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NEWSDawei Steel Co., Ltd.
Release time：2026-10-26 Visits：34
When purchasing steel or other metal materials internationally, verifying product quality involves more than checking dimensions and appearance. Buyers also need reliable documentation showing what the material is made of, which standards it meets, and how it can be traced back to its production batch.
A Mill Test Certificate (MTC) helps provide this information. For metal importers, procurement professionals, and quality managers, understanding an MTC is essential for material verification, supplier management, and certain import compliance requirements.
This guide explains what an MTC contains, how it differs from an MTR, what EN 10204 certificate types mean, and how buyers can check material documentation before accepting a shipment.
A Mill Test Certificate, also known as a mill certificate or material test certificate in common industry usage, is a document issued by a metal manufacturer that records relevant material information and inspection or test results.
For steel products, an MTC typically identifies the material grade, applicable product standard, heat number, chemical composition, and mechanical properties. Depending on the product and contractual requirements, it may also include heat treatment information and additional test results.
Common fields include:
Material Grade: Identifies the specified steel or metal grade.
Chemical Composition: Records the measured percentages of relevant elements, such as carbon, chromium, and nickel.
Mechanical Properties: May include yield strength, tensile strength, and elongation.
Heat Number: Helps connect the test documentation with the relevant production heat and material traceability records.
The exact contents depend on the product standard, inspection document type, and purchase order.
For example, a buyer purchasing 304 stainless steel sheets should check whether the reported chemical composition and mechanical properties satisfy the applicable specification, rather than relying on the grade name alone.
For more information about available materials, visit our Carbon Steel Products page.
The terms Mill Test Certificate (MTC) and Mill Test Report (MTR) are often used interchangeably in metal trading. However, their titles alone do not establish the inspection level or prove that a document meets a particular standard.
An MTC commonly emphasizes material certification and supporting test information, while an MTR is often used to describe a report of material test results. Actual usage varies among manufacturers, industries, and contractual arrangements.
From an origin perspective, an MTC may contain manufacturer details, production information, and other data relevant to establishing where material originated. However, an ordinary material certificate does not automatically satisfy every legal requirement for proving country of origin.
From a traceability perspective, the heat number helps buyers connect test results with the corresponding material and supporting production records.
When reviewing an MTC certificate, buyers should therefore check its contents, issuing manufacturer, inspection designation, and supporting traceability information instead of relying only on the document title.
EN 10204 is a European standard that defines types of inspection documents for metallic products. Understanding its classifications helps buyers specify the appropriate documentation in their purchase orders.
Type 2.1 — Declaration of Compliance with the Order
The manufacturer declares that the supplied products comply with the order. This document does not include test results.
Type 2.2 — Test Report
The manufacturer provides test results based on non-specific inspection. These results are not necessarily obtained from the specific products being delivered.
Type 3.1 — Inspection Certificate 3.1
This document provides specific inspection results and is validated by the manufacturer's authorized inspection representative who is independent of the manufacturing department.
Type 3.2 — Inspection Certificate 3.2
This document provides specific inspection results validated by the manufacturer's authorized inspection representative and a representative authorized by the customer or an independent inspector, as applicable under the standard.
The appropriate document depends on the purchase order, product standard, project specification, and customer requirements.
For example, a buyer may require an EN 10204 Type 3.1 certificate for a particular steel order. Receiving a Type 2.2 report instead may not satisfy that contractual requirement.
Buyers should confirm the required inspection document type before production or shipment. A higher-numbered certificate should not automatically be assumed necessary for every application.
For metal importers, documentation may serve purposes beyond routine quality control. Certain European import rules require information that helps establish the origin or production history of imported steel.
Under EU sanctions concerning Russian steel and iron products, certain imports involving steel inputs processed in third countries are subject to restrictions and origin-related evidence requirements.
An MTC can be important evidence when it contains the relevant production and origin information. Depending on the product and processing history, additional certificates or supporting documents may be needed.
Importers should distinguish these sanctions-related requirements from the separate EU steel import traceability framework introduced in 2026.
Under the EU Steel Regulation, certain covered steel product categories are subject to requirements to declare and substantiate the country of melt and pour. Commission Implementing Regulation (EU) 2026/1963 applies from October 1, 2026, and specifies evidence requirements, including the MTC information and heat number for covered imports.
During the initial period ending September 30, 2027, certain alternative documents may be accepted under the regulation's conditions. From October 1, 2027, the listed alternative documents may only supplement the MTC rather than independently replace it.
These requirements apply to products within the relevant legal scope, not automatically to every metal shipment entering Europe.
Suppose a European importer orders carbon steel sheets from a supplier in a third country. The supplier provides an MTC containing the material grade and test results, but the document does not clearly identify the country of melt and pour.
The importer should not assume that the shipping country is also the country where the steel was originally melted and cast.
Before shipment or customs declaration, the importer should confirm whether the product falls within the applicable requirements, request the missing evidence, and consult its customs broker or compliance team.
An MTC can support customs compliance, but the importer remains responsible for ensuring that the documentation meets the applicable requirements.
Beyond import documentation, an MTC certificate helps buyers compare material test results with contractual specifications and maintain traceability throughout the supply chain.
A certificate is only useful when its information can be connected to the actual material delivered.
Consider an importer receiving a shipment of 304 stainless steel sheets. During incoming inspection, the quality manager discovers that the heat number on the MTC does not match the number printed on some material labels.
This discrepancy does not automatically prove fraud or defective material. However, the relationship between the certificate and the delivered products has not yet been adequately established.
The buyer should:
Hold the affected material in accordance with the company's quality procedures.
Compare the MTC with product labels, packing records, delivery documents, and available traceability records.
Ask the supplier or manufacturer to investigate the discrepancy and provide verifiable supporting documentation.
Determine whether additional testing or other corrective action is necessary before releasing the material.
If the purchase order also requires impact testing, the buyer should confirm that the relevant results are available and meet the specified acceptance criteria.
Not every steel product requires impact testing. The requirement depends on the applicable specification, service conditions, and contractual requirements.
Before accepting a shipment, check the material grade, applicable standard, heat number, reported test results, and required inspection document type.
Where applicable, also verify dimensions, surface condition, heat treatment, and supplementary testing requirements.
An MTC does not automatically prove that every product characteristic meets every customer requirement. It should be reviewed alongside the purchase order and other relevant inspection records.
For further information about our material range, visit our Stainless Steel Products page.
A consistent verification process can help buyers identify documentation issues before they create delays or disputes.
Step 1: Match the material grade. Confirm that the grade and product standard match the purchase order.
Step 2: Check the heat number. Compare the number on the certificate with the material identification and supporting traceability records.
Step 3: Review the test results. Check chemical composition, mechanical properties, and any additional tests required by the applicable specification.
Step 4: Confirm the certificate type. Verify that the document satisfies the contractual requirements, including any EN 10204 designation.
Step 5: Check origin and supporting documents. For relevant imports, verify the required country-of-origin or melt-and-pour information and any supporting evidence.
If information is missing or inconsistent, contact the supplier or manufacturer before accepting the documentation. For higher-risk applications, consider whether independent verification or additional inspection is appropriate.
Not necessarily. MTC is a commonly used industry term, while EN 10204 Type 3.1 has specific requirements for inspection results and validation. Always verify the document itself.
No single requirement applies to every metal import. The applicable rules depend on the product, its classification, the import circumstances, and relevant contractual or regulatory requirements.
Hold the affected material in accordance with your quality procedures, check the supporting records, and ask the supplier or manufacturer to investigate. Do not assume the material is fraudulent without further evidence.
A Mill Test Certificate helps buyers understand material properties, check contractual requirements, and maintain traceability. For certain European steel imports, it can also play an important role in demonstrating required production information.
By specifying the required documentation before ordering and checking it against the delivered material, importers and quality managers can reduce avoidable disputes and improve purchasing control.
Need help with your next metal order?
Request an MTC sample or contact our team to discuss material specifications, inspection documentation, and traceability requirements.
