Flexion test on plastic material

Presentation for participants

Reference of the ILC:



References of test methods:

ISO 178  ASTM D790



For this ILC, there is a risk that the number of registrations is insufficient. So a pre-registration procedure is put in place, as follows:


1 - Participants interested in participating pre-register using the registration form. No invoicing is made for this pre-registration;

2 - When at least 10 potential participants have pre-registered, CompaLab asks each of these pre-registrees to confirm their willingness to participate and what are the characteristics for which they commit to provide results;

3 - If at least 8 participants confirm their intention to participate, the CIL organisation concerned is engaged.


Main characteristics:

σy (yield stress), σm (maximum stress), σb (stress at break), εy (yield strain), εm (strain at maximum stress), εb (strain at break)

Other characteristics:

Et (Modulus of elasticity)


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:


Number of samples per participation:


Max number of operators per participation:

1 (it is necessary to order as many participations as there are participating test operators)

Product submitted to tests:

Plastic material

Type of samples:


Approximate dimensions of samples:

200x20x5-10 mm

Specific preparation to be performed by the participant:

Machining of test specimens (2 test pieces per supplied sample)


Special notice for this ILC:

According to the type of curves, some parameters may not exist


Price (€)


Price if online payment (€)


Approximate weight (kg)