Choose the dimensional-tolerance standard from the supplied product route, then record the agreed limits. A material grade alone does not define every dimensional requirement.
Worked selection: a cold-rolled DC01 sheet
Assume an uncoated, cold-rolled sheet for a formed cover: nominal thickness 2.00 mm, width 1000 mm and length 2000 mm. This example selects documents and checks an assumed supplier offer; it does not reproduce a standard tolerance table.
| Question | Reference / action |
|---|---|
| What material and delivery condition? | Specify DC01 and the required surface and delivery condition using EN 10130. |
| Which dimensional requirements? | For this cold-rolled product route, use EN 10131 for dimensional and shape tolerances. Confirm scope and the ordered options with the supplier. |
| What limits actually apply? | Record the agreed edition, thickness and width bands, applicable material category, tolerance class, edge condition and table reference. Obtain the actual limits from the applicable document or a documented supplier agreement. |
| What about the finished cover? | Specify functional hole positions, formed dimensions and angles on the part drawing. The raw-sheet specification does not establish those finished-part limits. |
As a concrete supplier cross-check, SSAB identifies Form 200 Cold-Rolled as meeting DC01 requirements in EN 10130 and supplies dimensional tolerances to EN 10131. This supports the document choice, not a universal numerical tolerance for every DC01 order.
Worked limit check — assumed values
Teaching assumptions, not EN 10131 values: suppose the supplier explicitly offers a thickness interval of 1.90–2.10 mm, while your design requires 1.95–2.05 mm. Ignore measurement uncertainty for this interval comparison; these are specification limits, not measured inspection results.
| Requirement | Lower limit | Upper limit | Total tolerance width |
|---|---|---|---|
| Supplier offer | 1.90 mm | 2.10 mm | 0.20 mm |
| Design requirement | 1.95 mm | 2.05 mm | 0.10 mm |
The offer does not guarantee the design requirement: 1.90 < 1.95 and 2.10 > 2.05. Its interval is twice as wide: 0.20 / 0.10 = 2. A nominal “2 mm” description cannot resolve the mismatch.
Action: obtain written agreement to the required limits, change the design after checking function, or choose another suitable supply route. Do not assume that selecting “special tolerance” automatically gives the required interval.
Record the decision before release
- Keep material grade, product route, nominal dimensions and quantity together.
- Identify the contractual national adoption, edition, amendments and agreed tolerance options.
- Write the numerical limits and their source alongside the functional requirement; confirm width, length and flatness separately.
- Agree measurement conditions and the acceptance decision rule before inspection; near-limit readings need measurement uncertainty to be considered.
Technical references
Scope and supplier references checked 27 October 2026. Full numerical standard tables are not reproduced.