Versatile hardness testing that ensures repeatability over a wide load range

Duramin-40 – Semi-Automatic and Fully Automatic Micro/Macro Tester

  • Methods: Vickers, Knoop and Brinell hardness testing
  • Load ranges: 10 gf-10 kgf, 10 gf-31.25 kgf, 1 gf-62.5 kgf
  • Semi-automatic and fully automatic micro/macro tester
  • Automatic six-position turret
  • Manual and motorized XY-stage
  • Motorized Z-axis
  • Anti-collision system
  • Automatic illumination
  • Overview camera option
  • Report editor
  • Embedded PC with mouse or touchscreen operation

Duramin-40 is the primary range of Struers micro/macrohardness testers. It is available with a manual and motorized XY-stage and with an overview camera. Duramin-40 comes with three load ranges; 10.0 gf – 10.0 kgf, 10.0 gf – 31.25 kgf, and 1.0 gf – 62.5 kgf. The tester includes an integrated PC with a separate monitor for touchscreen or mouse operation. Dual monitors are also an option. The test cycle is fully automatic, and a motorized six-position turret is standard. Add-on modules include Kc fracture measurements, mapping, and weld measurements.

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The wide test load range from 1.0 gf to 62.5 kgf means that the Duramin-40 can be used for many different applications that previously required both a micro and a macro indentation hardness tester.

Advanced load cell technology

The Duramin-40 conforms to all operating standards while ensuring repeatability throughout the entire load range, thanks to cutting-edge, load cell technology.

Time-saving dual monitors

The optional dual monitor solution enables the general measurement data and macro overview image to be viewed on two different monitors. This eases setup and saves time when executing the advanced test series.


  • Unique hardness testing system

    Load cell technology ensures the highest possible degree of accuracy and repeatability during load application. This eliminates the overshoot and undershoot from dead weight systems. The absence of mechanical weights means that there are no friction problems, and the equipment is less sensitive to misalignments caused by vibrations. Combined with a motorized turret, the entire measurement cycle of loading, indenting, unloading, focusing, and evaluating is carried out extremely quickly.

    Unique hardness testing system
  • Duramin 40 Automatic turret

    Automatic turret

    Human and calibration errors can be avoided with the Duramin-40’s automatic turret. It is available with a six- or seven-position automatic turret, facilitating exchange of up to six indenters and four objective lenses. The exchange of indenter and lens runs fully automatically in every model.

    Automatic turret
  • Duramin 40 Flexible load range

    Flexible test load range

    The unique test load range, from 0.00981 N to 612.9 N, can cover many applications that usually require both a micro- and a macro- indentation hardness tester. Duramin-40 covers a wide range of Brinell, Vickers, and Knoop test methods and can automatically convert hardness values according to current standards.

    Flexible test load range
  • Duramin 40 Motorised Zaxis

    Motorized Z-axis

    Duramin-40 is equipped with a motorized Z-axis as standard. This eliminates the task of manually adjusting the testing height.

    Motorized Z-axis
  • Duramin 40 Overview Camera

    Overview camera

    The optional overview camera makes it easy to position the test point series across a sample and to execute with a few mouse clicks. This feature ensures simplified execution and setup, and is helpful when performing repetitive or high volume CHD-measurements.

    Overview camera
  • Duramin 40 Anti collision protection

    Anti-collision protection

    The machine automatically stops operating in the event of a collision or any unexpected vibration or movements. This prevents indenters and lenses from being damaged and provides optimal operator safety.

    Anti-collision protection
  • Duramin 40 Application specific software modules

    Application-specific software modules

    A number of software modules are available to match particular applications. These include modules covering weld measurement, surface mapping, edge detection, and Kc fracture toughness calculation.

    Application-specific software modules
  • Placeholder

    Test point editor

    Duramin-40 is available with a built-in test point editor to define and set up measurement lines for fully automatic testing; CHD-testing, for example.

    Test point editor


Model Types

All testers within the Duramin-40 range come with motorized Z-axis, high-resolution camera, LED illumination, auto focus, and automatic image evaluation. All include an integrated PC with an eight-inch color touchscreen. Duramin-40 M comes with a manual XY-stage (size 90 x 90 mm, stroke 25 x 25 mm) including manual micrometers. The test height is 0-200 mm. It includes a motorized, six-position measurement turret. Duramin-40 A comes with a test point editor and motorized XY-stage (size 350 x 225 mm, stroke 220 x 120 mm). The test height is 0-200 mm. It includes an automatic, six-position measurement turret. Duramin-40 AC comes with a test point editor and motorized XY-stage (size 350 x 225 mm, stroke 220 x 120 mm). The test height is 0-200 mm. It includes an automatic, seven-position measurement turret, with an overview camera (FOV 200 x 160 mm) for easy test point positioning. Objective lenses and indenters are ordered separately.

Duramin-40 M1/A1/AC1

Duramin 40 M123
Low load hardness tester based on load cell technology for the automatic testing of Vickers, Knoop, and Brinell With an extended test load range of 0.098 – 98.1 N (10 gf – 10 kgf) 

Duramin-40 M2/A2/AC2

Duramin 40 A123
Low load hardness tester based on load cell technology for the automatic testing of Vickers, Knoop, and Brinell With an extended test load range of 0.098 – 306.4 N (10 gf – 31.25 kgf)

Duramin-40 M3/A3/AC3

Duramin 40 AC123
Low load hardness tester based on load cell technology for the automatic testing of Vickers, Knoop, and Brinell With an extended test load range of 0.0098 – 612.9 N (1.0 gf – 62.5 kgf).
Variants 10 gf – 10 kgf 10 gf – 31.25 kgf 1.0 gf – 62.5 kgf
Manual XY-stage Duramin-40 M1 Duramin-40 M2 Duramin-40 M3
Automatic XY-stage Duramin-40 A1 Duramin-40 A2 Duramin-40 A3
Automatic XY-stage + overview camera Duramin-40 AC1 Duramin-40 AC2 Duramin-40 AC3

Struers’ equipment is in conformity with the provisions of the applicable international directives and their appurtenant standards. Struers’ products are subject to constant product development. Therefore, we reserve the right to introduce changes to our products without notice.

Get your Technical Data Sheet for Duramin 40

A short and clear description that gives you an immediate overview to help you make the best choice of equipment.

• Capacity and performance specifications
• Dimensions and weight
• Electrical data
• Noice levels
• Safety

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Technical data sheets for the metallographic equipment for the sample preparation process from Struers

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Get the full introduction, descriptive visuals, and key feature descriptions to help you qualify your choice of equipment.

• Explanatory fotos
• Key feature descriptions
• Technical Data Sheet

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Cutting, mounting, grinding, polishing and verification brochures for the metallographic equipment for the sample preparation process from Struers

Ensuring certainty with Struers tailored support services

To optimize your processes, enhance your quality control performance and ensure equipment availability, we offer a wide range of services, training and support.

From preventive maintenance to training and process analysis, our Service Plans, Service Packages and Single Services are delivered by experienced technical service engineers and application specialists – and can be tailored to match your needs.

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Correct preparation solutions

"True structures require proper and correct applications. Different material properties require broad application knowledge. Struers application specialists are experts in optimizing preparation methods, because application knowledge is necessary to select the correct preparation solutions. Your material – our application solutions.”

Birgitte Nielsen
Application Specialist, Struers ApS

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My relationship with Struers dates back over many years. The reason is their expert advice, good service, and their use of our application laboratory in the case of difficult questions that are best resolved on-site. WWU Münster, Institut für Planetologie Ursula Heitmann Mineral Specimen Preparer
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