M300-35 CRNO Coil | ASTM A677 Non-oriented Electrical Steel Coil

Conforms to ASTM A677/A677M standard, widely recognized in North American market
Equivalent to traditional grade M19, stable and mature magnetic performance
0.35mm gauge, good formability for motor and generator lamination stamping
Complete insulation coating options to meet different insulation requirements
Supports third-party inspection and full export documentation for customs clearance

Product Overview

M300-35 is a standard grade of cold-rolled non-oriented electrical steel under ASTM A677 specification, with a nominal thickness of 0.35mm. It corresponds to the traditional well-known grade M19, and is a general-purpose medium-loss grade widely used in the North American market. It has balanced magnetic properties and mechanical properties, and is suitable for various general motor and generator core applications.

The product can be supplied with single-side or double-side inorganic insulation coating, which provides reliable inter-lamination insulation. The original mother coil width is 1000-1250mm, and precision slitting service is available with width ranging from 5mm to 1240mm and tolerance of ±0.005mm. The material has good punchability and is suitable for high-speed stamping production lines.

M300-35 CRNO coil is widely used in industrial motors, small generators, household appliance motors, transformer cores and automotive electrical components in the North American market. We can provide processing services such as flattening, stamping and laser cutting according to customer needs.

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	M300-35 CRNO Coil
Full Name	Cold-Rolled Non-Oriented Electrical Steel Coil
Standard	ASTM A677 / A677M
Representative Grade	M300-35
Traditional Equivalent	M19
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 compliant chrome-free coating
Processing Services	Flattening, stamping, laser cutting, stress-relief annealing
Typical Applications	Industrial motors, small generators, appliance motors, transformer cores
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

ASTM Grade	Thickness	GB Equivalent	Baosteel Equivalent	JIS Equivalent	Traditional Grade
M300-35	0.35mm	35WW300	B35A300	35W300	M19
M250-50	0.50mm	50WW250	B50A250	50W250	M19 (0.5mm)
M470-50	0.50mm	50WW470	B50A470	50W470	M27
M600-50	0.50mm	50WW600	B50A600	–	M36

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

What is the traditional equivalent grade of M300-35?

M300-35 corresponds to the traditional well-known grade M19, both are 0.35mm general-purpose non-oriented electrical steel under ASTM system.

Does M300-35 meet ASTM A677 standard?

Yes, M300-35 is produced and tested in strict accordance with ASTM A677/A677M standard, and Mill Test Certificate is provided for each batch.

What coating options are available for ASTM grade electrical steel?

Single-side and double-side inorganic insulation coatings are available, including chrome-free environmental coating that meets RoHS requirements.

Can you provide material according to old grade M19 / M27 / M36?

Yes, we can supply corresponding materials according to traditional old grades. M27 corresponds to M470-50, and M36 corresponds to M600-50.

Can you arrange third-party inspection before shipment?

Yes, SGS, BV and other third-party inspection services can be arranged before shipment according to customer requirements.

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M300-35 CRNO Coil | ASTM A677 Non-oriented Electrical Steel Coil