ISO 6508-3, ASTM 18. Vickers (HV). 0.010 - 100. ISO 6507-3, ASTM E384.
Knoop (HK). 0.010 - 1. ISO 4545-3, ASTM E384. Brinell (HB). 1/1 – 10/3000.
Indentec Hardness Testing Product Information Test Blocks & Indenters
Features • Blocks manufactured by hardness tester manufacturer • Calibrated using calibration reference machines • Supplied with a UKAS accredited calibration certificate • Manufactured in accordance to Indentec’s 17025:2005 Quality Assurance System
• • • • • •
Full NADCAP compliance Traceable to national standards Supplied with an individually identified wallet Double or triple calibrated blocks available Re-calibration service Measurement uncertainties supplied for each block
PI 932 2. 0113
Application Hardness Reference Test Blocks are used to indirectly verify a hardness tester. Indirect verification should be performed every 12 months as a minimum in accordance with the appropriate standard.
Additionally it is good practice to verify the hardness tester each morning to ensure that the machine has not been tampered with overnight or that the indenter has not been damaged.
This means that indirect verification should be performed for each hardness scale that is used when testing. This requires 5 indentations to be measured and their repeatability and error confirmed to be within the limits set by the standards. For Rockwell ISO 6508:2 and ASTM E18, Vickers 6507:2 and ASTM E384 and Brinell 6506:2 and ASTM E10.
Indirect verification is an essential part of quality assurance systems and NADCAP accreditation. Test blocks can be made out of a range of different materials depending on the hardness level required, with the most common being steel, brass, and aluminium.
Scale
Scale Range
Certification
Rockwell (HR)
A, B, C, D, E, F, G, H, K,L, M, N, P, R, S, T, W, X, Y
ISO 6508-3, ASTM 18
Vickers (HV)
0.010 - 100
ISO 6507-3, ASTM E384
Knoop (HK)
0.010 - 1
ISO 4545-3, ASTM E384
Brinell (HB)
1/1 – 10/3000
ISO 6506-3, ASTM E10
Indentec Hardness Testing Product Information Test Blocks & Indenters
Features • Available for ANY hardness testing machine make and model • High quality, UK manufactured • Diamonds calibrated using specialist machines • Balls calibrated by batch • Optionally supplied with a UKAS accredited calibration certificate
• Full NADCAP compliance • Manufactured in accordance to a 17025:2005 Quality Assurance System • Supplied in an individually identified container • Re-lapping service where possible • Measurement uncertainties supplied for each indenter with a UKAS certificate
PI 932 2. 0113
Application A good quality indenter is an essential component of a hardness testing machine. Indenters are regularly damaged and this damage will result in inaccurate hardness test results. It is best practice to check for damage to the indenter every day using a hardness test reference block.
Scale
Material
Certification
Rockwell (HR)
Diamond, carbide steel, or steel
ISO 6508-2, ASTM 18
Vickers (HV)
Diamond
ISO 6507-2, ASTM E384
There are hundreds of indenter designs with different threads and head and shaft dimensions. Indentec can supply UKAS accredited indenters for any hardness testing machine. A UKAS certificate is optional. All indenters are manufactured to international standards: Rockwell ISO 6508:2 and ASTM E18, Vickers 6507:2 and ASTM E384, for Knoop ISO 4545-2, and Brinell 6506:2 and ASTM E10.
Knoop (HK)
Diamond
ISO 4545-2, ASTM E384
Brinell (HB)
Carbide steel, or steel
ISO 6506-2, ASTM E10
Also available is a re-grinding and re-calibration service for diamond identers where the damage to the diamond is not too severe.
