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DAkkS-Calibration laboratory

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Rockwell Hardness testing machine

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Knoop reference blocks are calibrated in accordance to DIN EN ISO 4545-3 / ASTM E92. All reference blocks come with a DAkkS-Calibration certificate.

 

For requests and orders you can use our contact form or by phone +49 7024 920310

 

Knoop micro hardness reference block 30x30x6mm

 

HK ScaleHardness value
Hardness reference block 30x30x6mm

DAkkS-Calibration certificate according to DIN EN ISO 4545-3 / ASTM E92

Material: Steel

Dimensions: 30x30x6mm

 

Hardness values may vary - hardness value are given as reference!

HK0,005 250* 300* 400* 500*        
HK0,01 250 300 400* 500* 600*      
HK0,015 250 300 400 500 600* 700*    
HK0,025 250 300 400 500 600 700 800 900*
HK0,05 250 300 400 500 600 700 800 900
HK0,1 250 300 400 500 600 700 800 900
HK0,2 250 300 400 500 600 700 800 900
HK0,3 250 300 400 500 600 700 800 900
HK0,5 250 300 400 500 600 700 800 900
HK1 250 300 400 500 600 700 800 900
HK2 250 300 400 500 600 700 800 900

 

*Due to the limitation of the diagonal to 20µm in DIN EN ISO 4545-2, these hardness reference blocks can only be calibrated according to ASTM E92.