Description
Factory-Direct M19 CRGO Silicon Steel — Every coil passes our in-house physical and chemical laboratory for magnetic property verification before shipment, eliminating grain orientation uncertainty at the source.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | M19 CRGO Silicon Steel Coil/Plate |
| Product Type | Cold Rolled Grain Oriented Electrical Steel Coil / Plate |
| Steel Grade | M19 |
| Thickness (Coil) | 0.3–14mm |
| Thickness (Plate) | 0.3–80mm |
| Width | 1000mm / 1219mm / 1250mm / 1500mm / 1524mm / 1800mm / 2000mm or custom |
| Technique | Cold Rolled |
| Surface Treatment | 2B / 2D / HL (Hairline) / BA (Bright Annealed) / No.4 / Colored mirror (Gold / Sapphire / Rose / Black / Bronze) / Colored brushed (Gold / Sapphire / Rose / Black) |
| Packing | Waterproof paper + metal pallet + angle bar protection + steel belt |
| Container Loading | 20ft GP (~24–26CBM, 23MTS) / 40ft GP (~54CBM, 27MTS) / 40ft HG (~68CBM, 27MTS) |
| Trade Terms | EXW / FOB / CFR / CIF |
| Payment Terms | T/T / L/C or other |
| Application | Transformers / Motors / Generators |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Electrical Equipment Manufacturing | Transformer core lamination stacks, E-I core assemblies, distribution transformer shells |
| Machinery Manufacturing | Motor stator and rotor laminations, generator core segments, industrial drive laminations |
| EPC Contractors | Power substation transformer procurement, renewable energy station electrical steel sourcing |
| Industrial System Integrators | Conveyor drive motor cores, automation equipment electromagnetic components |
Why Grain Orientation Consistency Decides Transformer Efficiency
M19 CRGO silicon steel delivers directional magnetic permeability that non-grain oriented grades cannot replicate in transformer and motor core applications.
Electrical steel buyers routinely encounter iron loss values that deviate from mill declarations once coils reach the production floor. A batch labeled M19 may show acceptable chemistry on the certificate but fail magnetic testing under operating flux density — resulting in core rejection, rewinding costs, and project delays. Grain orientation consistency requires controlled cold reduction, precise decarburization annealing, and final high-temperature purification that only verified production lines can maintain. We test magnetization curves and interlaminar resistance on every coil before release. [NEED_CITE: CRGO silicon steel magnetic property testing standards per IEC 60404]
Matching M19 CRGO to Transformer and Motor Core Requirements
Transformer cores demand tight core loss control at specific flux densities — M19 CRGO silicon steel achieves this through its aligned grain structure that channels magnetic flux along the rolling direction. Motor and generator laminations require consistent thickness tolerance across the coil width to ensure uniform stacking factors and minimize eddy current losses. Our cold rolling process maintains thickness precision across the full 0.3–14mm coil range and 0.3–80mm plate range, while custom widths up to 2000mm reduce cutting waste on large-diameter stator cores.
Engineering Compliance and Certification for Electrical Steel Procurement
Electrical steel used in power transformers must meet core loss and magnetic induction requirements defined by IEC 60404 and relevant national standards. EU-bound shipments require CE documentation and traceable mill test certificates for customs clearance, while North American projects often reference ASTM A683 equivalents. Our ISO 9001:2015 certified quality system covers incoming raw material inspection, in-process magnetic testing, and final dimensional verification. Third-party inspection through SGS or BV confirms batch conformity before container sealing. [NEED_CITE: IEC 60404 grain oriented electrical steel magnetic property requirements]
Understanding M19 CRGO Cold Rolling and Grain Orientation Technology
Cold Rolled Grain Oriented electrical steel derives its superior magnetic properties from Goss texture development — a crystallographic alignment where iron grains orient with their easy magnetization axis parallel to the rolling direction. The M19 grade designation indicates specific iron loss limits at 1.7 Tesla and 50 Hz frequency, making it suitable for distribution transformers and medium-efficiency motors. The cold rolling process involves multiple reduction passes with intermediate annealing to achieve final thickness while preserving grain orientation. Surface treatments including 2B, BA, and HL finishes provide different insulation characteristics for lamination stacking — 2B offers standard interlaminar resistance, while BA finish delivers enhanced surface smoothness for precision core assembly.
Hidden Costs of Procuring Electrical Steel Without Verified Magnetic Properties
Ordering CRGO silicon steel based solely on grade designation without independent magnetic verification creates multiple downstream risks. Material that fails to meet declared iron loss values forces core redesign, increases no-load losses in transformers, and may trigger rejection during factory acceptance testing. Missing or incomplete mill test certificates cause customs holds on international shipments, while inconsistent thickness tolerance across coil width generates stacking gaps that reduce effective core cross-section. These issues compound into project delays, warranty claims, and reputational damage with end users. [NEED_CITE: electrical steel procurement quality verification best practices]
Why Source M19 CRGO Silicon Steel From Our Jinan Facility
Our three dedicated production lines manufacture over 2,800 specifications covering coil thicknesses from 0.3mm to 14mm and plate formats up to 80mm — eliminating the specification gaps that force buyers to source from multiple suppliers. Every M19 CRGO silicon steel coil passes through our in-house physical and chemical laboratory where magnetization curves, iron loss values, and interlaminar resistance receive full verification before release. We hold 41 invention patents including proprietary processing technologies, and our products carry ISO 9001:2015, Lloyd’s Register EU CE, Singapore FPC certifications with SGS and BV verification available. Factory-direct pricing means no trading company margins, while our professional export team manages documentation, container optimization, and door-to-door logistics to 50+ countries across EU, North America, Middle East, and Southeast Asia.
Documentation & Compliance
- Mill Test Certificate documenting M19 CRGO chemical composition, iron loss values at 1.7T/50Hz, and magnetic induction per IEC 60404 standards
- ISO 9001:2015 quality management certificate covering cold rolled electrical steel production and testing processes
- Lloyd’s Register EU CE certificate for electrical steel products exported to European markets
- SGS or BV third-party inspection report confirming magnetic properties and dimensional tolerance before shipment
- Material traceability by heat number linking each coil to production batch, chemical analysis, and magnetic test results
- Complete customs documentation including packing list, Bill of Lading, and Certificate of Origin for destination country clearance
Packaging, Loading & Delivery
- M19 CRGO silicon steel coils packed with waterproof paper inner layer, metal pallet base, angle bar edge protection, and steel belt strapping to prevent moisture damage and edge deformation during ocean transit
- Surface treatment preservation through anti-rust oil application on 2B and BA finish coils, maintaining interlaminar insulation properties until customer receiving
- Container loading optimization for 0.3–14mm coil thickness range using 20ft GP units at 23MTS capacity or 40ft HG units at 27MTS for heavier gauge plate formats up to 80mm
- Custom width cutting available for 1000–2000mm range orders, reducing on-site cutting waste for transformer core lamination projects
- Heat number and M19 grade identification marked on each coil ID tag and outer packaging for warehouse traceability
- FOB, CFR, CIF, and DDP trade terms with professional loading plans and real-time shipment tracking to 50+ countries
Initiate Your M19 CRGO Procurement Inquiry
Submit your specifications including thickness, width, quantity, surface treatment preference, and destination port to receive detailed pricing, production lead time, and mill test certificate samples within 12 hours. Our engineering team provides custom width recommendations for your transformer or motor core design to minimize cutting waste, and confirms certification requirements for your destination market before contract signing.
Request M19 CRGO Silicon Steel Quotation with Mill Test Certificate
Send your inquiry via email to admin@sdxjysteel.com or contact us at +86 188 5315 7756 (WhatsApp/WeChat) with your specifications and quantity requirements.
Frequently Asked Questions
Q: What is the difference between CRGO and non-grain oriented silicon steel, and how do I choose?
A: CRGO (Cold Rolled Grain Oriented) silicon steel like M19 has its crystal grains aligned along the rolling direction, providing superior magnetic permeability in that direction — ideal for transformer cores where flux follows predictable paths. Non-grain oriented (CRNGO) steel offers more uniform magnetic properties in all directions, making it suitable for rotating machine cores like motors where flux direction changes. Choose M19 CRGO for transformer and static equipment applications requiring low core loss at specific flux densities.
Q: Can you provide custom thickness and width outside standard ranges, and what is the MOQ?
A: We manufacture M19 CRGO silicon steel in coil thicknesses from 0.3mm to 14mm and plate formats from 0.3mm to 80mm, with standard widths of 1000mm, 1219mm, 1250mm, 1500mm, 1524mm, 1800mm, and 2000mm. Custom widths beyond standard ranges are available based on production feasibility — contact our team with your specific requirements for quotation and minimum order quantity confirmation.
Q: How do you ensure magnetic property consistency across batches?
A: Every M19 CRGO silicon steel coil undergoes comprehensive testing in our in-house physical and chemical laboratory before shipment. We verify magnetization curves, iron loss values at specified flux density and frequency, and interlaminar resistance for each production batch. Mill Test Certificates document actual test results rather than nominal values, and third-party inspection through SGS or BV provides independent verification for customers requiring additional assurance.
Q: What surface finishes are available, and how do they affect lamination stacking?
A: M19 CRGO silicon steel is available in 2B (standard matte), 2D, HL (Hairline), BA (Bright Annealed), No.4, and decorative finishes including colored mirror and brushed options. For transformer and motor core applications, 2B finish provides standard interlaminar insulation suitable for most stacking requirements, while BA finish offers enhanced surface smoothness for precision core assembly with tighter stacking factors. Surface treatment selection depends on your specific lamination insulation requirements and core assembly process.
Q: What certifications and documentation are provided for customs clearance and project compliance?
A: We provide Mill Test Certificates with chemical composition and magnetic property data, ISO 9001:2015 quality certificates, Lloyd’s Register EU CE certification for European market compliance, Singapore FPC certification, and SGS/BV third-party inspection reports. Complete customs documentation including packing list, Bill of Lading, and Certificate of Origin ensures smooth clearance at destination ports across 50+ countries.
