Brinell, Vickers and Rockwell hardness tests of a metal (high hardness)


Presentation for participants

Reference of the ILC: HD19HM
References of test methods: ISO 6506-1   ISO 6507-1  ISO 6508-1        
Frequency: Each year
Time schedule:  
Opening date of registrations Registration deadline Date of shipment of samples Start of the tests Deadline for carrying out the tests and providing the results Date of delivery of reports
15/12/2018 30/06/2019 05/09/2019 15/09/2019 31/10/2019 15/12/2019
Note: After the deadline, registrations are only accepted within the limit of availability of samples
Main characteristics HBW2,5/187,5 (Brinell scale) - HV5, HV10, HV30 (Vickers scales) - HRC (Rockwell scale)
Other characteristics HBW10/3000, HBW5/750, HBW1/30 (Brinell scales) - HRA, HRB (Rockwell scales)
  Caution: The number of determinations may be low for the secundary characteristics, what may make inefficient the comparison between laboratories
Determination of the assigned values (“true values” for each characteristic): By statistical computation of the totality of the results with possible selection on competence criteria (accreditation, validation by a reference body, quantity of tests performed in the year), test to detect possible collusion, merging of results not obtained in reproductibility conditions, suppression of technically unvalid results.
Type of statistical computation: Results are numerical. For each characteristic selected by the participant, 2 results shall be provided for each sample. The statistical computation will provide an assigned value with its attached uncertainty, values of standard deviations for repeatability, for reproductibility and for inter-sample homogeneity, limits of alerts for bias and repeatability of the participant, indiviual values for uncertainty of results of participants.
Number of samples per participant: 3
Product submitted to tests: High hardness metal
Type of samples: Discs
Approximate dimensions of samples: Ø50x9 mm
Specific preparation to be performed by the participant:  None (other than possible necessity to adapt dimensions of the test specimen to the equipment of the participant)
Special notice for this ILC: Forecast hardness level 550-800 HV. Some scales may be inappropriate, according to the type of metal. Participants may provide results for several scales.