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Hardness Test

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Hardness tests are also frequently called indentation tests. During these tests a tool is used to force an impression on the surface of the material; generally, one material is used to scratch another material or a series of materials. These tests are mostly done on metal or stone. Read More…

Hardness Test A hardness test is performed to determine the hardness of a material by examining how well it resists deformation. This information is beneficial because indentation hardness correlates linearly with tensile strength, which is a material's resistance to the force that tears it apart.
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West Conshohocken, PA  |  610-825-3310

For over 40 years, Strainsert Company has been an industry leader in manufacturing calibration services. Our goal is to provide calibrating services that are thorough and accurate, and we have experience serving a variety of applications.

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Strainsert Company $$$

Monterey, CA  |  831-373-0200

Sierra provides accurate calibration services for mass flow meters and controllers, insertion thermal flow meters, vortex, and ultrasonic flow meters. With more than 40 years of expertise in gas, air, or liquid flow calibration, you can count on our team to make sure your flow meter operates with efficiency and pinpoint accuracy. We believe in providing personalized and customized service, and doing everything we can to maintain credibility with our clients. To get started, contact Sierra today!

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Sierra Instruments $$$

North Haven, CT  |  203-484-3707

Custom Calibration Inc. specializes in on-site and laboratory calibration which will keep costly equipment downtime to a minimum and maximize your overall productivity. We have over 30 years of experience providing calibration services for mechanical, dimensional, scale, torque, humidity, and many more applications. Our company’s mission is to achieve total customer satisfaction by providing prompt, precise, tailor-made calibration solutions to fit your specific needs.

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Custom Calibration Inc. $$$

Frederick, MD  |  410-857-1880

ETI is a leader in the calibration of critical test and measurement equipment. Our NIST-traceable calibration services encompass a wide variety of electrical, mechanical, radio frequency (RF), pressure, physical-dimensional, and environmental instrumentation. As a long-term manufacturer of circuit breaker testers, we also have specialized knowledge, tools, and expertise calibrating high-current ammeters that can’t be found at other calibration laboratories.

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ETI Precision $$$

Minneapolis, MN  |  800-328-1235

Process Measurement Company is an ISO/IEC 17025:2005 accredited calibration lab, offering instrument calibration services and equipment calibration to a wide variety of industries. Our calibration company is headquartered in Minneapolis with offices in Denver, Kansas City and Omaha.

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Process Measurement Company $$$

York, PA  |  717-266-5775

Micron Inspection & Calibration Services, Inc. is a full-service calibration and inspection laboratory, established in November 1997, faithfully serving South Central PA and businesses throughout the nation. We are a woman-owned & minority-owned business. Our staff is comprised of expertly trained personnel with military, engineering, quality assurance and inspection backgrounds.

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Micron Inspection & Calibration Services $$$

Hudson, NH  |  603-882-7464

Kon-Sult, Inc., has served the precision measuring device industry for over 45 years. We are an independent lab providing calibration, repair or replacement of close tolerance measuring equipment. Our experienced staff has performed both on-site and in-house calibration for thousands of companies coast to coast across the United States since 1973.

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Kon-Sult, Inc. $$$
placeholder image Strainsert Company Sierra Instruments Custom Calibration Inc. ETI Precision Process Measurement Company Micron Inspection & Calibration Services Kon-Sult, Inc.

The results are compared and examined. Sometimes bending, scratching, cutting, abrasions or penetration is used to evaluate hardness as well. Hardness tests can be done manually by a worker using a sharp tool to gouge at the material's surface or it can be performed by a machine. Hardness cannot be automatically determined by calculating the fundamental units of mass, length and time. Instead, a hardness value is the result of a certain procedure that provides accurate responses instead of estimations. The Mohs Scale ranks materials on their ability to resist scratching by another material, one of the most common, basic and longest known techniques of taking a hardness test.

The results of hardness tests are used as basis for the comparison of materials, heat treatment, quality control and more. This is necessary knowledge for industrial and manufacturing companies to determine materials and specifications for parts and products.

Hardness Test Hardness Test - Inspec, Inc.

Hardness tests usually measure the depth or area of an indentation left by a tool of a specific shape with a certain force applied to it for a period of time. There are three main testing methods that use this basic procedure. One of the most common is the Rockwell hardness test which uses a small steel ball for soft material or a diamond cone for harder surfaces. The depth of penetration is measured automatically by the machine and displayed as a Rockwell hardness number.

Another widely used method is the Brinell test. It also uses a steel ball which averages 10 millimeters in diameter. The Brinell hardness number (BHN) is closely related to the tensile strength of the material; this test, like the Rockwell, is simple, fast and does not destroy the product being tested. The Vickers test can be a microhardness test; that is, the indentations made during the testing process are so small that a microscope is required to take a measurement. On the other hand, a macroindentation can be seen with the unaided eye.

The Vickers hardness test uses a triangular shaped tool to impress a pyramidal shape into the material if the metal or stone surface will allow it. Like other calibration services, hardness testing provides data and numerical discrepancies between samples; however, unlike machine or speedometer calibration the strength of the material cannot be quickly adjusted but rather must be reformulated or recreated.