Determination of decarburization depth
Presentation for participants
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TDC25LS |
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References of test methods |
ISO 3887 ASTM E1077 |
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Frequency |
This ILC can be organised this year thanks to our preregistration procedure, which ensures an enough number of participants. |
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Main characteristics |
d₁ (total decarburization), d₂ (functional decarburization), d₃ (partial decarburization), d₄ (global decarburization) |
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Other characteristics |
Surface carbon content, heart carbon content, surface hardness, heart hardness |
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Caution The number of determinations may be low for the secundary characteristics, what may make inefficient the comparison between laboratories |
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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. |
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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. |
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Number of products submitted to tests |
1 |
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Number of samples per participation |
6 |
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Max number of operators per participation |
10 (For this ILC, the type of test and sample size allow to provide results determined by several different operators and by several different methods) |
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Product submitted to tests |
Low alloyed steel |
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Type of samples |
Discs |
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Approximate dimensions of samples |
Ø20x30 mm |
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Specific preparation to be performed by the participant |
Preparation of surfaces of observation |
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Special notice for this ILC |
Determinations of d₁, d₂, d₃, d₄ can be performed with the 3 methods : metallographic, chemical and/or hardness |
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Time schedule: |
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Opening date of registrations |
20/12/2024 |
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Registration deadline |
30/06/2025 |
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Date of shipment of samples |
29/08/2025 |
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Start of the tests |
03/09/2025 |
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Deadline for carrying out the tests and providing the results |
27/10/2025 |
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Date of delivery of reports |
06/12/2025 |
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Note: After the deadline, registrations are still possible. Contact us at ilc@compalab.org for more information. |
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Price (€) |
375 |
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Price if online payment (€) |
300 |
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Approximate weight (kg) |
2 |
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