Magnetron Sputtering (PVD) |
| Micro-Hardness | 1,750 – 2,100 HV |
| Coefficient of Friction | ~ 0.5 (vs. dry Steel) |
| Coating Thickness | 1.0 – 5.0 µm (Microns) – Preserves tight tolerances |
| Maximum Service Temp. | 700°C (1,292°F) |
| Substrate Compatibility | Tool Steel, Stainless Steel, Carbide, Brass, Copper |
| Appearance & Color | Silver-Grey (Metallic finish) |
Why Choose CrN Coating Over Others?
Good anti adhesion performance
The friction coefficient of CrN is relatively low and can form a barrier, effectively preventing the phenomenon of "cold welding".
01
Strong corrosion resistance
The dense barrier formed by CrN can effectively prevent oxidation and chemical corrosion, especially in humid or corrosive environments, and its performance is better than TiN.
02
high toughness
CrN is less prone to brittle cracking than other hard coatings, and can withstand impact and high contact stress without cracking (peeling).
03
thermal stability
Its antioxidant temperature can reach up to 700°C, and it can also maintain hardness in high-temperature applications such as high-speed dry cutting or hot forging.
04
Comparison Table
| Feature | CrN(Chromium Nitride) | TiN (Titanium Nitride) | Uncoated Steel |
| Color | Silver / Metallic Grey | Gold | Steel Grey |
| Hardness (HV) | 1,750 - 2,100 | ~2,300 | ~200-600 |
| Thickness | 2 - 5 microns | 2 - 5 microns | N/A |
| Friction Coeff. | 0.5 (Low) | 0.6 | > 0.8 |
| Oxidation Temp | 700°C | 500°C | Low |
| Corrosion Resist. | Excellent | Good | Poor |
| Best For | Molds,Cu/Al Machining | General Purpose | Low Cost |
Applications
We apply CrN coating to solve specific manufacturing challenges in various industries.
Plastic & Injection Molds
Highly recommended for core pins, cavities, and sliders used in molding abrasive glass-filled resins or corrosive plastics (such as PVC), where the mold must resist acidic gas corrosion.
Precision Cutting & Forming Tools
Ideal for hobs, taps, drills, and punches that process copper, aluminum alloys, and soft metals, ensuring clean cuts without cold-welding.
Mechanical Sliding Components
Reduces friction and fretting wear in valves, pistons, shafts, and automation components that operate with minimal lubrication.
Our Capability
Unlike suppliers who only provide coating services, our coating services exist based on our CNC machining process. At Hansheng, coating services are a part of the entire production process, which means it will save you a lot of time. Of course, you can also choose us to coat your existing parts.
Material selection: Purchase high-quality tool steel or carbides.
Precision CNC machining: Manufacturing parts according to precision tolerances (± 0.005mm).
Surface treatment: professional polishing and ultrasonic cleaning (crucial for coating adhesion).
PVD coating: Use advanced coating systems to coat CrN layers.
Quality control: Verify hardness, thickness, and size.
FAQ
Q: What is the difference between CrN and TiN? Which one should I choose now?
A: TiN (gold) is a good universal coating. But if you are dealing with high loads, corrosive environments, or processing viscous materials such as copper, aluminum, or titanium, CrN (silver) is better because CrN has better wear resistance.
Q: Will the coating change the dimensions of my high-precision CNC parts?
A: The impact is minimal. CrN is a thin film coating (usually 2-4 microns), which is within the tolerance range. For ultra precision parts, we can explain this growth during the CNC machining stage - this is the advantage of our one-stop service.
Q: What materials can be coated with CrN?
A: We can coat most tool steels, stainless steels, high-speed steels (HSS), carbides, as well as certain grades of titanium and copper alloys.
Q: Can you provide coating samples?
A: Yes, we welcome sample testing. Contact our engineering team to arrange a trial run for your specific application.
Q: Do you still provide CNC machining services?
A: Yes. This is one of our main services. In our CNC machining center, we have advanced equipment and experienced engineers who will escort your parts processing.
Q: What is the typical thickness of a CrN coating on machined parts?
A: The standard thickness is between 1 and 5 microns (µm). Because the PVD layer is extremely thin and uniform, it follows the exact geometry of the part, preserving sharp edges, fine threads, and tight tolerances without requiring post-coat machining.
Q: Can CrN coating be applied to aluminum substrates?
A: Because the PVD process requires temperatures between 200°C and 450°C, the substrate must be able to withstand this heat without losing its mechanical properties or warping. High-temperature aluminum alloys or specific low-temperature PVD processes can be evaluated by our engineering team on a case-by-case basis.
Q: How does CrN coating compare to Hard Chrome Plating?
A: CrN is a dry, environmentally friendly PVD process that offers higher hardness (up to 2200 HV vs. 1000 HV for hard chrome) and excellent adhesion. Unlike traditional wet electroplating, PVD CrN does not carry the risk of hydrogen embrittlement or generate hazardous hexavalent chromium waste.
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