Explore our primary selection of cold-rolled, hot-rolled, and precision-engineered plates and sheets designed to satisfy critical load-bearing, corrosion-resistant, and structural requirements globally.
In modern global manufacturing, the selection between high-strength structural steel and aerospace-grade aluminium plates is governed by weight-to-strength ratios, environmental corrosive agents, and mechanical machining limits. As a premier industrial orchestrator, Ningbo Puppet Steel Co., Ltd. serves this global nexus by providing customized, high-precision metal alloy sheets.
The transition towards sustainability and reduced fuel metrics is driving a major pivot toward lightweight Aluminium Plates (specifically 5xxx, 6xxx, and 7xxx series) across the marine, automotive, and logistics framework. Concurrently, highly refined carbon steel and stainless alloys remain the backbone of heavy building structural architectures, ensuring that tensile capacities and load dynamics conform to strict local regulations.
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.
Through our state-of-the-art facilities in Ningbo and deep metallurgical expertise, we process raw metal substrates into critical components driving global heavy infrastructure and industrial equipment sectors.
Annual Output (Metric Tons)
Countries Exported Globally
Quality Defect Rate Limit
Mill Test Certification (MTC)
The global metallic structural components market is witnessing a profound transition. Traditionally dominated by heavy structural carbon steel sheets, key strategic sectors like aerospace, clean energy systems, and high-speed maritime vessels are aggressively adopting high-performance Aluminium Plates. This evolution is spearheaded by key manufacturing hubs in China, which account for over 50% of the world's primary aluminium processing and rolling capacity.
Industrial procurers focus on specific alloys to address targeted environments:
Renowned for superior corrosion resistance in saline environments. Alloys such as 5083 and 5086 are vital for liquefied gas transport systems, marine vessel hulls, and chemical containment units.
Features an optimal balance of weldability, structural strength, and surface finishing ease. The 6061-T6 and 6082 structural plates are extensively deployed in civil architecture framing and automotive chassis components.
Provides maximum yield strength matching that of structural carbon steel. Alloys such as 7075-T6 are essential for aerospace structures, heavy-load mold fabrication tooling, and defense sector components.
Global sourcing agents operating within multinational industrial networks prioritize risk mitigation, technical consistency, and supply chain transparency. Sourcing metal plates is not just about price per metric ton; it requires strict alignment with global engineering specifications.
An enterprise procurement framework focuses on three main criteria:
| Metal Family / Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Density (g/cm³) | Corrosion Resistance | Primary Industrial Applications |
|---|---|---|---|---|---|
| Mild Steel Plate A36 / Q235 | 250 Min | 400 - 550 | 7.85 | Low (Requires coating/zinc plating) | Civil construction, structural framing, heavy machine structures |
| Carbon Steel A572 Grade 50 | 345 Min | 450 Min | 7.85 | Moderate (Atmospheric protection needed) | Bridges, infrastructure utility towers, high-stress load-bearing beams |
| Stainless Steel 304 / 316 | 205 Min | 515 Min | 8.00 | Excellent (Particularly 316 in marine chloride environments) | Chemical processing pipelines, offshore oil rigs, food-grade storage units |
| Aluminium Plate 5083-H116 | 220 Min | 305 Min | 2.66 | Outstanding (Saline corrosion immune) | Shipbuilding, pressure vessels, LNG fuel tanks, aerospace equipment |
| Aluminium Plate 6061-T6 | 276 Min | 310 Min | 2.70 | High (Self-passivating oxide film) | Automotive suspension, structural frames, heavy mechanical components |
The integration of Industry 4.0 practices has redefined the efficiency of metal sheet manufacturing in China. Ningbo Puppet Steel Co., Ltd. implements advanced automation at every stage of production:
Real-time thickness monitoring systems adjusting rollers dynamically to maintain a tight ±0.05mm tolerance profile, ensuring optimal processing flat levels.
Sensory loop controls managing the pickling, zinc passivation (Z60 to Z120), and color-stone coating lines to guarantee paint adhesion and chemical resilience over a 50-year lifespan.
From slab ingestion to port dispatch, barcodes track raw materials, quality inspections, and logistical routes to guarantee transparency.
Puppet Steel manages every stage of production internally, from material selection and cutting to surface treatment and packaging. This direct oversight ensures reliable 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.
Metal plates are deployed across demanding applications worldwide:
Explore our advanced production lines, automated steel rolling mills, slitting machines, and state-of-the-art warehouses in Ningbo, China.
Find answers to technical questions about metal properties, tolerance ranges, coatings, certifications, and international logistics.
All shipments include Mill Test Certificates (MTC) conforming to EN 10204 3.1. These documents outline the chemical composition (Carbon, Manganese, Silicon, Phosphorus, Chromium, etc.) along with mechanical properties, including Yield Strength, Tensile Strength, and Charpy V-notch impact test values. Additional third-party certifications (SGS, BV, TUV) are available upon request.
Our manufacturing lines support precise tolerances. Cold-rolled sheets (0.5mm - 3.0mm) meet tight tolerances within ±0.03mm. Heavy structural hot-rolled plates (over 6.0mm thickness) adhere to ASTM A6 and EN 10029 standards, maintaining values within ±0.15mm to ±0.35mm depending on the target width.
Our marine-grade alloys, such as 5083 and 5086, form a natural, self-passivating oxide surface layer. We offer options for anodizing treatments to increase oxide layer thickness, as well as marine-grade anti-corrosive primer coatings, to protect structural components from galvanic action.
ASTM A36 and Q235 are mild carbon steels with yield strengths of 250 MPa and 235 MPa respectively, making them highly weldable and easy to form. Q345 (now Q355 under modern standards) is a high-strength low-alloy (HSLA) steel with a yield strength of 345 MPa. It provides greater load-bearing capacity while reducing overall steel mass in heavy frameworks.
Yes. We provide complete OEM/ODM fabrication services. Our facilities support CNC laser cutting, bending, punching, welding, and surface finishing to process raw sheets into custom structural enclosures and industrial cabinets based on customer AutoCAD or SolidWorks files.
We use multi-layer protective packaging for export orders. Steel plates are coated with an anti-rust oil layer, wrapped in moisture-resistant VCI (Volatile Corrosion Inhibitor) paper, secured with steel straps, and placed on heavy-duty wooden or steel pallets protected by corner guards.
PPGI features a hot-dipped galvanized steel base coat (100% zinc). PPGL uses a galvalume coating consisting of 55% aluminum, 43.4% zinc, and 1.6% silicon. PPGL provides superior corrosion resistance in high-temperature and acidic atmospheric environments, extending operational lifespans.
We offer multiple surface finishes: 2B (cold-rolled, annealed, and pickled), No. 4 (brushed/satin finish), BA (bright annealed), and 8K Mirror finish. These options suit both industrial applications requiring corrosion resistance and architectural designs focused on aesthetics.
MOQ ranges vary. Standard sizes in carbon steel (such as A36 or Q345) and standard aluminum sheets (5083 or 6061) are available from stock with low MOQs (often starting at 1 to 5 metric tons). Custom mill runs for non-standard alloy compositions or special thicknesses typically require an MOQ of 10 to 25 metric tons.
Ningbo Puppet Steel Co., Ltd. is located close to the Ningbo-Zhoushan Port, the world's busiest port by cargo throughput. This proximity minimizes inland freight charges, reduces transit times, and allows for efficient container loading and ocean dispatch to major global destinations.
Explore our secondary line of structural framing materials, corrugated roofing panels, and automotive-grade sheets designed for heavy manufacturing and civil infrastructure projects.
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.
Whether your project requires high-corrosion-resistant marine aluminum plates, structural high-tensile carbon steel sheets, or custom-bent metal housing chassis, our engineers are ready to assist. Contact Puppet Steel today to receive a detailed chemical composition analysis, specific weight calculations, or a comprehensive commercial pricing proposal tailored to your logistics requirements.
Puppet Steel
