Hot Products

Our premium color coated steel products are manufactured using high-quality hot dip zinc-coated (GI) steel or an aluzinc/galvalume (AZ/GL) substrate. At our advanced coating facility, the metal undergoes thorough cleaning, pre-treatment, and multiple layers of organic coatings on a continuous paint coating line (CCL). At QINGDAO SINCERELY STEEL, we offer a comprehensive range of color coated materials that combine the robust strength and formability of steel with the superior corrosion resistance provided by zinc and paint. As one of the leading suppliers and factories in China, we pride ourselves on providing the widest range of colors available in the market. Customization options for shades and gloss levels are also available to meet your specific requirements. Our Color Coated Prepainted Galvanized Steel Coils & Prepainted Aluzinc Steel Coils (PPGI / PPGL) are available in various formats, including coils, sheets, slit strips, and profiled sheets. With an impressive annual coil coating capacity of 150,000 metric tonnes, we accommodate thickness ranges from 0.1mm to 2.0mm and widths from 650mm to 1350mm, making us a top choice for customers seeking quality steel solutions in China.

QINGDAO SINCERELY Steel stands out as the premier manufacturer of high-quality prepainted aluminum coils in China. Our state-of-the-art ISO 9001:2015 certified factory is strategically located in the Shandong Industrial Park, near Qingdao Port, ensuring efficient production and distribution. As leading suppliers in the industry, we proudly offer products that are MADE IN CHINA and exported globally to countries including Saudi Arabia, Kuwait, Oman, Bahrain, Jordan, as well as various African and European nations.

Our color-coated aluminum coils are available in various surface coatings, including polyester (PE), fluorocarbon (PVDF), and epoxy coatings. Additionally, we classify our products based on coating thickness: single-coated aluminum coils (4-20 microns), double-coated aluminum coils (25-28 microns), and triply-coated aluminum coils (35-38 microns).

Coated aluminum coils (PPAL) are versatile and extensively used in applications such as roofing and cladding systems, ceiling systems, curtain wall plates, shutters, gutters, composite panels, cans, home appliance boards, and embossed aluminum coils. Trust QINGDAO SINCERELY Steel, your reliable partner in China for high-quality aluminum coil solutions.

What is a Steel Purlin?

Steel Purlins, specifically Cold-Formed Steel Purlins, are essential longitudinal beams used to effectively brace trusses or rafters. They play a crucial role in transferring external loads from the roof to the truss's top chord. The design of these purlins is based on a pin-connected structure, treating the distance between trusses as the span and the ends as joints. Common loads, such as gravity and wind, can lead to sagging, which is why sag rods are strategically added to provide lateral support at designated points.

In addition to their primary use in roofing systems, purlins are versatile and can also function as girts for wall cladding. This adaptability makes them a popular choice among China suppliers and factories. Below is an image showcasing typical steel framing incorporating purlins.

Discover SISCO's high-quality hot dipped galvanized steel coils, a top choice among China suppliers and factories for various industries including automotive, construction, and appliance manufacturing. Our galvanized steel coils offer exceptional rust resistance, making them indispensable where durability is key. More economical than stainless steel, these non-corrosive steel coils provide a reliable solution for businesses seeking both affordability and performance. The strong zinc coating effectively protects bare steel from corrosion, ensuring longevity. SISCO's products are utilized in a broad range of applications, from washing machines and refrigerators to car parts, ductwork, and HVAC systems, serving residential, commercial, and industrial needs. Choose SISCO for your galvanizing needs and experience the ideal blend of quality and cost-effectiveness

Introducing our high-quality steel sheets, expertly manufactured in China by reliable suppliers and factories. These sheets feature a base material of Full Hard steel, with a hardness range of HRB (70-90) compliant with ASTM/JIS standards. Our products come with a durable zinc coating, ranging from 60 gsm to 300 gsm, ensuring excellent corrosion resistance.

We offer a variety of widths after corrugation, including the most common sizes like 602, 720, 740, 762, 780, 800, 840, 910, and 1100 mm. The thickness of our steel sheets ranges from 0.14 mm to 0.80 mm, catering to diverse application needs.

Lengths are customizable in millimeters, available in dimensions such as 1830, 2135, 2440, 2745, 3000, 3050, 3660, 4270, 4880, or tailored according to your requirements. We also provide bundle packing options, accommodating 800-1100 sheets per bundle, specifically designed to meet customer preferences.

QINGDAO SINCERELY Steel is a top China-based factory and one of the leading suppliers of high-quality Prepainted Aluminium Coils. Our ultra-modern ISO 9001:2015 certified coil coating facility is strategically located in the Shandong Industrial Park near Qingdao Port, enabling efficient production and distribution. As a trusted China factory, we serve a wide regional network and export our products globally to countries including Saudi Arabia, Kuwait, Oman, Bahrain, Jordan, as well as multiple African and European markets, Our prepainted aluminium coils are available in various surface coatings, including polyester (PE), fluorocarbon (PVDF), and epoxy coatings, catering to diverse industry needs. Depending on coating thickness, we offer single-coated (4-20 microns), double-coated (25-28 microns), and triple-coated (35-38 microns) aluminium coils, ensuring durability and superior performance, QINGDAO SINCERELY Steel coils are widely used in roofing and cladding systems, ceilings, curtain wall panels, shutters, gutters, composite panels, cans, home appliance panels, and embossed aluminium applications. As one of the premier China suppliers and factory for prepainted aluminium coils, we pride ourselves on delivering exceptional quality Made in China products tailored to international specifications

What Is Zam?

China's innovative Zn-Al-Mg coated steel sheet, known as Zam, offers exceptional corrosion resistance. This advanced material features a unique coating composition that combines zinc as the primary substrate with approximately 11% aluminum, 3% magnesium, and trace amounts of silicon. The incorporation of aluminum, magnesium, and silicon enhances the steel's corrosion resistance, making it a superior choice compared to traditional hot-dip galvanized steel sheets and hot-dip galvanized-55% aluminum alloy steel sheets, which show similar corrosion resistance but with less adhesion.

Features Of Hot Dip Zn-Al-Mg Alloy Coated Steel

· Extended service life surpassing other coated products

· Exceptional cut edge rust protection, a signature feature of Zam

· Thinner, more protective coating that is ecologically friendly

· Outstanding performance in harsh environments, particularly coastal and agricultural areas

· Eliminates the need for additional post-dip (batch) galvanizing

· Enhanced formability due to the unique coating characteristics

· Significant cost savings through improved longevity and reduced maintenance

· Effectively bridges the gap between heavily coated galvanized products and expensive stainless steel options

Discover top-quality Zam from leading suppliers in China. Our factory produces reliable Zn-Al-Mg alloy coated steel designed to meet diverse industry needs.

Introducing our high-quality steel product, manufactured in China by reliable suppliers and factories. Our material composition includes a maximum carbon content of 0.15%, manganese at 0.60% max, phosphorus capped at 0.035%, and a sulfur limit of 0.040%.

Designed for superior performance, our steel boasts mechanical properties that ensure durability and strength, with a minimum yield strength of 38,000 PSI and a minimum tensile strength of 55,000 PSI. Trust in our China-based suppliers and factories to deliver top-notch products that meet your industrial needs.

SISCO provides high-quality hot dipped galvanized steel coils, a preferred choice across various industries in China, including automotive, construction, and appliance manufacturing. Our galvanized steel coils are essential for applications where rust resistance is critical. Compared to stainless steel, our cost-effective galvanized options offer reliable performance, making them a top choice among suppliers and manufacturers. The zinc coating on our hot dipped galvanized steel coils is designed to deliver exceptional protection against corrosion, ensuring longevity and durability, Our products are versatile and can be found in an array of applications, such as washing machines, refrigerators, flashing, ductwork, car components, drum containers, decking, HVAC systems, and more. SISCO's galvanized steel coils cater to the needs of residential, commercial, and industrial sectors, reinforcing our status as a leading factory in the steel industry. Choose SISCO for your galvanized steel needs and experience quality and affordability backed by our commitment to excellence

What is Zam?

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Zam (Zn-Al-Mg) is an innovative type of highly corrosion-resistant coated steel sheet, specifically designed for durability and longevity. This advanced coating features zinc as the primary substrate, combined with approximately 11% aluminum, 3% magnesium, and a trace amount of silicon. The incorporation of aluminum, magnesium, and silicon enhances the corrosion resistance of the steel, making it a superior choice compared to traditional hot-dip galvanized steel sheets and hot-dip galvanized-55% aluminum alloy sheets. While it has less adhesion, Zam offers equal corrosion resistance, making it a reliable option for various applications.

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Features of Hot Dip Zn-Al-Mg Alloy Coated Steel

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· Extended service life compared to other coated products

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· Cut edge rust protection - a standout characteristic of Zam

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· Thinner coating providing enhanced protection - an environmentally friendly choice

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· Superior performance in harsh environments, particularly in coastal and agricultural settings

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· Eliminates the requirement for post-dip (batch) galvanizing

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· Cost-effective solution through prolonged service life and reduced maintenance needs

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· Bridges the gap between heavily coated galvanized products and more expensive stainless steel

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As a leading product among China suppliers, our factory is committed to providing high-quality Zam steel sheets that meet the demands of modern industries.

Aluzinc steel, a leading choice among China suppliers, features a unique coating composition of 55% aluminum, 43.4% zinc, and 1.6% silicon. This innovative material is produced through a continuous hot dip galvanizing process, ensuring exceptional corrosion resistance. The aluminum coating provides a powerful barrier, while the zinc offers sacrificial protection, making Aluzinc an ideal solution for various applications. Its bright silvery surface is enhanced by small spangles, creating a lustrous appearance that changes with light conditions.

As the world’s fastest-growing metallic coating, Aluzinc combines the strength, formability, and recyclability of steel with the proven anti-corrosion performance of the AI-Zn alloy coating. This synergy results in an economical and eco-friendly product, boasting durability, recyclability, energy efficiency, and optimal resource utilization. When you choose our Aluzinc products, you are selecting a superior solution from a trusted factory in China committed to quality and innovation.

We manufacture Continuously Hot Dip Galvalume (GL) Coils adhering to the highest standards, ensuring you receive only the best. Trust our factory to meet your Aluzinc steel needs with reliability and excellence.

Discover high-quality steel products from reliable China suppliers. Our premium materials, including SPCC and MR grade, are designed to meet your industrial needs. We offer a range of tempers such as T1, T2, T3, T4, T5, DR8, and DR9, ensuring the right solution for every application.

Our tin-coated sheets come with a coating weight of 1.1 to 11.2g/㎡ and a thickness ranging from 0.15 to 0.70mm (with a tolerance of ±0.01 mm). The coils feature an inside diameter of 420/508mm and weigh between 1 to 3 MT, making them suitable for various manufacturing processes.

Choose from a variety of surface finishes, including Bright, Stone, Silver, Matte, and Gold Lacquered, to enhance the aesthetic appeal and performance of your products. As a trusted factory in China, we prioritize quality and efficiency to meet your demands perfectly.