Determination of the case hardening depth

Presentation for participants

Reference of the ILC




References of test methods

ISO 18203  EN 10328

References of test methods for which the ILC can indirectly provide an assessment of performance

ISO 2639  ISO 3754  ISO 4970  ASTM B934  SAE J423




These may be superseded standards, which some of the reference standards may have replaced, or EN or ASTM or ISO standards that are close but not exactly equivalent to the reference standards.



This ILC can be organised this year thanks to our preregistration procedure, which ensures an enough number of participants.






Main characteristics

CHD (Case hardening depth), SHD (Surface hardening depth), THD (Total thickness of surface hardening depth), CLT (Compound layer thickness) against ISO 18203, DS against EN 10328


Other characteristics





Format of the test results:




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


Number of samples per participation


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 and by several different methods)

Product submitted to tests

Low alloyed steel

Type of samples


Approximate dimensions of samples

Ø20x10 mm

Specific preparation to be performed by the participant

Preparation of surfaces of observation


Special notice for this ILC

ISO 18203 replaces ISO 2639, ISO 3754 and ISO 4970


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


Note: After the deadline, registrations are still possible. Contact us at for more information.


Price (€)


Price if online payment (€)


Approximate weight (kg)