Test Reports & Inspection
Every batch of Zhongbo galvanized steel wire and strip can ship with a mill test certificate recording its measured results. For supplied cable and metal materials, the mill or manufacturer documentation is provided from the confirmed source. Below is what a mill test certificate contains, our test methods, and how to arrange independent inspection before shipment. For ISO and company certificates, see Certificates & Credentials.
Certificates vs. test reports
These are two different documents. Company certificates — ISO 9001, 14001 and 45001, the business licence and awards — prove how Zhongbo is run and audited; they live on the Certificates & Credentials page.
A mill test certificate (this page) is a per-shipment test report — it records the measured results for your specific batch so they can be checked against your order and the standard.
What a mill test certificate contains
A mill test certificate (MTC) travels with the goods and records the actual measured results for that batch, so it can be checked against your purchase order and the standard. A typical Zhongbo MTC lists:
- Wire diameter or strip dimensions, with tolerance
- Tensile strength and elongation
- Zinc-coating weight (g/m²) and the adhesion result
- The standard the material was made and tested to
- Batch / heat number for traceability
Sample mill test certificate
Illustrative — format onlyThe layout below shows the test items and units a Zhongbo mill test certificate records for hot-dip galvanized steel wire. Actual values are measured per heat / batch and issued against your order; buyer-sensitive data is redacted on shared samples.
| Test item | Unit | Method / standard | Example result |
|---|---|---|---|
| Wire diameter | mm | Calibrated micrometer / order tolerance | e.g. 2.50 ± 0.05 |
| Tensile strength | MPa | ISO 6892-1 | e.g. 1180 |
| Elongation (A100) | % | ISO 6892-1 | e.g. 4.2 |
| Zinc-coating mass | g/m² | ISO 1460 / ASTM A90 | e.g. 245 |
| Coating adhesion | pass / fail | ISO 7989-2 (wrap test) | e.g. pass |
| Heat / batch number | — | Traceability | e.g. ZB-2026-04-118 |
Sample third-party test reports
Accredited labs · CNAS / CMAIndependent inspection reports from CNAS/CMA-accredited national laboratories for Zhongbo galvanized steel wire and strip — dimensions, tensile strength, elongation, torsion and zinc-coating weight, each item measured and rated Pass. Click a report to view its cover and results; buyer-sensitive data is redacted on shared samples.
Our Quality-Control Process
Testing Equipment & Checks
Tensile Testing
Tensile strength and elongation measured to your standard.
Torsion Testing
Twist / torsion performance of the galvanized wire.
Wrap Testing
Zinc-coating adhesion checked with a mandrel wrap test.
Hydraulic / Universal Testing
Mechanical testing across a range of loads.
Third-Party Inspection
Buyers can verify quality before shipment through independent agents or their own inspectors — with full documentation and remote options for overseas customers.
Pre-shipment inspection checks the finished goods against your order — dimensions, coating, packing and quantity — before the container is loaded, so any problem is caught at the factory rather than on arrival. We routinely work with SGS, BV and other customer-designated agents, and can arrange sample or witnessed testing and photo or video records where a buyer cannot attend in person.
- SGS / BV / customer-designated inspection agents
- Pre-shipment inspection (PSI) before loading
- Sample and witnessed testing on request
- Photo & video inspection for remote buyers
Test reports & inspection questions
A Mill Test Certificate (MTC), zinc coating-mass report and tensile & elongation report for each batch, plus a full shipment document package. Sample or redacted reports are available on request.
More on quality: Quality Control & Testing · Packing & Shipping