When you import precast accessories, the document that protects you is the mill test certificate, and its EN 10204 type tells you how much it is worth. 2.1 = a compliance declaration, no results. 2.2 = results from general production, not your material. 3.1 = actual results for the material you received, signed by the maker's independent QC — the working minimum for a load-bearing anchor. 3.2 = 3.1 plus an independent third party (SGS, BV, Lloyd's, TÜV, DNV) witnessing and co-signing. Two traps recur: a certificate that omits required values (often Charpy) is not compliant even if what it shows is in spec; and heat-number mismatches between cert and marking are a leading traceability failure. Require the certs before the goods ship, and check the heat numbers against the parts.
1. On a lifting anchor, the paper is the product
You cannot see the difference between a good anchor and a dangerous one. Two anchors, same shape, same thread, same finish — one hot-forged from certified steel, one cold-headed from unknown stock — sit identically in a box. The only thing that separates them is the certificate, and whether you can trust it.
Which makes buying precast anchors a document problem as much as a metal problem. This guide is about the one document that decides it: the EN 10204 mill test certificate — what its type means, and the two ways a certificate lies.
2. The four certificate types, on a ladder
EN 10204 is the European standard for material inspection documents, and it is referenced in procurement contracts worldwide, far beyond the EU. It defines four types, and they are a ladder of assurance — the higher you climb, the harder the document is to fake:
Declaration of compliance
"It meets the order." No test results at all. Fine for a washer; useless for a lifting anchor.
Test report, non-specific results
Real numbers — but from general production testing, not from your material. Better than nothing, still not your steel.
Inspection certificate — specific results
The actual mechanical and chemical results for the material supplied, traceable to a heat number, validated by the maker's independent quality department. The working minimum for load-bearing anchors.
3.1 + third-party witness
Everything in 3.1, additionally witnessed and co-signed by an independent third party — SGS, Bureau Veritas, Lloyd's, TÜV, DNV, or your own inspector. The highest routine assurance.
3. Which type for which part
| Component | Minimum type | Why |
|---|---|---|
| Lifting anchors, clutches, load-bearing sockets | ✓ 3.1 (3.2 for the highest-consequence lifts) | Safety-critical; a person is under the load. You need the results for this steel, traceable. |
| Cast-in channels, fixing sockets, structural connectors | 3.1 | Structural; specified against a grade that must be verified per batch. |
| Formwork accessories, tie rods, magnets | 3.1 typical; 2.2 acceptable for non-structural parts | Function matters; consequence of failure is lower. |
| Plastic spacers, caps, non-load consumables | 2.1 / 2.2 | Not load-bearing; a declaration is proportionate. |
4. Heat numbers — where certificate meets metal
A certificate is only worth something if it belongs to the parts in front of you. The link between the two is the heat number (or cast number): the identifier of the specific batch of molten steel the part was made from, stamped on the material and printed on the certificate.
Heat-number mismatches are a leading cause of traceability failure at incoming inspection. Some are innocent — a clerical slip at the mill, or re-marking during processing. The dangerous ones are deliberate: a valid certificate applied to non-conforming material to get it past inspection. You cannot tell which is which from the paper, which is exactly why the check is physical: read the number on the parts, read the number on the certificate, and confirm they are the same.
5. The incomplete-certificate trap
This is the one that catches careful buyers, because the certificate looks fine. Every value on it is within specification. The problem is what is not on it.
The defence is unglamorous and effective: read the certificate against your specification line by line. For a lifting anchor, that means confirming the certificate actually reports every property the spec demands — grade, full chemistry, tensile, yield, elongation, and impact toughness where required — not just the ones that happen to be printed. If a required value is absent, the certificate is incomplete, and an incomplete certificate for a safety-critical part is a rejection, not a negotiation.
6. Ask for the certificates before it ships
Timing is leverage. Require the mill certificates before the goods leave the factory — not after they arrive.
Two reasons, both practical:
- Cost. Chasing missing paperwork while material sits idle at the port costs demurrage, storage and project delay. The document should have been ready before the container was.
- Leverage. Before you have paid and taken delivery, the supplier has every incentive to produce the document. After, they have very little. Make the certificates a condition of shipment in the purchase order, and confirm you have reviewed and accepted them before release.
Certificate ≠ inspection
One more distinction, because it is where buyers relax too early. A 3.1 certificate verifies the steel from testing. A pre-shipment inspection verifies the parts — that the boxes contain the right items, correctly made, correctly marked, correctly counted, and that the certificate actually corresponds to them. They answer different questions. For safety-critical anchors, do both: a 3.1 (or 3.2) certificate and a pre-shipment inspection close the gap between paper and product.
7. The buyer's checklist
Specify the certificate type in the PO — "EN 10204 3.1" for load-bearing anchors, 3.2 for the highest-consequence lifts.
Require certs as a condition of shipment — reviewed and accepted before the container is released.
Read the certificate against your spec, line by line — every required value present, especially impact toughness.
Match the heat number on the certificate to the number marked on the parts.
Add pre-shipment inspection for safety-critical anchors — paper and product verified separately.
Buy direct from the manufacturer — ask for the forging/heat-treatment logs and batch test records a trader cannot produce.
Confirm the product spec itself — for lifting anchors, that they're hot forged, not cold headed; ratings stated with concrete grade and edge distance.
Frequently asked questions
What is an EN 10204 mill test certificate?
EN 10204 is the European standard that defines the types of inspection document a metallic product can be supplied with. It is referenced in procurement contracts worldwide, well beyond the EU. It defines four types — 2.1, 2.2, 3.1 and 3.2 — that differ in whether they contain actual test results for the material you received and who signs them off. The certificate type, not the word "certificate", is what tells you how much assurance you actually have.
What is the difference between EN 10204 2.1, 3.1 and 3.2?
Type 2.1 is a declaration of compliance with the order, with no test results. Type 2.2 is a test report quoting results from non-specific (general production) testing, not your material. Type 3.1 is an inspection certificate with the actual test results for the material supplied, validated by the manufacturer's independent quality department. Type 3.2 is the same as 3.1 but additionally witnessed and co-signed by an independent third party — SGS, Bureau Veritas, Lloyd's, TÜV, DNV or the purchaser's own inspector. Assurance rises from 2.1 to 3.2.
Which certificate type do I need for a lifting anchor?
For a load-bearing lifting or fixing anchor, EN 10204 3.1 is the working minimum, because it reports the actual mechanical and chemical results for the material you are buying, traceable to a heat number. 2.1 and 2.2 are appropriate only for non-critical, non-load-bearing items. Move up to 3.2 — third-party witnessed — for the highest-consequence lifting components or where your own client or code demands independent verification. When a purchase order simply says "MTC required", 3.1 is the type normally expected.
What is a heat number and why does it matter?
A heat (or cast) number identifies the specific batch of steel a component was made from, and it links the physical part to the test results on its certificate. Heat-number mismatches — where the number on the certificate does not match the number marked on the material — are a leading cause of traceability failure at incoming inspection. Some are clerical errors at the mill or from re-marking during processing; the serious ones are the deliberate application of a good certificate to non-conforming material. Always check the heat number on the parts against the heat number on the certificate.
What is the most common problem with certificates from low-end suppliers?
Incomplete certificates. Suppliers who issue documents with minimum data fields commonly omit required values — Charpy impact data where specified, or full chemical analysis. A certificate that does not report all the values your specification requires is not compliant, even if every value it does report is within specification. Read the certificate against your spec line by line; a missing row is a failed certificate, not a formatting quirk.
When should I ask for the mill certificates?
Before the goods leave the factory — not after they arrive. Chasing missing paperwork while material sits idle at the port costs demurrage and storage and delays the project, and it removes your leverage: once you have paid and taken delivery, a supplier has far less incentive to produce a document they should have had ready. Make the certificates a condition of shipment in the purchase order, and confirm you have reviewed and accepted them before release.
Do I still need pre-shipment inspection if I have a 3.1 certificate?
For safety-critical anchors, yes — they answer different questions. A 3.1 certificate tells you the steel's properties from testing; a pre-shipment inspection tells you that the parts in the boxes are the right parts, correctly made, correctly marked and correctly counted, and that the certificate actually corresponds to them. Paper and product are verified separately. For lifting components a third-party pre-shipment inspection, or a 3.2 certificate, closes the gap between the two.
How do I tell a real manufacturer from a trading company?
Ask questions only a manufacturer can answer with its own records: the forging route and heat-treatment logs for the anchor, the batch or lot test records, the in-house QC stages, and photos or a video call of the actual production line and testing equipment. A trading company can forward a certificate but cannot produce the process records behind it, and often cannot connect a specific certificate to a specific production batch. Buying direct from the manufacturer keeps the paper and the product under one roof.
References
Buying precast anchors direct from the factory?
20+ years of export experience, manufacturer not trader. EN 10204 3.1 certificates as standard on load-bearing anchors, heat-number traceability, and third-party pre-shipment inspection on request. Ask us for the numbers before you order — that's the whole point.
