EN 10204
EUROPEAN COMISSION
DPP
Steel Traceability for EU Exports: EN 10204, Heat Numbers & Digital Product Passport
By First Welding Certification Technical Editorial Team
10 Min Read
20 Aug 2026
Table Of Contents
- Introduction
- What Is Steel Traceability?
- Why Is Steel Traceability Important for EU Exports?
- EN 10204 and Steel Material Documentation
- EN 10204 3.1 vs 3.2
- What Is a Heat Number?
- How Heat Number Traceability Works
- Steel Traceability and Digital Product Passports
- What Could a Steel Digital Product Passport Contain?
- EN 10204 + Heat Numbers + DPP: How They Connect
- Example: Steel Export from India to the EU
- Common Steel Traceability Problems
- How Manufacturers Can Prepare for EU Steel Traceability Requirements
- Steel Traceability Checklist for EU Exporters
- Frequently Asked Questions
- Conclusion
Key Takeaways
Certification Scope
Welding Processes
Production Locations
Assessment Cost
Introduction
Steel traceability is becoming a critical requirement for manufacturers exporting to the European Union. Buyers, auditors and regulators increasingly need reliable evidence showing where steel came from, which material was supplied, what tests were performed and how the material can be traced through manufacturing.
For Indian and international steel manufacturers, three concepts are particularly important: EN 10204 inspection documents, heat number traceability and Digital Product Passport (DPP) readiness.
EN 10204 provides a framework for inspection documents for metallic products, while heat numbers create the physical link between steel products and their material test records. At the same time, the EU is developing Digital Product Passport requirements that will increase digital transparency and traceability across the iron and steel value chain.
This guide explains how these systems work together and what steel exporters should prepare for in 2026.
What Is Steel Traceability?
Steel traceability is the ability to track a material from its original production through storage, processing, fabrication, inspection and final delivery.
A robust traceability system can connect:
Purchase Order → Steel Grade → Heat Number → Material Certificate → Test Results → Product Identification → Manufacturing Record → Final Product
For example, a steel plate supplied for an EU project may carry a heat number that can be linked to its material certificate. The certificate may contain information such as chemical composition, mechanical test results, product standard and other applicable inspection data.
This creates an auditable chain of evidence for the material used in the finished product.
Why Is Steel Traceability Important for EU Exports?
European customers increasingly expect manufacturers to provide documented evidence of material quality and conformity.
Traceability becomes especially important for products used in sectors such as:
- Structural steel
- Pressure equipment
- Industrial machinery
- Railway components
- Heavy engineering
- Fabricated steel structures
- Energy infrastructure
For certain regulated products, traceability requirements may also form part of the applicable conformity assessment or technical documentation.
For example, the Pressure Equipment Directive requires suitable procedures for identifying materials contributing to pressure resistance from receipt through production to final testing.
Therefore, traceability should not be treated simply as paperwork. It is part of a manufacturer’s overall quality and compliance system.
EN 10204 and Steel Material Documentation
EN 10204 defines different types of inspection documents used for metallic products.
Common inspection document types include:
| Type | General Purpose |
|---|---|
| 2.1 | Declaration of compliance with the order |
| 2.2 | Declaration of compliance with test results from non-specific inspection |
| 3.1 | Inspection document containing specific inspection results validated by the manufacturer's authorized inspection representative |
| 3.2 | Inspection document with specific results validated by the manufacturer's authorized representative and an additional authorized inspection representative |
The exact certificate required depends on the purchase order, product standard, application and contractual requirements.
EN 10204 3.1 vs 3.2
The distinction between 3.1 and 3.2 is particularly important for exporters.
A Type 3.1 certificate provides specific inspection results for the supplied product, validated by the manufacturer’s authorized inspection representative.
A Type 3.2 certificate adds verification by another authorized inspection representative according to the applicable contractual or regulatory arrangement.
The certificate should correspond to the actual material supplied, including the relevant identification and test information. PZVAR’s EN 10204 guidance provides further detail on Type 3.1 and Type 3.2 documentation.
What Is a Heat Number?
A heat number is a unique identification assigned to a particular batch or heat of metal produced during steelmaking.
It provides an important link between the physical steel and its manufacturing and testing records.
For example:
- Steel Plate: S355
- Thickness: 20 mm
- Heat Number: H123456
- Material Certificate: EN 10204 3.1
- Chemical Analysis: Recorded
- Mechanical Tests: Recorded
If the heat number marked on the steel can be matched with the certificate, the manufacturer can demonstrate a clear relationship between the physical material and its documented properties.
How Heat Number Traceability Works
A practical traceability system should maintain material identification throughout the manufacturing process.
- Material Receipt
When steel arrives at the factory, record:
- Supplier
- Material grade
- Dimensions
- Quantity
- Heat number
- Material certificate
- Purchase order
- Applicable specification
- Material Storage
Materials should remain identifiable during storage.
Mixing materials with different heat numbers without adequate identification controls can create traceability problems.
- Cutting and Processing
When a plate, pipe or section is cut into smaller components, the original identification should be transferred or otherwise controlled so the new components remain traceable.
- Fabrication and Welding
The material identification should remain linked to the relevant fabrication and welding records.
Where required, this can include:
- WPS
- WPQR
- Welder qualification
- Welding records
- NDT reports
- Inspection records
- Final Inspection
The final product should be traceable back to the relevant material documentation and manufacturing records.
This creates an evidence chain that can be reviewed during customer audits, certification audits or inspection activities.
Steel Traceability and Digital Product Passports
The next major development is the Digital Product Passport.
Under the EU’s Ecodesign for Sustainable Products Regulation (ESPR), Digital Product Passports are intended to make relevant product information more accessible across the product lifecycle.
For iron and steel, the European Commission identifies the sector as a priority product group. Specific requirements are expected to be established through a future product-specific delegated act.
The European Commission currently indicates an indicative Q4 2026 timeline for the adoption of the iron-and-steel ESPR delegated act.
This means steel manufacturers should start preparing their data and traceability systems now rather than waiting for the final requirements.
What Could a Steel Digital Product Passport Contain?
The exact mandatory data requirements for iron and steel will depend on the applicable EU legislation and future delegated act.
However, manufacturers should consider building structured digital records around information such as:
- Product identification
- Steel grade
- Material specifications
- Heat number
- Material certificate
- Chemical composition
- Mechanical properties
- Manufacturing information
- Recycled content, where applicable
- Environmental information
- Sustainability-related data
- Compliance documentation
- Product lifecycle information
The European Commission states that DPPs are intended to improve transparency and traceability and provide access to information about product characteristics, material composition, circularity and sustainability-related attributes.
EN 10204 + Heat Numbers + DPP: How They Connect
These three elements should not be viewed as separate systems.
They can form a connected traceability chain:
Heat Number
↓
EN 10204 Material Certificate
↓
Chemical & Mechanical Test Results
↓
Manufacturing / Fabrication Records
↓
Inspection & NDT Documentation
↓
Final Product Identification
↓
Digital Product Passport
The future of steel compliance is therefore moving toward connected, structured and digitally accessible product information.
Traditional certificates remain important, but manufacturers increasingly need the underlying information to be accurate, consistent and digitally manageable.
Example: Steel Export from India to the EU
Consider an Indian manufacturer producing structural steel components for an EU customer.
The manufacturer receives steel plates with different heat numbers.
A strong traceability process could look like this:
Step 1: Receive steel and verify the heat number.
Step 2: Match the heat number with the applicable EN 10204 material certificate.
Step 3: Record the material in the company’s traceability system.
Step 4: Transfer material identification during cutting and fabrication.
Step 5: Link the material to welding and inspection records.
Step 6: Complete required quality inspections and NDT.
Step 7: Link the completed product with its supporting documentation.
Step 8: Maintain structured digital product information for future DPP requirements.
The result is a traceable information chain from raw steel to finished export product.
Common Steel Traceability Problems
Manufacturers often encounter traceability issues because of simple process failures.
Common problems include:
- Heat numbers are missing after cutting.
- Material certificates cannot be matched with physical material.
- Different heats are mixed during storage.
- Certificates contain incorrect material identification.
- Traceability is maintained on paper but not digitally.
- Inspection records are stored separately from material records.
- Material identification is not transferred to fabricated components.
- Supplier documents are incomplete.
- Production and QA records use inconsistent identification numbers.
These issues can create unnecessary delays during inspections and customer audits.
How Manufacturers Can Prepare for EU Steel Traceability Requirements
A practical preparation strategy should include five steps.
- Standardise Material Identification
Create a controlled procedure for recording and transferring heat numbers throughout production.
- Digitise Material Certificates
Maintain searchable digital copies of EN 10204 certificates and link them to the relevant material identification.
- Connect Quality Records
Where applicable, link material records with:
- WPS/WPQR
- Welder qualifications
- NDT reports
- Inspection reports
- Production records
- Build Structured Product Data
Do not store compliance information only as disconnected PDF files. Establish structured records that can be retrieved and connected to individual products.
- Prepare for DPP Requirements
The European Commission’s DPP framework is progressing, and the iron-and-steel sector is expected to receive product-specific requirements. Preparing traceability and product data systems now can reduce future compliance disruption.
Steel Traceability Checklist for EU Exporters
Before shipping steel products to an EU customer, manufacturers should verify:
- Material grade is correctly identified.
- Heat number is recorded.
- Heat number matches the material certificate.
- Required EN 10204 inspection document is available.
- Material identification remains traceable after cutting.
- Relevant manufacturing records are linked to the material.
- Required welding documentation is available.
- Required NDT and inspection records are maintained.
- Final product identification is controlled.
- Documentation can be retrieved quickly.
- Product information is being prepared in a structured digital format.
Frequently Asked Questions
Is EN 10204 mandatory for every steel export to the EU?
Not necessarily. The required inspection document depends on the applicable product standard, purchase order, contract, regulatory requirements and customer specifications.
What is the difference between EN 10204 3.1 and 3.2?
Type 3.1 involves specific inspection results validated by the manufacturer’s authorized inspection representative. Type 3.2 adds verification by an additional authorized inspection representative according to the applicable requirements.
Why is the heat number important?
The heat number provides a traceability link between the physical steel and the material’s production and test records.
Is a Digital Product Passport currently mandatory for all steel exports?
No. The EU is developing product-specific DPP requirements for iron and steel. The European Commission currently indicates an expected sector-specific delegated act in Q4 2026. Manufacturers should therefore prepare for the upcoming framework rather than assume that a universal steel DPP obligation is already in force.
How can manufacturers prepare for Digital Product Passports?
Start by standardising product identification, digitising material certificates, maintaining heat number traceability and connecting quality, inspection and manufacturing records into structured product data.
Conclusion
Steel traceability for EU exports is evolving from a documentation requirement into a broader digital information strategy.
EN 10204 provides important inspection documentation, while heat numbers create the critical link between physical steel and its test records. Digital Product Passports are expected to take traceability further by improving access to product, material, sustainability and lifecycle information.
For steel manufacturers exporting to Europe, the best approach is to establish a strong traceability foundation now: accurately identify materials, maintain EN 10204 documentation, preserve heat number traceability and progressively digitise product information.
As EU requirements for iron and steel DPPs develop, manufacturers with reliable digital traceability systems will be better positioned to respond to new compliance and customer-data requirements.
Need support with EN 10204, material traceability, welding certification or EU compliance? PZVAR can help manufacturers understand applicable certification and inspection requirements for international markets.