Mill Test Certificate Analysis for Stone Pattern Printed Steel Coils
PPGI.LTD provides a stone pattern printed steel coil MTC test report when the order requires it. MTC means Mill Test Certificate. Use the report to check that the coil number, base metal, metal coating, paint, and size match your purchase order.
Does the Product Match Your Order?
Start with identity. A correct number means little if the report belongs to a different coil or specification.
| Purchase order detail | MTC field to find | What to check |
|---|---|---|
| Product and base metal | Product description | Prepainted galvanized steel (PPGI) or prepainted galvalume steel (PPGL) matches the order |
| Coil identity | Coil or batch number | Report and coil label match |
| Dimensions | Thickness and width | Units and ordered values match |
| Quantity | Weight or pieces | Shipment and report agree |
| Standard | Named material standard | Same standard used in the contract |
PPGI.LTD links the report to the order and coil identity. Buyers should compare the certificate with the signed purchase specification, not with a general website table.
How Do You Read the Coating and Paint Values?
Check the unit, side, method, and condition beside every test value. Similar words may describe different measurements.
| Report field | Read it as | Common check |
|---|---|---|
| Base metal thickness | Steel before paint layers | Do not confuse it with total thickness |
| protective metal coating amount | Coating weight for the stated sides | Check unit and order code |
| Paint thickness | Primer and top or back coats | Check the named side |
| Color | Approved color or pattern reference | Match the order sample |
| T-bend | A forming test under stated conditions | Do not treat it as every possible bend |
ISO 10474 defines inspection documents for steel products according to the order requirements. We state the ordered values and test results so the buyer can compare the certificate with the contract.
When Do You Need Third-Party Testing?
An MTC and an independent report serve different purposes. Choose the extra check from the order risk.
| Document | Main use | Important limit |
|---|---|---|
| Factory MTC | Records agreed production and test values | Covers the fields listed on it |
| Third-party witness | Confirms selected checks were observed | Scope must be agreed before production |
| Independent lab report | Tests submitted samples | Only proves the tested sample and method |
| Customs document | Supports the import file when required | Does not replace product acceptance |
PPGI.LTD can coordinate SGS, Bureau Veritas (BV), Intertek, or another agreed inspection company when it is written into the contract. Our quality-control page explains the wider inspection process; no certificate guarantees customs clearance.
Buyer Concern & FAQ
How do I read coating thickness on a PPGL MTC?
PPGL means prepainted aluminum-zinc coated steel. Check whether the report states protective metal coating amount, paint-film thickness, or total coated thickness, then read the unit and side.
Does an EN 10204 3.1 certificate prove every printed-surface property?
No. EN 10204 3.1 names a type of inspection certificate. It proves only the values and statements listed for the identified material.
Can third-party testing verify selected order values?
Yes. PPGI.LTD can coordinate agreed checks when the scope, timing, method, and acceptance values are written into the order.
Does an MTC guarantee customs clearance?
No. Customs requirements depend on the shipment, destination, product code, and current rules. An MTC is a material record, not a clearance guarantee.
