Vickers Hardness Tester – Precision Micro & Macro Hardness Testing
The Vickers Hardness Tester is an advanced and versatile hardness testing instrument that uses a diamond-shaped pyramid indenter to measure the hardness of materials. It is suitable for testing a wide range of materials—from very soft metals to extremely hard ceramics—with exceptional accuracy and minimal sample damage.
NDTMachine supplies high-end Vickers Hardness Tester . Contact us and get your NDT supplies at affordable price.
Typical Applications of Vickers Testing
Metallurgy
Analysis of microstructures, heat-affected zones
Automotive & Aerospace
Surface treatment validation, coating hardness
Electronics & Semiconductors
Hardness of micro-components and IC packaging
Jewelry and Precious Metals
Testing gold, platinum, and other alloys
Medical Devices
Implants, surgical instruments, and small parts
University & Research Labs
Material science and failure analysis
Types of Vickers Hardness Testers
Load range: 10g to 1kg
Used for very thin materials, coatings, and microstructures
Ideal for small parts and cross-sectional analysis
2. Macro Vickers Hardness Tester
Load range: 1kg to 100kg
Suitable for bulk materials and thicker parts
Used in automotive, aerospace, and heavy engineering
Features digital display, touchscreen interface
Often includes automatic turret and objective switching
May support software-based measurement and data export
4. Automatic/Computerized Vickers Hardness Tester
Fully automated testing and analysis
Integrated camera systems for image capture and software for diagonal measurement
Perfect for high-volume lab testing
Advantages of Vickers Hardness Testing
| Advantage | Description |
|---|---|
| Universal application | Works with metals, ceramics, composites, and plastics |
| High resolution | Ideal for microstructures and coating analysis |
| Accurate and repeatable | Reliable results even at very low test loads |
| Small indentation size | Minimal surface damage, allows multiple tests close together |
| Wide test load range | Accommodates both micro and macro testing needs |
| Scalable | Can be manual, semi-automatic, or fully automated |
Vickers vs Other Hardness Testing Methods
| Feature | Vickers | Rockwell | Brinell | Knoop |
|---|---|---|---|---|
| Indenter | Diamond pyramid | Steel ball or diamond cone | Large steel/tungsten ball | Elongated diamond |
| Load Range | 10g–100kg | 15kg–150kg | 500kg–3000kg | 10g–1000g |
| Measurement | Diagonal length | Depth of penetration | Diameter of indentation | Diagonal length |
| Use Case | Thin materials, coatings, micro-parts | General metals | Large/rough materials | Very thin layers |
| Precision | Very high | Moderate | Low to medium | Very high |
Choosing the Right Vickers Hardness Tester
Determine your application: Thin coatings need micro Vickers; bulk testing needs macro models.
Frequency of use: Manual models for low volume; automatic systems for production lines.
Required accuracy: Choose digital or optical systems for higher precision.
Budget considerations: Manual testers are cost-effective; digital models are premium.
Data handling needs: Choose computerized testers for full data logging and export options.
Testing Standards
Vickers Hardness Testers are built in accordance with global testing standards:
ISO 6507 – International standard for Vickers hardness test
ASTM E384 / ASTM E92 – American standards for micro and macro Vickers testing
JIS Z 2244 – Japanese industrial standard
GB/T 4340 – Chinese national standard
These standards govern load application, measurement tolerance, and calibration procedures.
Maintenance and Calibration
Regular cleaning of the optical system
Indenter inspection and replacement when worn
Verification with calibrated hardness blocks
Software and firmware updates for digital models
Check alignment and turret rotation on automated systems
Routine calibration is essential to ensure long-term accuracy and traceability in certified environments.
Vickers Hardness Test Procedure
Prepare the surface: Polished, clean, and flat.
Apply the load: Select appropriate load based on material.
Create indentation: Indenter presses into the surface for a specific dwell time.
Measure indentation: Use microscope to measure the two diagonals.
Calculate HV: Average the diagonals and apply the standard formula.
How Does a Vickers Hardness Tester Work?
The Vickers test involves pressing a diamond indenter in the shape of a square-based pyramid with an angle of 136° between opposite faces into the material using a predetermined force. After the force is removed, the two diagonals of the resulting square indentation are measured using an optical microscope.
The Vickers Hardness Number (VHN or HV) is calculated using the following formula:
HV = 1.854(F / d²)
Where:
F = force in kgf
d = average length of the diagonals in mm
This formula accounts for both the force applied and the surface area of the indentation, ensuring consistent and reproducible results.
Frequently Asked Questions (FAQ)
1. What is the Vickers Hardness Test used for?
It is used to measure the hardness of materials ranging from soft metals to superhard alloys and coatings, especially where fine detail and small test areas are involved.
2. What is the difference between Micro and Macro Vickers testing?
Micro Vickers uses small loads (10g to 1kg) for thin coatings and microstructures, while Macro Vickers uses higher loads (1kg to 100kg) for thicker materials and general testing.
3. What materials can be tested with a Vickers tester?
Almost all solid materials: steel, aluminum, copper, ceramics, composites, plastics, and more.
4. Why is the Vickers method preferred for coatings?
Because it produces very small, precise indentations that don’t damage thin layers and provide accurate results at micro scales.
5. How do I interpret the Vickers Hardness Number?
The higher the HV value, the harder the material. The number also depends on the load used and the indentation size.
6. How often should I calibrate my Vickers hardness tester?
Calibration is typically recommended every 3 to 6 months using certified test blocks.
7. Can Vickers hardness be converted to other scales?
Yes, but with caution. Approximate conversion charts exist for HRC, HB, and tensile strength, but they depend on the material type.
8. Can I automate the Vickers test process?
Yes. Many testers offer motorized stages, image capture, and software to automate indentation and measurement.
9. What’s the difference between Vickers and Knoop testing?
Knoop uses an elongated diamond and is better for ultra-thin materials, while Vickers gives a more uniform and general-purpose test.
10. Is training required to use a Vickers tester?
Basic training is recommended, especially for optical measurement and accurate indentation reading, although digital systems simplify this.
Why Global Clients Choose Us?
At NDTMachine, we are committed to providing high-quality thickness gauges that meet the demands of today’s industries. Our products are designed with a focus on accuracy, durability, and ease of use, ensuring that you can trust them for critical measurements. With years of experience in manufacturing NDT equipment, we have built a reputation for excellence and innovation.
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