A general trading company based in the UAE came to us for 400 tons of grain-oriented electrical steel — 200 tons at 0.23mm and 200 tons at 0.27mm, both to EN 10107 — to supply the transformer manufacturers it sells to across the Gulf.
This profile covers how that order came together: a specification pitched at the high-permeability end of EN 10107, a sourcing decision built around a private mill relationship rather than a big-name mill label, and a pricing basis that moved from FOB Shanghai to EXW once the buyer’s own forwarder took over the collection.
Core Key Points
- 400 tons of EN 10107 CRGO coil for a UAE trading company — 200 tons at 0.23mm and 200 tons at 0.27mm — supplying the buyer’s own transformer-manufacturer customers across the region.
- Loss ceilings written to the high-permeability (P-grade) end of EN 10107: 0.85 W/kg at 0.23mm and 1.00 W/kg at 0.27mm, both at 1.7T/50Hz, with B800 at 1.85T and 1.88T.
- Core loss verified by SST (single-sheet tester), per the buyer’s own incoming-inspection method, with no welded joints accepted on any coil.
- Material sourced against a private-mill relationship rather than a major-mill label, verified coil by coil against heat number and backed by our own export test report.
- Pricing finalized on an EXW basis once the buyer confirmed their own forwarder would handle collection and export clearance from our facility, rather than FOB Shanghai.
- Coils packed to standard seaworthy export spec — moisture-barrier wrap, edge protection, radial and axial banding — sized to the buyer’s 508mm coil ID and 3–5 ton coil weight.
Customer Requirements
The buyer is a trading company, not a transformer manufacturer itself — it aggregates demand from several core makers it supplies and buys in the volumes that lets it hold a price position with them. That shows up in the specification: it reads like it was handed down from an end user with a finished core design, not written by a generalist trader.
| Specification | Customer Requirement |
|---|---|
| Product | Cold-rolled grain-oriented electrical steel (CRGO) coil |
| Standard | EN 10107 |
| Item 1 — thickness / quantity | 0.23mm / 200 tons |
| Item 2 — thickness / quantity | 0.27mm / 200 tons |
| Max total loss (Item 1) | 0.85 W/kg at 1.7T, 50Hz |
| Max total loss (Item 2) | 1.00 W/kg at 1.7T, 50Hz |
| Min magnetic polarization B800 | 1.85T (0.23mm) / 1.88T (0.27mm) |
| Min stacking factor | 0.945 (0.23mm) / 0.95 (0.27mm) |
| Core-loss test method | SST — single-sheet tester |
| Coil width | 960–1150mm; approx. 50% in 1000mm and 1150mm |
| Coil ID / weight | 508mm / 3–5 tons per coil |
| Welds | None permitted on any coil |
| Documentation | Sample MTC for evaluation; full mill report before shipment |
| Delivery terms | EXW, buyer’s forwarder collects |
The detail that told us the most about this buyer wasn’t the tonnage — it was that the spec named a test method. Most traders pass along a grade and a loss figure; specifying SST over the Epstein frame means the buyer’s own end customer runs its incoming lab a particular way, and the paperwork has to match it or the shipment gets flagged on arrival regardless of how good the steel actually is.
Why the Specification Reads Like a Hi-B Order
EN 10107 covers both conventional grain-oriented steel and the high-permeability grades, and this order sits at the high-permeability end. The loss ceilings — 0.85 W/kg at 0.23mm and 1.00 W/kg at 0.27mm, both at 1.7T/50Hz — are noticeably tighter than a conventional EN 10107 coil at the same gauge, which typically runs closer to 1.0–1.05 W/kg. B800 at 1.85–1.88T backs that up: conventional grain-oriented steel usually lands nearer 1.78–1.82T.
In the North American shorthand this pair maps roughly to Hi-B-class M3 and M4 — 0.23mm and 0.27mm grain-oriented grades with a defined maximum core loss. A supplier who quotes a cheap price against this spec and ships conventional coil instead isn’t offering a discount; they’re substituting the product, and the buyer’s own core-loss test will catch it the first time a coil is checked.
Two Grades, One Order
Splitting the order 50/50 between 0.23mm and 0.27mm rather than buying a single gauge tells us the buyer is supplying more than one downstream core design — thinner material where efficiency matters most, the heavier gauge where the cost-to-performance balance favors it. Consolidating both into one purchase from one supplier means one qualification, one mill relationship, and one document set covering both grades, instead of running two separate sourcing efforts.
That consolidation is also what let us sharpen the price once the full 400-ton figure was on the table rather than a smaller opening quantity — a single mill booking at that volume prices differently than two smaller ones spread across the year.
Sourcing and Production
We don’t roll grain-oriented steel ourselves — no trading house or processor at our scale does. What we control is which mill the coil comes from and how tightly we manage everything downstream of that.
For this order, coil came from a private Chinese mill rather than one of the large state-linked producers. In the domestic grain-oriented market there’s a real spread between the two: the big groups carry more name recognition, while a set of private mills — this one among them — can produce genuine high-permeability material at a sharper price, provided the buyer’s supplier verifies it properly rather than taking the mill’s word for it. That verification is the job we do: every incoming coil is checked against its mill certificate by heat number before it’s accepted into an order, and we issue our own export test report alongside the mill’s — because a domestic mill certificate is usually scoped to the Chinese market, and the document that has to carry responsibility across the border needs to be ours. For buyers who’d rather source from a named major mill, we quote standard CRGO from those producers too, at the corresponding price.
The buyer asked directly whether we were the original manufacturer, and we gave them the accurate answer rather than a convenient one: we’re an authorised supplier working directly with qualified mills, not the rolling mill itself. That distinction mattered enough to the buyer that they asked for a company profile, quality certificates, and a sample mill test certificate before committing — a reasonable ask on a first order of this size, and one we could answer without hedging, because incoming verification and export documentation are exactly the parts of the process we own.
One line in the spec is easy to skim past and shouldn’t be: no welded joints on any coil. Mills sometimes weld two shorter strips together to build a full-weight coil, and the weld produces a defective lamination the moment it reaches a stamping die or a winding head. We confirmed weld-free material against this order rather than leaving it assumed, because on a spec this tight, an unanswered line is where a dispute starts after delivery.
Quality Inspection
Every coil against this order carries a mill test certificate tied to its heat number, plus our own export test report, and both are checked against the buyer’s SST-based acceptance criteria before dispatch.
| Test | Standard | What It Confirms |
|---|---|---|
| Specific core loss | SST (single-sheet tester) | Actual W/kg against the 0.85 / 1.00 ceilings |
| Magnetic polarization (B800) | IEC 60404-2 | Directional magnetic performance against 1.85T / 1.88T |
| Stacking factor | IEC 60404-2 | Lamination efficiency against 0.945 / 0.95 |
| Width and coil dimensions | Laser gauge, per coil | Tolerance against the 960–1150mm width range and 508mm ID |
| Weld inspection | Visual, full-length | Confirms no welded joints on any coil |
| Surface quality | Visual + automated scan | Scratches, burrs, coating defects |
Testing to the SST method specifically — rather than substituting an Epstein-frame result and calling it equivalent — matters because the two methods don’t always agree to the last decimal on the same material. A buyer whose own incoming lab runs SST wants a certificate on the same basis, so the numbers reconcile without an argument about methodology.
Where a buyer wants a further independent pass on top of the mill certificate and our own export report, our supplier verification process covers the additional checks worth running — including third-party inspection — before committing to a new relationship at this volume.
Packaging and Export
The order specifies standard seaworthy export packing, sized to a 508mm coil ID and 3–5 ton coil weight: an inner moisture-barrier wrap, an outer weatherproof layer, edge protection at the coil faces, and radial and axial banding, with coils then blocked and braced inside the container.
Pricing on this order was finalized on an EXW basis rather than FOB Shanghai, at the buyer’s request. The difference is what each term includes: FOB covers inland haulage to the load port, terminal handling, and export customs formalities on top of the goods themselves, while EXW stops at making the coil available at our facility. A trading company with its own forwarder and export-clearance process at the origin — as this buyer has — can usually run that leg more cheaply and with more control than paying us to build it into the price. Our guide to Incoterms for steel imports covers where responsibility and cost actually sit under FOB, EXW, and CIF, which is worth reading before a buyer assumes one term is simply cheaper than another.
We still handle the physical loading and the packing spec regardless of which Incoterm is on the paperwork — a coil that shifts during the sea leg arrives with edge damage no matter whose responsibility the export leg technically was, so the dunnage and bracing get the same attention on an EXW shipment as on an FOB one.
Why Buyers Choose Zhongxin
An honest answer on what we are. We’re an authorised supplier with direct mill relationships, not the rolling mill — and we say so upfront, backed by the company profile, quality certificates, and sample MTC a buyer asks for, rather than letting a factory-audit request expose a gap later.
A quote that answers every line in the spec. SST test method, weld-free confirmation, per-grade stacking factor, coil ID and weight, sample-MTC availability — each requirement the buyer wrote gets an explicit answer, not a generic grade sheet.
Verified sourcing on private-mill material. Incoming coil is checked against its mill certificate by heat number, and we issue our own export test report alongside it, so a sharper private-mill price doesn’t mean an unverified product.
Pricing and Incoterms matched to how the buyer actually operates. We quote FOB, EXW, or CIF and explain what each shifts onto the buyer’s side, rather than defaulting to whichever term is easiest for us.
Two grades, one accountable supplier. Consolidating both thicknesses into a single order and a single document set means the buyer qualifies one relationship instead of managing two separate sourcing efforts for the same core program.
For a buyer weighing a first order with us at this volume, the checks worth running before a relationship like this one gets underway are the same ones covered earlier — the manufacturer question, heat-number traceability, and an export test report on top of the mill’s own certificate.
FAQ
What is the difference between a 0.23mm and a 0.27mm CRGO coil in a transformer core?
Thinner grain-oriented steel has lower eddy-current loss, so a 0.23mm core runs cooler and more efficiently than a 0.27mm core of the same grade, at a higher price per ton and with more laminations to stack per core. Many buyers order both: 0.23mm where efficiency rules are tightest, 0.27mm where the cost-to-performance balance favors it — which is why this order split the tonnage evenly between the two.
Why would a trading company specify a core-loss test method instead of just a grade?
Because its own end customer’s incoming-inspection lab is set up to test a particular way — SST or Epstein frame — and a certificate on the wrong basis can flag a shipment as non-compliant even when the material is genuinely on spec. Naming the test method up front avoids that mismatch.
Is buying from an authorised supplier instead of the mill directly a worse choice?
Not inherently. Mills sell in mill-scale lots, certify to the domestic market, and generally aren’t set up to manage a consolidated export order with incoming verification and destination-matched packing. An authorised supplier handles sourcing, incoming QC, export testing, and shipment as one accountable counterparty — the risk to watch for is a broker with no real mill relationship, which is exactly what a buyer’s manufacturer-verification questions are meant to catch.
Why did the price come out lower when the buyer moved from FOB to EXW?
Because FOB includes moving the goods to the load port, terminal handling, and export customs clearance, and EXW does not — those costs and tasks shift to the buyer’s own forwarder. It isn’t a discount so much as a different split of who does what; a buyer with its own logistics capability at the origin, like this one, is usually better off taking that on directly.
What does “no welding points on any coil” mean and why does it matter?
Mills sometimes weld shorter strips together to build a full-weight coil, and the weld creates a defective lamination the moment it reaches a stamping die or winding head — causing scrap or a machine stop. Buyers running fast tooling require continuous, weld-free coil, which is why it’s worth confirming explicitly rather than assuming.
How do you verify private-mill material is genuinely on spec?
Every incoming coil is checked against its mill test certificate by heat number, and we issue our own export test report alongside the mill’s — the mill’s data is real and unaltered, but the document that carries responsibility for an export shipment is ours. A buyer who wants a further independent pass can add third-party inspection on top.
Can an order like this be split across more than one grade without a quality tradeoff?
Yes, provided each grade is tested and documented separately rather than folded into one averaged report — that’s what catches a single grade drifting toward its loss ceiling while the order as a whole still looks compliant. It’s standard practice on a two-grade order like this one.
Lessons for Buyers Sourcing CRGO Through a Trading Intermediary
A few things about this order generalize to any buyer consolidating a CRGO purchase through a trading company rather than direct from a manufacturer.
Specify the test method, not just the loss figure. If your own incoming inspection runs a particular way, say so on the RFQ — it avoids a certificate that technically meets the grade but doesn’t match how you’ll actually check it.
Ask the manufacturer question, and expect a straight answer. A supplier who says plainly that they’re an authorised trader with a mill relationship, rather than claiming to be the mill, is giving you more useful information — and is the one worth following up with for heat-number traceability and an export test report.
Consolidate volume and grades where it makes sense. Buying two thicknesses from one supplier under one qualification is usually simpler and cheaper than splitting the order across two relationships for the same program.
Choose the Incoterm to match your own logistics, not the lowest headline price. EXW shifts real work — collection, export clearance — onto you. It’s the right call if you already have a forwarder who can run that leg; otherwise FOB or CIF is worth the difference.
Confirm weld-free material explicitly on a tight spec. It’s a small line to write into an RFQ and a real defect to discover on your own production floor if it’s missed.
Bottom Line
A 400-ton CRGO order split evenly between 0.23mm and 0.27mm, both pushed to the high-permeability end of EN 10107, is a demanding spec for a trading company to place — which is exactly why the buyer ran a tight verification process before committing: a straight answer on who the manufacturer actually is, a named test method, and an Incoterm switched to match its own logistics setup.
For a buyer weighing whether a trading intermediary can deliver the same assurance as buying direct from a mill, the answer here came down to documentation and honesty rather than price alone — verified sourcing, a certificate on the buyer’s own test basis, and a supplier willing to say plainly what role it actually plays in the supply chain.
