SMSTEEL
SMSTEEL
Browse our diverse steel inventory, spanning electrical silicon sheets, galvanized coils, and heavy-duty structural piping tailored for global enterprises.
Silicon steel, or electrical steel, is a specialized iron-silicon alloy engineered to possess high magnetic permeability and exceptionally low core loss, making it indispensable for power generation, transmission, and conversion applications.
Silicon steel is tailored by introducing 1.0% to 4.5% silicon to carbon-steel chemistry. This composition dramatically increases the electrical resistivity of the iron matrix, minimizing the circulation of eddy currents. Limiting these currents restricts thermal power loss, boosting the system's operational efficiency.
Cold Rolled Grain Oriented steel is processed with precise thermomechanical steps to orient its internal grain structure parallel to the rolling direction. This highly anisotropic material possesses excellent magnetic properties in the rolling direction, making it ideal for stationary equipment like transformer cores.
Cold Rolled Non-Grain Oriented steel features an isotropic grain structure, providing uniform magnetic properties in all directions. It is critical for rotating machinery, such as generators, electric vehicle (EV) drive motors, and small home appliance motors, where magnetic flux vectors rotate dynamically.
| Material Class | Common International Grades | Thickness Range (mm) | Silicon Content (%) | Max Core Loss at 50Hz (W/kg) | Typical Applications |
|---|---|---|---|---|---|
| CRGO (Grain Oriented) | 23QG090, 27Q120, 30Q130, M4, M5 | 0.23 - 0.35 | 3.0% - 3.5% | 0.90 - 1.30 (at 1.7T) | Power Transformers, Distribution Core, Instrument Transformers |
| CRNGO (Non-Oriented) | 35H300, 50H470, 50H600, M19, M36 | 0.35 - 0.50 | 1.5% - 3.0% | 3.00 - 6.00 (at 1.5T) | Electric Vehicle Motors, Wind Turbines, Compressors, Industrial Stators |
| Thin-Gauge CRNGO | 20NO1200, 15NO1000 | 0.15 - 0.20 | 3.2% - 3.8% | 1.00 - 1.20 (at 1.0T, 400Hz) | High-frequency High-speed Traction Motors, Aviation Alternators |
Founded in 2010, STEP MILLION STEEL SUPPLY CHINA CO., LTD. has grown into a leading global supplier and manufacturer of premium steel materials. Over the last 15 years, we have built a reputation for excellence in the production and distribution of a wide portfolio of products including: pre-galvanized and hot-dip galvanized steel pipes, ERW pipes, structural tubes, scaffolding tubes, cold-rolled steel sheets (SPCC), pickled coils (SPHC), galvanized sheets (SGCC/SECC), stainless steel coils (STS), aluminum coils (AL), and high-efficiency silicon steel (SI).
Our operation serves critical sectors including construction, green housing, safety fencing, home appliances, automotive, and motor manufacturing. Through our commitment to operational reliability and quality assurance, we have secured long-term, strategic partnerships with global brands like LG Electronics and domestic industrial leaders like Xizi United.
Our production facilities house 8 advanced, continuous production lines. Each line integrates a minimum of five processing steps to guarantee structural and mechanical consistency. Fifty percent of our 100,000-ton monthly output is exported to support key infrastructure projects globally.
Operating with over 15 years of industry experience, we offer our clients technical expertise and reliable operations.
We deploy over 20 professional quality inspectors with more than 10 years of experience. Standardized testing is completed using precision equipment sourced from Germany and Japan. Every batch conforms to GB, ASTM, BS, or DIN standards, and CE certifications are provided upon request to guarantee reliability.
We maintain deep strategic alliances with leading domestic mills, including Hebei Iron and Steel Group, Baowu Iron and Steel Group, Shougang Iron and Steel Group, Bengang Group, Anshan Iron and Steel Group, Hebei Jingye, Jinxi, Lingyuan, and New Tiangang. We distribute over 700,000 tons of steel annually, with a turnover nearing 4 billion RMB.
Our service protocol ensures all standard RFQs receive a detailed response within 24 hours, and custom technical solutions are generated within 48 hours. We accommodate trial orders to build commercial trust before establishing long-term agreements. Flexible payment options and expedited shipping help keep your project on schedule.
Procuring high-grade silicon steel coils presents challenges for global buyers, who must manage tight magnetic losses, dimensional tolerances, and mechanical stability across production runs. Even minor dimensional variations can reduce assembly efficiency and lead to component failure.
The STEP MILLION Advantage: By partnering with domestic producers like Baowu and Shougang, we secure top-grade raw hot-rolled silicon bands. Our facility processes these substrates using automated rolling and slitting lines, achieving thickness tolerances within ±0.02 mm and control over edge burrs. This process provides global purchasers with high-performance electrical steel at competitive market rates.
We work with international logistics providers to ensure our coils are protected against ocean moisture. Each coil is packed using VCI anti-rust paper, steel sleeves, and heavy-duty radial strapping on reinforced wooden skids to prevent damage during transport.
Ensuring seamless cross-border supply chains through absolute alignment with international regulatory, linguistic, and logistical frameworks.
As regulations tighten, we provide complete transparency regarding the carbon footprint of our steel. We assist EU customers in satisfying Carbon Border Adjustment Mechanism (CBAM) declarations, documenting raw material origins and production energy efficiency metrics. All electrical steel shipments comply with RoHS and REACH regulations, eliminating compliance bottlenecks at destination customs.
We bridge cross-regional technical gaps by supplying certified equivalence reports. Whether your engineering department specifies ASTM (USA), JIS (Japan), EN (Europe), or GB (China) standards, our materials team translates core loss tolerances, lamination stacking factors, and magnetizing force limits to match your requirements.
To support buyers navigating tariff complexities or logistics bottlenecks, we coordinate with localized warehouses near primary ports. Through partnerships across South America, Southeast Asia, the Middle East, and Africa, we offer flexible storage, bulk inventory splitting, and DAP/DDP delivery terms that mitigate operational risks.
Our high-efficiency silicon steel and precision-rolled steel products serve as foundational components across key global industries.
High-tensile galvanized structural channels, framing sections, and supporting pipes engineered to withstand load requirements in industrial facilities and civil projects.
Supplying specialized SECC electro-galvanized sheets and CRNGO silicon steels for appliance housings, internal brackets, compressor motors, and heat exchangers.
Corrosion-resistant Al-Mg coated and prepainted galvanized coils processed for roll-forming into industrial cladding, standing seam profiles, and weather-proof roof panels.
Precision-grade, lightweight structural steel sheets and thin-gauge non-oriented electrical steels utilized in drive motor stators for electric and hybrid vehicles.
Versatile carbon steel tubes, flat sheets, and custom-slitted coils supporting hardware fabricators, cabinet builders, and shelving manufacturers.
Our core business: CRNGO and CRGO steel laminations utilized to assemble high-efficiency distribution transformers, electric stators, and magnetic shielding assemblies.
How modern developments in vehicle electrification and grid updates are reshaping the demand for electrical steels.
As electric vehicle traction motors reach rotational speeds exceeding 15,000 RPM, operating frequencies increase. Conventional 0.35mm sheets can suffer from high eddy current losses. The industry is shifting toward thin-gauge CRNGO (0.20mm and 0.15mm) to maintain motor efficiency and manage temperature rise.
For high-efficiency power transformers, manufacturers demand ultra-low core loss. Laser scribing systems refine the magnetic domain structure of CRGO coils. This process divides wider magnetic domains, reducing core loss levels in power transmission networks.
Global regulations require the replacement of hexavalent chromium-based coatings. Current specifications mandate organic-inorganic composite coatings (such as C-5 and C-6 insulation classes) that are chromium-free and offer high surface insulation resistance, punchability, and thermal stability during stress relief annealing.
Direct answers to the common technical and supply chain queries raised by procurement teams and electrical design engineers.
Contact our engineering support team to receive material test reports (MTR), dynamic magnetization curves, and a competitive commercial quote within 24 hours.
Submit Sourcing QueryFind a variety of industrial carbon steels, stainless sheets, and electrical alloy coils in our inventory.
