35W300 CRNO Coil | JIS C 2552 Non-oriented Silicon Steel Coil

Manufactured to JIS C 2552 Japanese industrial standard, widely accepted by Japanese brand factories
Stable iron loss and magnetic induction batch to batch, suitable for mass production of motors
0.35mm gauge, good balance between loss performance and stamping formability
Precision slitting with tight width tolerance for automatic lamination lines
Environmentally friendly chrome-free insulation coating, meets RoHS and REACH requirements

Product Overview

35W300 CRNO coil is 0.35mm gauge non-oriented silicon steel produced in strict accordance with JIS C 2552 standard. It is a medium-loss general-purpose grade in the JIS silicon steel system, featuring balanced magnetic performance, good punchability and stable mechanical properties, and is one of the most widely used JIS grades in home appliance and industrial motor industries.

The product can be supplied with single-side or double-side inorganic insulation coating, which provides reliable inter-layer insulation and certain anti-rust ability. The original mother coil width is 1000-1250mm, and can be precision slit into 5-1240mm narrow strips according to customer’s lamination size requirements. The material has uniform grain structure and low burr after stamping, suitable for high-speed continuous stamping production.

35W300 is mainly used in household appliance motors, compressor motors, small industrial motors, micro motors and ordinary generator cores. We can provide supporting processing services such as flattening, stamping and laser cutting.

CRNO Coil

Chemical & Mechanical Property Snapshot

Grade	Si Content (%)	Iron Loss P₁.₅/₅₀ (W/kg)	Magnetic Induction B₅₀ (T)	Yield Strength (MPa)	Tensile Strength (MPa)	Elongation (%)
0.50 mm Series
50WW250	3.1–3.4	≤2.50	≥1.64	340	440	≥22
50WW310	3.0–3.3	≤3.10	≥1.65	330	430	≥23
50WW350	2.8–3.2	≤3.50	≥1.66	320	420	≥24
50WW400	2.7–3.1	≤4.00	≥1.67	310	410	≥24
50WW470	2.6–3.0	≤4.70	≥1.68	300	400	≥25
50WW600	2.4–2.8	≤6.00	≥1.69	280	380	≥26
50WW800	2.2–2.6	≤8.00	≥1.70	260	360	≥27
50WW1000	2.0–2.4	≤10.00	≥1.71	240	340	≥28
50WW1300	1.8–2.2	≤13.00	≥1.72	220	320	≥29
B50A250	3.1–3.4	≤2.50	≥1.64	340	440	≥22
B50A470	2.6–3.0	≤4.70	≥1.68	300	400	≥25
B50A600	2.4–2.8	≤6.00	≥1.69	280	380	≥26
B50A800	2.2–2.6	≤8.00	≥1.70	260	360	≥27
0.35 mm Series
35WW230	3.2–3.5	≤2.30	≥1.62	360	460	≥21
35WW250	3.1–3.4	≤2.50	≥1.63	350	450	≥21
35WW270	3.0–3.3	≤2.70	≥1.64	340	440	≥22
35WW300	2.9–3.2	≤3.00	≥1.65	330	430	≥22
35WW360	2.7–3.1	≤3.60	≥1.66	320	420	≥23
35WW400	2.6–3.0	≤4.00	≥1.67	310	410	≥23
B35A230	3.2–3.5	≤2.30	≥1.62	360	460	≥21
B35A300	2.9–3.2	≤3.00	≥1.65	330	430	≥22
B35A360	2.7–3.1	≤3.60	≥1.66	320	420	≥23
0.65 mm Series
65WW600	2.5–2.9	≤6.00	≥1.70	270	370	≥27
65WW800	2.3–2.7	≤8.00	≥1.71	250	350	≥28
Ultra-Thin High-Frequency Series
B20AHV800	3.3–3.6	≤8.00 (400 Hz)	≥1.55	410	520	≥15
B15AHV950	3.4–3.7	≤9.50 (400 Hz)	≥1.53	430	540	≥14
B10AHV900	3.5–3.8	≤9.00 (400 Hz)	≥1.50	450	560	≥12
ASTM Standard Grades
M250-50 / M19	3.1–3.4	≤2.50	≥1.64	340	440	≥22
M470-50 / M27	2.6–3.0	≤4.70	≥1.68	300	400	≥25
M600-50 / M36	2.4–2.8	≤6.00	≥1.69	280	380	≥26
M300-35	2.9–3.2	≤3.00	≥1.65	330	430	≥22
Semi-Processed Grades
SP50	1.8–2.3	Semi-processed (annealing required)	Semi-processed	230	330	≥28
SP35	2.8–3.3	Semi-processed (annealing required)	Semi-processed	330	430	≥22
Note: Semi-processed grades require customer-side stress-relief annealing to activate magnetic properties. HV series are tested at 400 Hz; all other grades are tested at 50 Hz / 1.5 T.

Detailed Technical Specifications

Item	Technical Specification
Product Name	35W300 CRNO Coil
Full Name	Cold-Rolled Non-Oriented Silicon Steel Coil
Standard	JIS C 2552
Representative Grade	35W300
Nominal Thickness	0.35 mm
Mother Coil Width	1000–1250 mm
Slitting Width Range	5–1240 mm
Slitting Width Tolerance	±0.005 mm
Coil Inner Diameter	508 mm
Single Coil Weight	1.5–7 tons
Insulation Coating	Single-side / double-side inorganic insulation coating
Environmental Coating	RoHS / REACH compliant chrome-free coating
Processing Services	Flattening, stamping, laser cutting, stress-relief annealing
Typical Applications	Home appliance motors, compressor motors, small industrial motors, micro motors
MOQ	5 Ton for standard mother coil; custom slitting MOQ subject to specification
Payment Terms	T/T, L/C at Sight
Packing	Waterproof kraft paper + galvanized steel strapping + seaworthy export wooden pallet
Trade Terms	FOB Qingdao, CFR, CIF, EXW optional
Delivery Time	7–15 working days after receiving deposit
Certificates	Mill Test Certificate (MTC); ISO, SGS, RoHS available upon request

Product Comparison Table

Thickness Category	GB WW Grade	Baosteel B+A Grade	JIS Grade	ASTM A677 Grade	Semi-Processed Grade	Typical Application
0.50 mm Ultra-Low-Loss Grade	50WW250	B50A250	50W250	M250-50 / M19	—	High-efficiency industrial motors, EV auxiliary motors
0.50 mm Mid-Low-Loss Grade	50WW310 / 50WW350	—	—	—	—	Energy-saving home appliance motors
0.50 mm General-Purpose Grade	50WW400 / 50WW470	B50A470	50W470	M470-50 / M27	—	General industrial motors, generator cores
0.50 mm Economic Grade	50WW600 / 50WW800 / 50WW1000 / 50WW1300	B50A600 / B50A800	—	M600-50 / M36	—	Low-power small motors, fan motors, pump motors
0.35 mm Ultra-Low-Loss Grade	35WW230 / 35WW250	B35A230	35W230	M300-35	—	High-speed motors, high-efficiency generators
0.35 mm Mid-Low-Loss Grade	35WW270 / 35WW300	B35A300	35W300	—	—	Compressor motors, new-energy drive motors
0.35 mm General-Purpose Grade	35WW360 / 35WW400	B35A360	—	—	—	Small generators, servo motors
0.65 mm Generator Grade	65WW600 / 65WW800	—	—	—	—	Large diesel generators, wind turbine cores
Ultra-Thin High-Frequency Grade	—	B20AHV800 / B15AHV950 / B10AHV900	—	—	—	EV drive motors, PCS energy-storage converters
Semi-Processed Grade	—	—	—	—	SP35 / SP50	Custom annealing projects, self-designed magnetic cores

App Market

Reliable Steel Coil Solutions For Diverse Industrial Applications

Industrial Motor

Appliance Motor

Power Generation & Energy Storage Equipment

Product Packaging

Secure Export Packaging For Safe Handling And Delivery

FAQs

Does 35W300 comply with JIS C 2552 standard?

Yes, 35W300 is produced strictly according to JIS C 2552 standard, and each batch is delivered with corresponding test data.

What is the iron loss value of 35W300?

The maximum iron loss P₁.₅/₅₀ is ≤3.00 W/kg, and the actual delivery value is usually stable within 2.8–3.0 W/kg.

Can you provide chrome-free coating for this grade?

Yes, we provide RoHS and REACH compliant chrome-free insulation coating, which is widely accepted by Japanese and European customers.

Can you slit 35W300 into narrow strips for motor laminations?

Yes, we have precision slitting lines with ±0.005mm width tolerance, which can meet the requirements of high-speed automatic lamination stacking.

What is the delivery time for JIS grade CRNO coil?

Standard stock products can be delivered within 7-10 working days after deposit; customized products need 10-15 working days.

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35W300 CRNO Coil | JIS C 2552 Non-oriented Silicon Steel Coil