Explore our top-tier selection of high-durability cold rolled, hot rolled, galvanized, and prepainted structural steel products.
Ningbo Puppet Steel Co., Ltd. is a professional Steel Sheet Manufacturer | Cold Rolled, Hot Rolled & Galvanized Steel Supplier committed to providing high-quality steel products and customized metal solutions for customers worldwide. Serving industries such as construction, infrastructure, manufacturing, automotive, energy, home appliances, and industrial equipment, the company has built a strong reputation for reliable products and consistent service.
Located in Ningbo, China, Puppet Steel operates advanced processing and manufacturing facilities equipped with modern production lines and precision quality inspection systems. The company specializes in a comprehensive range of steel products, including cold rolled steel sheets, hot rolled steel sheets, galvanized steel sheets, galvalume steel sheets, prepainted steel sheets, carbon steel sheets, structural steel sheets, and customized steel processing solutions.
With extensive industry experience, the company offers flexible OEM and customized manufacturing services to meet various project requirements. From material selection and cutting to surface treatment and packaging, every production stage is carefully managed to ensure product consistency, dimensional accuracy, and long-term performance. Strict quality control procedures are implemented throughout the manufacturing process to comply with international standards and customer specifications.
Puppet Steel focuses on delivering durable, corrosion-resistant, and cost-effective steel products suitable for demanding applications in both domestic and international markets. The company maintains long-term partnerships with contractors, distributors, wholesalers, fabricators, and industrial manufacturers across North America, Europe, Southeast Asia, the Middle East, and other global regions.
Driven by innovation, quality, and customer satisfaction, Ningbo Puppet Steel Co., Ltd. continuously invests in technology upgrades and production efficiency improvements. Through competitive pricing, stable supply capacity, timely delivery, and professional technical support, the company strives to become a trusted global partner for steel sheet manufacturing and metal material solutions.
Our production output operates under certified ISO 9001:2015 frameworks, ensuring that every slit coil, galvanized strip, and structural flat bar maintains absolute alignment with international engineering thresholds.
How custom-engineered steel strips and specialized profiles drive global industrial evolution across critical sectors.
High-tensile strength cold-rolled steel strips serve as the structural backbone for stamping components, seat runners, and brackets. Precision tolerances ensure flawless compatibility with robotic automated assembly lines.
Our premium low-iron-loss silicon steel strips and EI laminations are key components for transformer cores, electric motor stators, and power distribution systems, optimizing energy conversion and mitigating thermal loss.
PPGI (prepainted galvanized steel) and structural hot-rolled flat bars withstand severe atmospheric degradation. Specially formulated coatings provide long-term UV resistance, protecting commercial structures.
In high-speed stamping operations, variations in strip thickness can lead to tool damage, micro-cracks, and structural instability. By deploying state-of-the-art AGC (Automatic Gauge Control) mills, Ningbo Puppet Steel provides custom steel strips with a thickness consistency within ±0.01mm. This precision allows global manufacturing partners to increase their stamping strokes per minute (SPM) by up to 25%, drastically lowering production overhead and material scrap rates.
Navigating cross-border supply chains with certified compliance and localized engineering expertise.
International engineering projects require absolute alignment with localized standards. Ningbo Puppet Steel ensures all custom products comply with major global codes:
By offering complete Mill Test Certificates (MTC) according to EN 10204 3.1, we ensure full traceability from ladle analysis to the final delivered coil.
| Parameter | Standard Capability | OEM Custom Limits |
|---|---|---|
| Thickness Range | 0.15 mm – 3.0 mm | 0.08 mm – 6.0 mm |
| Width Range | 10 mm – 1250 mm | 5 mm – 1600 mm (Precision Slit) |
| Zinc Coating Weight | Z60 – Z275 (g/m²) | Up to Z600 (High-Corrosion Barrier) |
| Edge Profiles | Slit Edge (Mill Edge) | Deburred, Rounded (Conditioned Edge) |
The future of steel strip manufacturing is defined by decarbonization, ultra-high-strength metallurgy, and real-time quality control.
Developing dual-phase (DP) and complex-phase (CP) steel strips with high yield strengths to aid in vehicle weight reduction without sacrificing collision energy absorption.
Shifting toward lead-free, chrome-free passivation coatings that enhance rust protection while satisfying stringent global environmental restrictions.
Integrating high-speed visual scanning software to detect and document micro-cracks, surface pitting, or pinholes in real time during the slitting process.
Inside our advanced processing centers, raw cold-rolled and hot-rolled coils are converted into custom steel components and architectural products.
Get answers to critical technical questions regarding grade availability, processing methods, and quality standards.
A Slit Edge (Mill Edge) is produced during the rotary slitting process, which leaves micro-burrs along the sides. A Round Edge (or conditioned edge) is processed with additional deburring tools to remove these burrs, making the edge smooth and rounded. This is crucial for applications such as springs, brackets, and hand tools where sharp edges present safety risks or localized structural stress concentrators.
Our mills utilize automatic gauge control (AGC) systems and continuous laser sensors to monitor thickness changes down to the micron level in real time. This dynamic adjustment allows us to maintain a stable thickness profile across the entire length of the coil, adhering to tolerances as tight as ±0.01 mm for precision applications.
For magnetic applications, we recommend cold-rolled grain-oriented (CRGO) and non-oriented (CRNO) silicon steel strips. The specific grade (such as Baosteel M0h or other low iron loss variations) depends on the operating frequency and target energy efficiency metrics. These alloys minimize magnetic core losses and eddy currents.
Depending on end-use applications, we offer oiling, skin-passing, chromate passivation, phosphate treatments, and anti-fingerprint coatings. For harsh outdoor environments, our hot-dip galvanized (GI) and prepainted galvanized (PPGI) steel coatings offer long-term galvanic and barrier protection.
Yes, we customize packaging configurations to withstand long-distance ocean transit. Options include horizontal (eye to sky) or vertical (eye to wall) coil orientation wrapped in anti-rust VCI film, secured with strong steel bands, and mounted on heavy-duty, fumigated wooden pallets to eliminate moisture damage and physical shifting.
Get in touch with our engineering team to request a quote, material samples, or review customized slitting and packaging parameters.
Contact Our Technical Sales TeamPremium heavy plates, structural bars, and specialty silicon sheets designed for high-stress manufacturing.
Puppet Steel