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

Presentation for participants

Reference of the ILC: HD20HM
References of test methods: ISO 6506-1   ISO 6507-1  ISO 6508-1  ASTM E10
 ASTM E92  ASTM E18   ASTM A370     
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
15/11/2019 30/06/2020 05/09/2020 15/09/2020 31/10/2020 15/12/2020
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: For numerical results, the statistical computation will provide an assigned value with its attached uncertainty, values of standard deviations for repeatability and reproductibility, limits of alerts for bias and repeatability of the participant, indiviual values for uncertainty of results of participants.
Number of products submitted to tests: 1
Number of samples per participation: 3
Max number of operators per participation: 10 (For this CIL, the type of test and sample size allow to provide results determined by several different operators)
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.