Short answer: Inspect at the door, not after you run it. For cold rolled stainless steel sheet and strip, check thickness and width, flatness and surface, burr and edge on slit strip, protective film, and that the EN 10204 3.1 certificate and heat number match the physical material. A three-minute receiving check catches batches you could otherwise only find wasted line time.
Because thin sheet and strip defects appear where you no longer want them — in stamping, blanking, welding or feeding — an incoming checklist protects your schedule. Confirming on arrival is far cheaper than discovering a bad coil mid-production.
Quick Comparison
| Check | Sheet (flat) | Strip (slit) |
|---|---|---|
| Thickness | Micrometer, several points + across width | Micrometer across strand, within coil |
| Width | At both ends | Width tolerance, repeated along coil |
| Flatness / camber | Flatness across sheet | Camber over length, coil set |
| Surface & edge | Scratches, film, edge quality | Burr, edge consistency, film |
Pick the checks by how the material will be used: a stamping line cares about burr and camber; an architectural panel cares about surface and flatness.
What Buyers Should Inspect
- Measure thickness with a calibrated gauge at several points, including across the width, and log the readings against the agreed tolerance.
- Check width (and edge) on strip, burr across the strand, camber over a set length, and coil set before feeding.
- Verify surface for scratches, stains and protective film; confirm flatness on flat sheets and blanks.
Before accepting, cross-check the heat number on the material with the EN 10204 certificate and the spectrum report. See how the mill test certificate ties batch to traceability, and review thickness and width tolerances so you measure against the right limit.
Common Receiving Mistakes
- Measuring thickness only at the edge, missing the crown profile and tolerance across the coil.
- Feeding slit strip without checking burr and camber, then chasing stamping defects later.
- Accepting material before verifying the certificate, heat number and lot against the shipment.
Log the measurements on a simple arrival report, compare them to the order, and keep a sample of the certificate with the batch record. Objection within the agreed window beats a dispute after machining.
Recommended RFQ Wording
State count, dimensions, tolerance basis (EN 10088-2 / mill profile), thickness gauging points, flatness and burr limits where they matter, certificate type (EN 10204 3.1), heat-number marking, and your inspection-window days on arrival.
Agree the inspection method and certificate scope before dispatch, so the receiving check and the certificate use the same basis you will hold to.
How Still Steel Supports the Project
Still Steel supplies cold rolled stainless steel sheet and strip up to 2 mm with consistent dimensions, surface and packing, and provides EN 10204 3.1 certificates and heat traceability. If you need a sampling plan or tolerance basis, write to vip@still-steel.com or discuss by WhatsApp.
Frequently Asked Questions
How do I check thickness of a delivered sheet or strip?
Use a calibrated micrometer at several points across the width and along a coil section, not just at the edge. Compare the readings against the ordered thickness and the agreed tolerance; a single edge reading misses the crown profile across the coil.
Why check burr and camber on slit strip?
Burr and camber are the highest-risk defects in slit strip: they cause feeding, stamping and edge-tracking problems downstream. Measure burr across the strand and visually check camber over a set length before the batch goes to your line.
What certificate should I ask for on arrival?
For traceable material, ask for the EN 10204 3.1 mill certificate and, where agreed, a chemical/spectrum report. Confirm the heat number and lot on the physical material match the certificate before you accept, not after you have run it.
Technical References
- EN 10204 inspection documents for metallic products
- EN ISO 6508 hardness testing / dimensional measurement practice
Reference documents support general inspection principles. The final acceptance decision must follow the applicable contract, standard and inspection plan for the specific product.