Determination of the grain size and of the content of non metallic inclusions of a non alloyed steel

Presentation for participants

                       
 
Reference of the ILC: ME19NS
References of test methods: ISO 643,  ASTM E112,  ISO 4967,  ASTM E45 Method A-D-E                                      
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 15/03/2019 20/05/2019 01/06/2019 15/07/2019 15/10/2019
Note: After the deadline, registrations are only accepted within the limit of availability of samples
Main characteristics G (Grain size), Rating of A, B, C, D, DS inclusions according to method A and to method B
Other characteristics -
   
                   
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: 6
Product submitted to tests: Non alloyed steel
Type of samples: Bars
Approximate dimensions of samples: Ø40x110 mm
Specific preparation to be performed by the participant:  Preparation of surfaces of observation
                   
Special notice for this ILC: Results obtained by several methods may be provided (if the methods are not destructive)