Knoop Hardness Tester

The Knoop hardness tester series "Qness" takes Knoop hardness testing to a whole new level. Our high-end models of the latest generation combine short cycle times with maximum precision. Features like the 8-position tool changer, comprehensive software as well as connectivity via Qconnect make this Knoop hardness tester series the optimum choice for customers seeking the most innovative products on the market.

Micro Knoop Hardness Tester Test force range: 0.25 g – 62.5 kg

NEW

Knoop Hardness Tester QNESS 10/60 M

Semiautomatic
Test force range 20 gf – 10 kgf
Option: 0.25 gf – 62.5 kgf
Vickers, Knoop, Brinell, Option: Rockwell
Manual XY movable cross table
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NEW

Knoop Hardness Tester QNESS 10/60 A+

Fully automated
Test force range 20 gf – 10 kgf
Option: 0.25 gf – 62.5 kgf
Vickers, Knoop, Brinell, Option: Rockwell
Very precise XY slide ± 2µm
Sample image camera:
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NEW

Knoop Hardness Tester Qness 60 A+ EVO

High-End fully automated
Test force range 0.25 gf – 62.5 kgf
Vickers, Knoop, Brinell, Rockwell
High precision XY slide ± 0.2µm
Sample image camera
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Macro Knoop Hardness Tester Test force range: 0.3 kg – 3000 kg

Knoop Hardness Tester Version CS/C EVO

Test methods: Brinell, Knoop, Rockwell, Vickers
Test force range: 0.3 kg – 3000 kg
Proven concept – redefined
Ideal for small samples
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Knoop Hardness Tester Version M EVO

Test methods: Brinell, Knoop, Rockwell, Vickers
Test force range: 0.3 kg – 3000 kg
Manual height adjustable test head
Ideal for large samples
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Knoop Hardness Tester Version E EVO

Test methods: Brinell, Knoop, Rockwell, Vickers
Test force range: 0.3 kg – 3000 kg
Comfortable test head height-adjustment via motor
All work piece sizes and large clamping forces
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Fully Automatic Knoop Hardness Tester Test force range: 0.3 kg – 3000 kg

Knoop Hardness Tester Version CA/CA+ EVO

Test methods: Brinell, Knoop, Rockwell, Vickers
Test force range: 0.5 kg – 750 kg
Proven concept – full automation with high precise XY slide
For applications with consistent sample height
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Knoop Hardness Tester Version A/A+ EVO

Test methods: Brinell, Knoop, Rockwell, Vickers
Test force range: 0.3 kg – 3000 kg
Highly precise test head control by asynchronous motor
Automatic XYZ test progression for different sample heights
Base cabinet and safety fully integrated into machine design
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Background information Knoop Hardness Testing (DIN EN ISO 4545)

In 1939, Knoop, Emerson and Peters developed the Knoop hardness test method in order to enable a more reliable hardness test in thin layers. Basically, it is very similar to the Vickers hardness test. Here, a rhombic diamond pyramid with a longitudinal edge angle of 172.3° and a transverse edge angle of 130° is used as the indenter. This indenter is in turn pressed vertically into a workpiece surface with a specific test force. After unloading, the resulting indentation is measured, and only the long diagonal d1.

The Knoop hardness is then calculated as the quotient of the test force and the projection area of the in-dentation.

The Knoop method is only used in the small force (up to 10 N) and micro hardness range.

1. Indentation of the diamond pyramid with test force F into the test specimen

2. Measurement of the long diagonal d1 of the indentation

Knoop Hardness Test Results

According to DIN EN ISO 6508-1 the result of a Knoop hardness test is indicated as follows:

700 HK 0.2 / 20 ⇒ Hardness value as per Knoop

700 HK 0.2 / 20 ⇒ Abbreviation for Knoop hardness

700 HK 0.2 / 20 ⇒ Test force specification: Test force [N] = 9.807 * test force specification

700 HK 0.2 / 20 ⇒ Application time of the test force (omitted if it is between 1-15 s)