Cold Rolled Non-Oriented Silicon Steel CRNO Sheet

Cold Rolled Non-Oriented Silicon Steel (CRNO) Sheet

Omni-directional consistent magnetism, stable performance under rotating alternating magnetic field.
Diversified thickness & grade options, match common motors and high-speed efficient motors separately.
Smooth surface with uniform inorganic insulating coating, suppress eddy current loss effectively.
Superior punching & lamination performance, suitable for high-speed automatic stamping production.
Wide iron loss range covers cost-effective household appliances & high-efficiency new energy equipment demands.

Product Overview

Cold Rolled Non-Oriented Silicon Steel (CRNO) Sheet is a soft magnetic electrical steel widely used as a core material for rotating electrical equipment. Unlike grain-oriented silicon steel, its silicon crystal grains are randomly distributed without a fixed directional arrangement, providing relatively consistent magnetic properties and iron-loss performance in different directions. The material is produced in accordance with GB/T2521.1, IEC 60404, EN 10106, JIS C2552 and ASTM A677 standards.

The product range covers the mainstream 0.5 mm 50WW/B50 series and thinner 0.35 mm 35WW/B35 series, with thickness options from 0.10–0.50 mm. Representative grades include 50WW250, 50WW310, 50WW470, 50WW600, 50WW800, 50WW1000, B50A470, B50A600, 35WW230, 35WW250 and B35A230. Different grades and thicknesses can be selected according to motor efficiency, core design and production requirements.

A uniform inorganic insulating coating is applied to the steel surface to separate individual laminations and help suppress eddy-current losses during operation. The substrate also offers good ductility and punching performance, making CRNO electrical steel suitable for high-speed progressive stamping and automated production of stator and rotor laminations.

Raw coil widths include 1000 mm, 1200 mm and 1250 mm, with longitudinal slitting, fixed-size shearing and stamping blanking available according to customer drawings. Typical applications include industrial motors, servo motors, household appliance motors, new energy vehicle drive motors, generators, energy-storage inductors and power-tool motors. Magnetic test certificates and factory mill reports can be supplied with finished batches.

Cold Rolled Non-Oriented Silicon Steel (CRNO) Sheet

Chemical & Mechanical Property Snapshot

Grade	Si (wt%)	C (wt%)	Mn (wt%)	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Core Loss P15/50 (W/kg)
0.50mm Series
50WW250	2.8–3.2	≤0.005	0.2–0.4	≥450	≥280	≥22	≤2.50
50WW310	2.7–3.1	≤0.005	0.2–0.4	≥440	≥270	≥23	≤3.10
50WW470	2.4–2.8	≤0.005	0.2–0.5	≥420	≥250	≥24	≤4.70
50WW600	2.0–2.5	≤0.008	0.3–0.6	≥400	≥240	≥25	≤6.00
50WW800	1.6–2.0	≤0.010	0.3–0.7	≥380	≥220	≥26	≤8.00
50WW1000	1.3–1.7	≤0.012	0.4–0.8	≥360	≥210	≥27	≤10.00
B50A470	2.4–2.8	≤0.005	0.2–0.5	≥420	≥250	≥24	≤4.70
B50A600	2.0–2.5	≤0.008	0.3–0.6	≥400	≥240	≥25	≤6.00
0.35mm Series
35WW230	2.8–3.2	≤0.004	0.2–0.4	≥460	≥290	≥20	≤2.30
35WW250	2.8–3.2	≤0.004	0.2–0.4	≥455	≥285	≥21	≤2.50
B35A230	2.8–3.2	≤0.004	0.2–0.4	≥460	≥290	≥20	≤2.30

Detailed Technical Specifications

Item	Specification
Product	Cold Rolled Non-Oriented Silicon Steel (CRNO) Sheet
Alternative Name	Non-Grain Oriented Electrical Steel
Standards	GB/T2521.1, IEC 60404, EN 10106, JIS C2552, ASTM A677
Overall Thickness Range	0.10–0.50 mm
Main Series	50WW/B50, 35WW/B35
0.50 mm Series	50WW250, 50WW310, 50WW470, 50WW600, 50WW800, 50WW1000, B50A470, B50A600
0.35 mm Series	35WW230, 35WW250, B35A230
Thin-Gauge Option	0.10–0.27 mm for precision micromotor applications
Raw Coil Width	1000 / 1200 / 1250 mm
Surface Treatment	Uniform inorganic insulating coating
Magnetic Structure	Non-oriented grain structure
Processing Options	Longitudinal slitting, fixed-size shearing, stamping blanking
Processing Performance	Good ductility and punching performance
Quality Documents	Magnetic test certificates and factory mill reports
MOQ	5 Ton
Payment Terms	T/T, L/C at Sight
Delivery Time	7–15 working days after receiving deposit
Package	Waterproof paper + plastic film + wooden pallet, seaworthy export packing

Product Comparison Table

Comparison Item	50WW / B50 Series	35WW / B35 Series
Typical Thickness	0.50 mm	0.35 mm
Representative Grades	50WW250, 50WW310, 50WW470, 50WW600, 50WW800, 50WW1000, B50A470, B50A600	35WW230, 35WW250, B35A230
Material Focus	Balanced magnetic performance and cost	Lower iron loss and thinner gauge
Typical Applications	Three-phase asynchronous motors, fan and water-pump motors, household appliance motors	High-speed servo motors, air-conditioner compressor motors, NEV drive motors
Design Direction	General motor manufacturing	Higher efficiency and miniaturization
Processing	Slitting, shearing and stamping blanking	Slitting, shearing and stamping blanking
Suitable Buyer Requirement	Conventional motor-core production	High-efficiency or compact motor-core production

App Market

Reliable Steel Coil Solutions For Diverse Industrial Applications

Industrial Motor

Appliance Motor

The field of new energy

Power generation equipment

Product Packaging

Secure Export Packaging For Safe Handling And Delivery

Cold Rolled Non-Oriented Silicon Steel (CRNO)

FAQs

What is Cold Rolled Non-Oriented Silicon Steel (CRNO) Sheet used for?

Cold Rolled Non-Oriented Silicon Steel (CRNO) Sheet is mainly used for rotating electrical equipment, including industrial motors, servo motors, household appliance motors, generators and new energy vehicle drive motors.

What thicknesses are available for CRNO sheet?

The overall supplied thickness range is 0.10–0.50 mm. The main product series include 0.50 mm 50WW/B50 and 0.35 mm 35WW/B35, with thinner options available for precision applications.

What is the difference between 50WW/B50 and 35WW/B35?

The 50WW/B50 series is mainly positioned for conventional motor applications, while the thinner 35WW/B35 series is intended for applications requiring lower iron loss, higher efficiency or greater motor miniaturization.

Can CRNO sheet be slit according to motor-core drawings?

Yes. Longitudinal slitting, fixed-size shearing and stamping blanking can be provided according to customer drawings and finished stator or rotor sheet requirements.

What documents are supplied with CRNO material?

Magnetic test certificates and factory mill reports can be supplied with finished batches for material verification.

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Cold Rolled Non-Oriented Silicon Steel CRNO Sheet