Hardness Tester
Hardness testers are complex in design but simple in principle, operation and application. They measure the hardness of a material as its ability to resist permanent deformation from an applied force. Different types of hardness testers vary in how they do this, some equate the depth and shape of the indentation created in the material by a pre-determined force, applied to the surface for a set amount of time. Others calculate the resistance the material offers to a spring-loaded force, or measure the velocity of a rebounded object propelled onto the surface.
Why Choose Us
01
Innovation
Seeking development through innovation, establishing a brand through responsibility, and creating a model of value for Dinganda National Enterprise; Since its establishment, the company has gathered industry elites and continuously pursued the expansion of production scale, rationalization of product structure, and improvement of corporate culture system, promoting the overall strength of the enterprise.
02
Quality Service
Company there are more than 20 employees with high/intermediate technical titles and a sales and service team of over 30 people; Management creates value, service enhances advantages, quality first, and service excellence "is the company's development philosophy.
03
Excellent Quality
Kunpeng spreads its wings, aiming for lofty goals; The road ahead is full of obstacles, and the journey never stops! Our mission is to uphold excellent quality and provide global services to Anda. In the process of development, we continuously contribute excellent products to society, complement the advantages of various sectors of society, and create brilliance together!
04
Diversified Products
The "Ding Anda" brand has evolved from a glass trading company to a comprehensive and powerful enterprise with diversified operations. We have diversified products in the fields of glass machinery, chemical brand "Glass Doctor", integrated production and sales of doors and windows, intelligent warehousing and logistics, etc.
6 Meters Aluminum Profile Cart
Name: aluminum material unloading turnover car
Model: MCUL101
Size: 3000mm*860mm*900mm
Self weight: 45kg
Aluminum Profile Transport Cart
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Size: 2500mm*1340mm*850mm
Self weight: 97kg
Load capacity: 2-2.5t
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Size: 3000mm*860mm*1800mm
Self weight: 80.2kg
Load capacity: 2t
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Size: 1500mm*1060mm*1740mm
Self weight: 72.6kg
Load capacity: 2t
Model: MCUL106
Size: 1200mm*600mm*1500mm
Self weight: 52kg
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Self weight: 65kg
Load capacity: 2t
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Self weight: 129kg
Load capacity: 2t
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Size: 1460mm*800mm*1550mm
Self weight: 65kg
Load capacity: 2t
Model: MCUL112
Size: 1300mm*1200mm*1110mm
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Load capacity: 2t
Advantages of Hardness Tester
1. Portability and speed
The hardness tester, with its compact size and lightweight, becomes an ideal choice for on-site inspections. It can be quickly put into use without complex installation procedures. Additionally, the hardness tester is simple to operate, requires no sampling, and can be directly tested on the material surface, greatly improving detection efficiency. This advantage makes the hardness tester unparalleled in scenarios that require fast and frequent hardness testing, such as production lines and construction sites.
2. High Precision and reliability
The hardness tester uses advanced measurement technology and precise mechanical design to ensure the accuracy and reliability of test results. It also features excellent repeatability, maintaining stable measurement results across multiple tests. This advantage makes the hardness tester an essential tool for quality control and evaluation.
3. Durability and stability
The hardness tester, made with high-quality materials and advanced production techniques, boasts excellent durability and stability. Its compact structure and reasonable design can withstand harsh working environments and frequent usage. Moreover, the hardness tester has a long service life and a low failure rate, providing users with reliable quality assurance. This makes the hardness tester an ideal choice for long-term use.
4. Flexibility and versatility
The hardness tester not only provides basic hardness testing functions but can also be customized and expanded based on different needs. For instance, by changing the indenter and spring, it can adapt to different materials and testing requirements. Additionally, the hardness results measured by the hardness tester can be converted to other hardness units. This makes the hardness tester widely applicable in research and education as well.
Types of Hardness Tester
Brinell
The Brinell Test uses a tungsten carbide ball that is pressed into the metal surface to measure its hardness. The resulting impression is then measured and compared to a calibrated scale to determine the Hardness Number (HB).
The Brinell Test is best used for testing large metal samples, as the impression made by the ball can be quite large. Materials with an inhomogeneous structure are also better tested by the Brinell Test. When tested correctly, the Brinell Test is a reliable and accurate way to measure the hardness of metals.
There are also several automatic Brinell testers available which make the process easier. They can be used to quickly test large batches of metals which make them ideal for product testing. As a result, the Brinell Test is often used in large-scale production processes.
Knoop
The Knoop Test uses a diamond indenter that is pressed into the surface of the metal. The resulting impression is then measured and compared to another calibrated scale to determine the Hardness Number (HK). The Knoop Test is ideal for testing thin materials such as sheet metal and wires.
The process is non-destructive and the small impression made by the diamond indenter causes minor damage to the sample, making it the preferred method for testing delicate metals. The Knoop Test is also more accurate than other methods when it has to do with measuring the hardness of small parts and brittle materials with high precision.
This is why it is sometimes referred to as the "micro hardness" test. It finds relevance in a variety of applications. Materials like foils and thin wires can be tested with the Knoop Test without damaging the sample. The Knoop Test is often used in industries like tool making, metalworking, and electronics.
Rockwell
The Rockwell Test uses a steel ball diamond cone-shaped indenter to measure the hardness of the metals or polymer materials. The indentation is then measured and compared to a calibrated scale to determine the Hardness Number (HR). The Rockwell Test is used for testing a wide variety of materials, including metal alloys and hardened steel. The process is relatively fast and repeatable, which makes it ideal for testing large batches of samples.
The Rockwell Test is also good for measuring the hardness of metals that have been heat treated or coated with a lubricant or other type of protective layer. The Rockwell Test is often used in the automotive and aerospace industries, as it is a reliable method for measuring the hardness of parts and components used in these industries.
It is the most utilized hardness testing method. This method takes into account the permanent depth indentation that is left on the sample after testing. The Rockwell Test can also be used to compare and rank materials according to their hardness.
Vickers
The Vickers Test uses a diamond-shaped indenter to measure the hardness of metals or other materials. The resulting impression is then measured and compared to a calibrated scale to determine the Hardness Number (HV).
The Vickers Test is used for testing harder materials such as hardened steel and is often used for testing thin materials such as sheet metal. It is a broad-range hardness test, meaning it can be used to measure both soft and hard materials.
The Vickers Test is a very precise process and the diamond indenter leaves a permanent record of the hardness of the sample. The Vickers Test is also used for comparing different materials and ranking them according to their hardness.
Harder objects have smaller indentations while softer materials have larger indentations. Two varying forces are used in the buckets rest method, usually 1-100 kg for the macro range and 10-100 g for the micro range.
1.Material characteristics
• Test to check material
• Test hardenability
• Test to confirm process
• Can be used to predict Tensile strength
2. Functionality
• Test to confirm ability to function as designed.
• Wear Resistance
• Toughness
• Resistance to impact
Why Is Hardness Tester Used?
Quality inspections
Many metals suppliers and metal manufacturers use different types of metal hardness testing to ensure the quality purposes. Typically, companies will test the hardness of material received from suppliers to ensure that material meets the quality standards specified, and specifically the desired hardness required for the use of the material.
Measuring the specific hardness needed
Often material is heat-treated to achieve the desired level of hardness that may be higher or lower than the original hardness of the material. In this case, after the material has been heat-treated, it is important to test the hardness to verify that the heat treatment achieved the desired objective of hardening or softening the material to the desired specification.
Maintain consistency
During production, it may be desirable to sample the parts or the material to ensure hardness consistency in the process.
Certifying your metals
Hardness testing is used by different industries, including oil and gas, to certify the hardness of the metal as per an API (American Petroleum Institute) or ASTM standard.
Precautions for Using Hardness Tester
Material
The type of material and expected hardness will determine test method. Materials such as hardened bearing steels have small grain size and can be measured using the Rockwell scale due to the use of diamond indenters and high PSI loading. Materials such as cast irons and powder metals will need a much larger indenter such as used with Brinell scales. Very small parts or small sections may need to be measured on a microhardness tester using the Vickers or Knoop Scale.
When selecting a hardness scale, a general guide is to select the scale that specifies the largest load and the largest indenter possible without exceeding defined operation conditions and accounting for conditions that may influence the test result.
Sample size
The smaller the part, the lighter the load required to produce the required indentation. On small parts, it is particularly important to be sure to meet minimum thickness requirements and properly space indentations away from inside and outside edges. Larger parts need to be fixtured properly to ensure secure placement during the test process without the chance for movement or slippage. Parts that either overhang the anvil or are not easily supported on the anvil should be clamped into place or properly supported.
Cylindrical samples
A correction to a test result is needed when testing on cylinder shapes with small diameters due to a difference between axial and radial material flow. Roundness correction factors are added to your testing result based on the diameter of convex cylinder surfaces. Additionally, it is important to maintain a minimum spacing equal to 2~1/2 times the indentation's diameter from an edge or another indentation.
Sample thickness
Your sample should have a minimal thickness that is at least 10x (ten times) the indentation depth that is expected to be attained. There are minimum, allowable thickness recommendations for regular and superficial Rockwell methods.
Scales
Sometimes it is necessary to test in one scale and report in another scale. Conversions have been established that have some validity, but it is important to note that unless an actual correlation has been completed by testing in different scales, established conversions may or may not provide reliable information. Refer to ASTM scale conversion charts for non-austenitic metals in the high hardness range and low hardness range. Also refer to ASTM standard E140 for more scale conversion information.
Gage R&R
Gage repeatability and reproducibility studies were developed to calculate the ability of operators and their instruments to test accordingly within the tolerances of a given test piece. In hardness testing, there are inherent variables that preclude using standard gage r&r procedures and formulas with actual test pieces. Material variation and the inability to retest the same area on depth measuring testers are two significant factors that affect GR&R results. In order to minimize these effects, it is best to do the study on highly consistent test blocks in order to minimize these built-in variations.
The Application Areas of Hardness Tester
1. Automotive
The demands placed on components and component groups in the automotive industry are high. E-mobility in particular demands ever lighter (and therefore thinner-walled) components that nevertheless have to withstand the same loads as conventional components. A Vickers or Brinell hardness testing gives you the certainty that your customer's requirements will be met.
2. Medical technology
Doctors need to be able to rely on the reliable functioning of their instruments in their work. The requirements for implants are even higher: Once in the body, they must perform their task reliably for years. By testing the hardness of weld seams and soldered joints, we ensure that the instruments and implants you manufacture meet all requirements.
3. Aerospace industry
In the aerospace industry, particularly high demands are placed on the strength and resilience of components. After all, a lot depends on the smooth functioning of each component – not least the health of the crew and passengers. A Brinell or Vickers hardness testings gives you the certainty that your components can withstand the extreme loads that regularly occur during use in these industries.
How to Choose a Hardness Tester?
The test load
This is determined by the hardness of the material. Metals such as steel or alloys, for example, require test loads of up to 3,000 kgf, while soft metals require only 500 kgf. The higher the load, the higher the accuracy. It is important to note that the impression should not exceed 1/10 of the thickness of the sample.
The hardness range
Determines the material of the indenter. Over 650 HB/30 hardness, you should favor a diamond indenter. Below this value, steel or hard metal indenters are suitable.
The accuracy level
Depends on the surface to be measured (cleanliness, flat surface, static or dynamic system, etc.).
The adaptibility of the device
Its importance varies according to the shape and size of the samples to be tested.
Challenges of Hardness Tester
It is necessary to have properly prepared the surface of the sample to be measured, usually by grinding and polishing. The surface condition has a significant influence on the hardness reading, so improper surface preparation can give inaccurate or spurious readings.
Most hardness tests are designed for flat surfaces, so curved surfaces do present a challenge. There are some correction factors that need to be applied to compensate for an indentation on a curved surface.
The size of the indentation can be difficult to ascertain objectively, particularly when manually reading the size of micro impressions through an eyepiece. This is mainly an issue with older machines. The latest models have cameras and software packages to automatically focus correctly, and display the edge of the impression clearly on a connected computer screen.
If the prescribed minimum distances between indentations are not followed according to the testing standards, the results of the hardness test will be affected. This is also true of an indentation too close to the edge of a sample.
Our Factory
DingAnDa Company was established in 1997 and is located in Tianjin, the logistics center city of North China. After more than 20 years of development, the "Ding Anda" brand has evolved from a glass trading company to a comprehensive and powerful enterprise with diversified operations. We have diversified products in the fields of glass machinery, chemical brand "Glass Doctor", integrated production and sales of doors and windows, intelligent warehousing and logistics, etc; The headquarters is located in the beautiful city of Tianjin, radiating across the country with three major industries: glass, doors and windows, and warehousing. It is sold overseas through Qingdao and Tianjin Linhai ports.
Seeking development through innovation, establishing a brand through responsibility, and creating a model of value for Dinganda National Enterprise; Since its establishment, the company has gathered industry elites and continuously pursued the expansion of production scale, rationalization of product structure, and improvement of corporate culture system, promoting the overall strength of the enterprise.
The factory covers an area of 20000 square meters and has a reasonable talent structure, with multiple mechanical, electrical engineers, and chemical engineering PhDs as technical backbones. There are more than 20 employees with high/intermediate technical titles and a sales and service team of over 30 people; Management creates value, service enhances advantages, quality first, and service excellence "is the company's development philosophy.
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