| ISO 9001 Quality Management | May state that a quality system is in place, but certification scope and validity are not confirmed. | Operates a documented quality management system with controlled procedures and internal audits. | Holds a valid ISO 9001 certificate covering the relevant manufacturing or trading activities, with certificate scope matching the ordered product. | Valid certificate number, issuing certification body, covered sites, certificate scope, expiry date, and verification record. |
| Incoming Material Control | Material may be accepted mainly by supplier declaration. | Checks heat number, grade, dimensions, surface condition, and basic documentation before production or shipment. | Uses heat-number traceability and documented inspection records from receipt through slitting, leveling, cutting, or packing. | Incoming inspection procedure, heat-traceability example, supplier material certificate, and nonconformance record format. |
| Mill Test Certificate (MTC) | Provides a commercial or generic certificate that may not clearly identify the supplied batch. | Provides a batch-linked certificate with product grade, heat number, dimensions, chemical composition, and mechanical results where applicable. | Provides an EN 10204 Type 3.1 certificate linked to the actual heat and delivery quantity, with results traceable to the ordered material. | Sample redacted MTC showing heat number, product standard, grade, dimensions, chemical analysis, mechanical tests, and authorized signatory. |
| EN 10204 Documentation Level | Often supplies a Type 2.2 document containing non-specific or non-batch-specific test results. | Can issue Type 3.1 documentation when specified in the purchase order. | Confirms the required inspection document before production; uses Type 3.1 for manufacturer-certified batch results and Type 3.2 when independent or purchaser witnessing is required. | Written confirmation of the document type, responsible inspection party, test laboratory, and certificate-to-coil or certificate-to-heat linkage. |
| EN 10051 Applicability | May quote a thickness tolerance without stating the applicable product standard or tolerance class. | Quotes continuously hot-rolled flat products against the agreed edition and tolerance requirements. | States EN 10051 or the agreed equivalent in the purchase order and confirms the applicable thickness, width, edge, flatness, and shape tolerances. | Quotation and order confirmation showing product standard, nominal thickness, nominal width, tolerance class, and edge condition. |
| Thickness Tolerance Control | Uses a general “±” value that may not correspond to the ordered thickness range. | Measures thickness with calibrated gauges at defined positions and records inspection results. | Applies the tolerance table relevant to the nominal thickness and width under EN 10051, rather than using one universal tolerance for all sizes. | Inspection plan, calibrated gauge certificate, measurement locations, actual readings, and the exact EN 10051 tolerance class used. |
| Representative Thickness Reading | May provide only one nominal value, such as 3.00 mm, without actual readings. | Provides several readings across the coil, sheet, or cut length. | Reports actual minimum, maximum, and average readings and confirms that edge exclusion and measurement locations follow the agreed specification. | Redacted dimensional inspection report containing nominal thickness, actual readings, instrument identification, date, and inspector approval. |
| Width and Edge Condition | Width may be described as approximate or nominal only. | Controls width and identifies mill edge, trimmed edge, or slit edge. | Links width tolerance and edge condition to the EN 10051 requirement and the customer’s fabrication process. | Dimensional report, edge-condition statement, width tolerance, and packaging identification. |
| Surface Quality | Uses broad terms such as “good surface” without a defined acceptance level. | Checks rust, scale, scratches, roll marks, dents, and visible defects during production or final inspection. | Defines surface acceptance criteria, repair limits, inspection lighting or method, and rejection handling before shipment. | Surface-quality specification, inspection checklist, defect photographs, and agreed acceptance standard. |
| Mechanical and Chemical Testing | Results may be stated without clear heat or sample traceability. | Provides chemical composition and mechanical results appropriate to the ordered grade and standard. | Ensures test results match the ordered grade, heat number, product form, and applicable standard; additional tests are agreed before production. | Redacted test report, laboratory accreditation information where applicable, sampling method, and heat-number linkage. |
| Calibration and Measurement Control | Calibration status may not be included in the inspection package. | Maintains calibration records for micrometers, gauges, scales, and testing equipment. | Provides current calibration status and uses equipment suitable for the required accuracy and measurement range. | Calibration certificates, equipment identification, resolution, calibration date, and next due date. |
| Nonconformance Handling | Claims are handled case by case without a documented corrective-action process. | Records defects and investigates recurring causes. | Uses documented nonconformance reports, root-cause analysis, corrective action, and replacement or credit procedures. | Redacted corrective-action report, claim workflow, response time commitment, and replacement policy. |
| Pre-Shipment Inspection | Relies mainly on packing-list confirmation. | Performs final checks for quantity, dimensions, surface condition, marking, and packaging. | Provides a pre-shipment inspection package with actual measurements, photographs, packing details, and certificate references. | Final inspection report, packing photographs, bundle or coil identification, and loading record. |
| Traceability After Delivery | Traceability can be difficult once bundles are separated. | Marks bundles or coils with grade, size, heat number, and order reference. | Maintains traceability from the delivered unit back to the MTC, production record, inspection report, and shipping documents. | Sample bundle label, packing list, MTC cross-reference, and traceability map. |
| Recommended Buying Decision | Suitable only when price is the primary concern and the buyer accepts greater verification risk. | Suitable for routine orders where documented inspection and basic batch traceability are required. | Best fit for regulated, repeat, or fabrication-sensitive applications where ISO 9001 controls, EN 10204 Type 3.1 MTCs, and EN 10051 dimensional compliance are contract requirements. | Make certification scope, MTC type, EN 10051 tolerance class, inspection records, and claim procedures contractual requirements. |
