Trust · Quality
ISO 9001 Certified QualityA certified quality management system, from raw coil to finished shipment
Wuxi Zhongxin Special Steel operates under an ISO 9001-certified quality management system. Every coil is tested in-house against its grade specification before it ships, with a mill test certificate issued per coil rather than a generic grade average.
ISO 9001:2015 — current certificate
The certificate itself
ISO 9001:2015 Quality Management System
Real, current certificate — copies are available on request for your supplier qualification file. The certification covers our quality management system for the manufacture and supply of electrical steel products: document control, corrective action, and process consistency from incoming material to finished shipment.
- ScopeManufacture & supply of electrical steel
- StatusCurrent, annual surveillance audit
- RecertificationMulti-year cycle, standard practice
What it actually means
Not just a logo on a datasheet
ISO 9001 doesn’t certify a product — it certifies the system that produces it. It governs document control, corrective action, and process consistency, so a coil made this month is held to the same checks as one made a year ago. In practice, that shows up as a mill test certificate traceable to the specific coil you receive, not a generic grade-average figure, and an annual surveillance audit that keeps the system honest rather than a one-time badge.
What we test
Every coil, tested before it ships
Standard parameters checked in-house against grade specification, referenced to the relevant GB/EN/JIS test method.
| Parameter | Method | What it confirms |
|---|---|---|
| Core loss (W/kg) | Epstein frame / SST | Energy lost per cycle at rated induction & frequency |
| Magnetic induction (T) | DC or AC permeameter | Field strength the material can carry before saturating |
| Thickness & lamination factor | Micrometer, stacking test | Dimensional consistency and effective steel fill in a core |
| Insulation coating resistance | Franklin tester | Interlaminar insulation quality, controls stray eddy loss |
| Mechanical properties | Tensile test | Yield strength for high-speed rotor applications |
Testing is performed in-house; a mill test certificate covering these parameters ships with every order. Third-party verification can be arranged on request — see the CRGO and CRNGO product pages for grade-specific figures.
In the lab
Where the testing happens
Real photos from our in-house test lab and production floor.
Core loss testing
Epstein Frame Test
Every batch is checked against its grade’s core-loss and induction specification before release.
In-house test lab
Test Laboratory
In-house lab covering core loss, induction, coating and mechanical testing on every production batch.
In-process inspection
In-Process Inspection
Coils are checked at multiple stages, not just at final test, to catch deviations before they compound.
From coil to certificate
How a mill test certificate gets issued
Every certificate traces back to a specific coil, not a generic grade average.
Incoming inspection
Raw material checked against the grade spec before production.
In-process testing
Core loss and induction sampled during rolling and annealing.
In-house final test
Finished coil tested against full grade spec before release.
Certificate issued
Mill test certificate generated per coil, shipped with the order.
FAQ
Certifications & quality
Which certifications does Zhongxin currently hold?
Zhongxin’s quality management system is ISO 9001:2015 certified, covering the manufacture and supply of our electrical steel products.
What does ISO 9001 certification actually mean for buyers?
It means our quality management system — document control, corrective action, process consistency — is independently audited on an annual basis, rather than being an internal claim. In practice you see it in a mill test certificate traceable to your specific coil.
Are you IATF 16949 certified?
Not currently — our quality system is ISO 9001 certified. If IATF 16949 is a requirement for your supplier qualification process, contact us to discuss your project.
Is your test lab CNAS-accredited?
Testing is performed in-house against grade specification on every coil; our lab does not currently hold CNAS accreditation. If third-party accredited testing is required for your order, let us know and we can discuss arranging it.
Do you provide a mill test certificate with every order?
Yes — every order ships with a mill test certificate covering core loss, induction, thickness and coating, traceable to the specific coil.
Can you provide the ISO 9001 certificate copy for our supplier qualification audit?
Yes — send a request through the downloads page or directly to our sales team and we’ll provide a current copy of the certificate.
Do you support on-site or remote supplier audits?
Yes — we can host supplier qualification audits for overseas buyers, both on-site and via video call. Contact us to schedule one.
What test standards do your published specs reference?
Core loss and induction figures are referenced to GB/T, JIS C, and equivalent EN test methods depending on the grade and standard system you’re specifying against.
How often is the ISO 9001 certification renewed or re-audited?
It’s subject to annual surveillance audits, with full recertification on a multi-year cycle — standard practice for the standard.
Why buyers choose Zhongxin
Mill-grade material, export-ready service
Wuxi Zhongxin Special Steel Co., Ltd. is a Chinese manufacturer and exporter of grain-oriented, non-oriented and ultra-thin silicon steel, serving transformer and motor makers across Europe, the Americas, Asia and beyond.
Need the certificate copy for your qualification file?
Request the current ISO 9001 certificate and mill test documentation, or send your spec for a quote.