Products · Silicon steel
Electrical Steel ProductsCRGO, CRNGO & ultra-thin silicon steel
Grain-oriented, non-oriented and ultra-thin silicon steel from 0.05 to 0.65 mm — low-core-loss magnetic materials for transformer cores, motor laminations and high-frequency applications, supplied worldwide from Wuxi, China.
Definitions
What is electrical steel?
Electrical steel — also called silicon steel, lamination steel or transformer steel — is a low-carbon iron alloy with roughly 0.5–3.5% silicon, cold-rolled into thin sheet and stacked into cores. The silicon raises electrical resistivity, so the steel carries magnetic flux with far less energy lost as heat than ordinary carbon steel. It comes in three families, separated by how the crystal grains are aligned and how thin the strip is rolled.
Grain-oriented (CRGO)
Silicon steel rolled and annealed so its grains line up with the rolling direction, giving the lowest core loss when flux travels along that one axis — the standard core material for transformers.
Definition & grades →Non-oriented (CRNGO)
Silicon steel with randomly oriented grains, so magnetic properties are near-identical in every direction — the choice for motors, generators and compressors, where the field rotates.
Definition & grades →Ultra-thin strip
Silicon steel rolled to 0.05–0.20 mm so eddy-current loss stays low above 400 Hz — used in high-frequency transformers, reactors and high-speed traction motors. Available grain-oriented and non-oriented.
Definition & gauges →Laminations & cores
A lamination is one stamped sheet of electrical steel; insulated laminations stacked into a core stop eddy currents circulating through the steel block. We supply coil, sheet, slit strip and finished laminations.
Forms we supply →Not sure which family your spec belongs to? Send the grade — we cross-reference GB, EN, JIS and AISI grades and confirm the equivalent in 24 hours.
Three product lines
Choose by how the magnetic field moves
The core distinction is grain orientation. Pick the line that matches your application, then drill into thickness and grade.
Grain-oriented · CRGO
Grain-Oriented Silicon Steel
Directionally rolled for the lowest loss along the grain — the core material for power and distribution transformers.
- Thickness0.23–0.35 mm
- Core loss P1.7/50≤ 0.90 W/kg
- Induction B8≥ 1.88 T
Non-oriented · CRNGO
Non-Oriented Silicon Steel
Uniform magnetic properties in every direction — for rotating machines where the field turns through a full 360°.
- Thickness0.35–0.65 mm
- Core loss P1.5/50≤ 2.5 W/kg
- Induction B50≥ 1.70 T
Ultra-thin · high-frequency
Ultra-Thin Silicon Steel
Gauges down to 0.05 mm to cut high-frequency loss. Supplied in two types — choose by application:
- Ultra-thin grain-orientedHF transformers, reactors · GT-050→
- Ultra-thin non-orientedEV & high-speed motors · 0.10 mm→
Side by side
Which grade family fits your core
A quick comparison to help you self-select before you send an enquiry.
| Property | Grain-oriented (CRGO) | Non-oriented (CRNGO) |
|---|---|---|
| Thickness | 0.23–0.35 mm | 0.35–0.65 mm |
| Core loss | ≤ 0.90 W/kg (1.7T/50Hz) | ≤ 2.5 W/kg (1.5T/50Hz) |
| Magnetic induction | B8 ≥ 1.88 T | B50 ≥ 1.70 T |
| Grain structure | Aligned (anisotropic) | Random (isotropic) |
| Best for | Transformer cores | Rotating motors |
Need a thinner gauge? Ultra-thin silicon steel comes in both grain-oriented and non-oriented, optimised for high-frequency use — see the ultra-thin range →
By grade & standard
Every coil to GB, EN, JIS or AISI
We supply the full grade range across all four standard systems — grain-oriented and non-oriented. Working from a European or Japanese spec? Use the cross-reference to find the Chinese equivalent.
Equivalents, at a glance
Supply range
Coil dimensions, tolerance and capacity
What we can actually roll, slit and load — confirmed figures from our standard CRGO and CRNGO lines; check your line’s constraints before you send a spec.
| Coil parameter | Grain-oriented (CRGO) | Non-oriented (CRNGO) |
|---|---|---|
| Thickness | 0.23 / 0.27 / 0.30 / 0.35 mm | 0.35 / 0.50 / 0.65 mm |
| Thickness tolerance | ± 4% of nominal | ± 0.02 mm |
| Coil width | 8–1,250 mm, slit to your width | 8–1,250 mm, slit to your width |
| Width tolerance | ± 1.0 mm on slit strip | ± 1.0 mm on slit strip |
| Coil weight | Approx. 5 t per coil | Approx. 3–8 t per coil |
| Coil inner diameter | 508 mm (20″) standard, 610 mm on request | 508 mm (20″) standard, 610 mm on request |
| Surface insulation | C5 inorganic (standard) · C6 inorganic-organic on request | C5 inorganic (standard) · C6 inorganic-organic on request |
| Standards | GB/T 2521 · EN 10107 · JIS C 2553 · AISI M-series | GB/T 2521 · EN 10106 · JIS C 2552 · AISI M-series |
Ultra-thin strip runs to a separate window: 0.05–0.20 mm thickness, ±0.015 mm thickness tolerance, ±0.1–0.3 mm width tolerance on slit strip — see the ultra-thin range →
Annual capacity is approximately 200,000 t across all three lines, supporting both spot coils and scheduled contract tonnage.
Sourcing from China
A silicon steel mill and exporter, not a trading desk
We roll, slit, anneal and coat in Wuxi, Jiangsu, and handle export documentation ourselves — so the grade you approve on the sample is the grade that leaves the plant, and one team owns the order from spec to bill of lading. Transformer and motor makers across Europe, the Americas, Southeast Asia and the Middle East buy on repeat contracts as well as spot coils.
Supplier facts, at a glance
By form
Supplied the way your line runs
01
Coil
Master coils and mill-edge coils to your inner diameter and weight.
02
Sheet
Cut-to-length sheet in standard and custom dimensions.
03
Slit strip
Precision slit to width with tight tolerance for stamping.
04
Laminations
Stamped transformer and motor laminations to drawing.
By application
Matched to what you’re building
Power transformers
Low-loss Hi-B CRGO for large power cores.
Explore →Distribution transformers
Balanced loss and cost for distribution cores.
Explore →EV traction motors
High-strength, low-loss non-oriented steel.
Explore →High-frequency transformers
Ultra-thin gauges for HF cores and reactors.
Explore →How we work
From enquiry to your dock
A simple path from spec to delivery, built for overseas buyers.
Send your spec
Grade, thickness, width and coating — or upload a drawing.
Quote in 24h
Pricing and availability within one business day.
Free samples
Test core loss and stampability, usually within a week.
Production & QC
Rolled, slit and tested to grade, with a mill certificate.
Export delivery
Moisture-proof packing and ocean freight to your port.
FAQ
Sourcing silicon steel from us
What is electrical steel, and is silicon steel the same thing?
Yes — electrical steel, silicon steel, lamination steel and transformer steel all name the same material: a cold-rolled iron alloy with about 0.5–3.5% silicon, used as the magnetic core of transformers, motors and generators because it carries flux with very little energy lost as heat. It splits into grain-oriented (CRGO), non-oriented (CRNGO) and ultra-thin grades.
Are you a manufacturer or a trading company?
We are a manufacturer and direct exporter based in Wuxi, Jiangsu Province. Rolling, slitting, annealing, laser scribing and coating are done in house, and a mill test certificate ships with every coil. Export paperwork is handled by our own team rather than an agent.
What coil sizes and weights do you supply?
Standard coils run 508 mm inner diameter (610 mm on request), slit to width from 8–1,250 mm. Coil weight is around 5 t for CRGO and roughly 3–8 t for CRNGO; ultra-thin strip ships in smaller coils. Tell us your decoiler limits and we’ll match ID and weight.
What is your annual capacity, and can you support a long-term contract?
Capacity is around 200,000 tonnes a year across grain-oriented, non-oriented and ultra-thin lines. That supports both one-off coils and annual contract tonnage — send your target volume and we’ll confirm what’s workable.
What’s the difference between grain-oriented and non-oriented silicon steel?
Grain-oriented (CRGO) steel is rolled so its grains align on one axis, giving the lowest loss where flux runs one way — transformer cores. Non-oriented (CRNGO) steel has random grains, so it performs the same in every direction — for motors and generators where the field rotates.
How do I choose the right grade for my transformer or motor?
Start with how the field moves — one axis points to CRGO, a rotating field to CRNGO — then pick thickness by frequency and grade by whether loss, cost or strength matters most. Send us the application and we’ll recommend a grade and gauge.
Can you match a specific grade, like M400-50A or 50W470?
Yes — we supply across GB, EN, JIS and AISI, and can cross-reference your grade to the Chinese equivalent. Send the grade or a datasheet and we’ll confirm the match and quote.
What’s the minimum order quantity?
MOQ depends on grade, thickness and width. Tell us your target volume and we’ll confirm what’s workable — trial quantities are possible for new projects.
How fast can you quote and ship?
Quotes come within 24 hours. Common grades often ship from stock in days; made-to-order runs and non-standard widths typically take a few weeks.
Do you provide samples?
Yes — free samples are usually ready within about a week, so you can test the material before committing.
Which standards and certifications do you hold?
Production runs under ISO 9001 and IATF 16949, with material to GB, EN, JIS or AISI grades and RoHS / REACH compliance. A mill test certificate ships with every order.
Can you cut to my sizes?
Yes — precision slitting to width, cut-to-length sheet, and stamped laminations to your drawing.
How do you handle export?
Seaworthy, moisture-proof packaging on coils or pallets, shipped to any port. We’ll align on payment terms at the order stage.
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.
Send your spec — get a quote in 24 hours
Share grade, thickness, width and coating, or upload a drawing. Free samples available.
