Prepainted Rolled Steel Coil for Construction Roofing Use
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 50 m.t.
- Supply Capability:
- 30000 m.t./month
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Structure of Prepainted Rolled steel Coil for Construction Roofing
Description of Prepainted Rolled steel Coil for Construction Roofing
Prepainted Rolled steel Coil is a kind of coated steel coil/sheet. With the cold rolled steel of different strength and thickness as substrate, it is produced through applying Al-Zn coat on both faces by hot dip process. In its coating, Al accounts for about 55%, Si 1.6%, while the remaining is Zn. Aluminum zinc coils enjoys both the physical protective feature and durability of Al and the electrochemical protective property of Zn. And its surface has bright silver color and regular embossed-like figure, which are highly decorative.
Main Feature of Prepainted Rolled steel Coil for Construction Roofing
1.Corrosion resistance: It mainly depends on the aluminum protection. When the zinc being worn, the aluminum will form a dense layer of aluminum oxide, resist corrosion material to prevent further corrosion inside.
2. Heat resistance: Aluminum zinc alloy steel sheet has excellent heat resistance, can withstand high temperatures over 300 centigrade, and is similar with aluminized steel high temperature oxidation resistance. It often used in chimney pipes, ovens, fluorescent lighting device and the device cover.
3. Heat reflective: Galvanized steel plate heat-reflective high rate is twice as galvanized steel, often used to make insulation materials.
4. Economy: Because density of 55% AL-Zn is smaller than the density of Zn, so in the same weight and thickness of Galvanized zinc layer, aluminum-zinc steel plate is larger area more than 3% of galvanized steel sheet.
Applications of Prepainted Rolled steel Coil for Construction Roofing
1. Construction and building: roofing; ventilating duct; handrail; partition panel;etc.
2. Electric appliance: refrigerator; washing machine; refrigerator; DVD;etc.
3.Transportation: oil tank; road sign; etc.
4.Agriculture:barn; etc.
5.Others:vending machine; game machine; etc.
Specifications of Rolled steel Coil for Construction Roofing
Product | Prepainted Rolled steel Coil for Construction Roofing |
Material Grade | SGCC / SGCH / DX51D+AZ, etc |
Thickness | 0.2-3.0mm |
Width | 600-1500mm |
Tolerance | Thickness: +/-0.02mm , Width:+/-2mm |
Zinc-coating | AZ40-150g/m2 |
Technique | Raw material: Hot rolled steel coil --> Cold rolled_>hot dipped galvalume |
Surface | Dried, Chromated, Unoiled |
Spangle | Regular spangle , small spangle, zero spangle |
ID | 508MM |
Coil weight | 10MT max |
Export package | Cardboard inner sleeves, Waterproof paper, galvanized steel covered and steel strip packed |
FAQ of Prepainted Rolled steel Coil for Construction Roofing
We have organized several common questions for our clients，may help you sincerely：
1. What is the minimum order quantity ?
Our MOQ is 50mt for each size. And we will consider to give more discount if you make big order like 1000 tons and more. Further more, the more appropriate payment term your offer the better price we can provide.
2. How long can we receive the product after purchase?
Usually within thirty working days after receiving buyer’s advance payment or LC. We will arrange the factory manufacturing as soon as possible. The cargo readiness usually takes 15-25 days, but the shipment will depend on the vessel situation.
3. How to guarantee the quality of the products？
We have established the international advanced quality management system，every link from raw material to final product we have strict quality test；We resolutely put an end to unqualified products flowing into the market. At the same time, we will provide necessary follow-up service assurance.
- Q:How are steel coils inspected for surface finish variations?
- Steel coils are inspected for surface finish variations using visual examination, mechanical methods such as gauges and calipers, and non-destructive testing techniques like magnetic particle inspection or ultrasonic testing.
- Q:How are steel coils inspected for chemical composition using spectroscopy?
- Steel coils can be inspected for their chemical composition using spectroscopy, specifically techniques like X-ray fluorescence (XRF) or laser-induced breakdown spectroscopy (LIBS). In XRF, an X-ray beam is directed onto the surface of the steel coil, causing the atoms in the sample to emit characteristic X-ray fluorescence radiation. By analyzing the energy and intensity of these emitted X-rays, the elemental composition of the steel can be determined. XRF is a non-destructive and rapid technique, allowing for quick and accurate assessment of the chemical composition of the steel coil. LIBS, on the other hand, involves focusing a laser beam onto the surface of the steel coil, creating a high-temperature plasma. The plasma emits light, which is then collected and analyzed using a spectrometer. The emitted light contains characteristic atomic and ionic emissions, allowing the identification and quantification of various elements present in the steel. LIBS is also a non-destructive technique, providing real-time results and requiring minimal sample preparation. Both XRF and LIBS offer advantages in terms of speed, non-destructiveness, and ease of use for inspecting steel coils for their chemical composition. These spectroscopic techniques play a crucial role in quality control and assurance, ensuring that the steel meets the required specifications and standards for various industrial applications.
- Q:How are steel coils used in the production of automotive body panels?
- Steel coils are used in the production of automotive body panels by being fed into a stamping press, where the coils are shaped and cut into the desired panel shapes. The high strength and durability of steel make it an ideal material for automotive body panels, providing protection and structural integrity to the vehicle.
- Q:In construction, what types of stress require steel to be placed in footings?
- Shear and bending stress.
- Q:What are the different methods of testing steel coils for quality control?
- Steel coils undergo various methods for quality control testing to ensure they meet the necessary specifications and standards. These methods encompass visual inspection, dimensional measurement, hardness testing, tensile strength testing, chemical analysis, coating thickness measurement, surface roughness measurement, ultrasonic testing, and magnetic particle inspection. Visual inspection is the most fundamental technique, involving a thorough examination of the coils for surface defects like scratches, dents, or irregularities. This method enables the identification of visible defects in the material. Dimensional measurement, on the other hand, utilizes tools such as calipers, micrometers, or laser measuring devices to evaluate the dimensions of the steel coils. The measurements are compared against specified tolerances to ensure they meet the required standards. To assess the resistance of the steel coils to indentation or penetration, hardness testing is performed. This examination helps evaluate the material's strength and durability. Common hardness testing methods include Rockwell, Brinell, and Vickers hardness tests. Tensile strength testing measures the maximum tensile stress a steel coil can endure before breaking or deforming. This test helps determine the material's strength, elasticity, and compliance with the required specifications. Chemical analysis is crucial in testing the composition of the steel coils to verify the presence of specific elements in the desired amounts. This ensures that the coils are made from the correct grade of steel and comply with the required chemical composition standards. In cases where the steel coils have a protective coating, it is vital to measure the thickness of the coating. Non-destructive testing methods like magnetic induction or eddy current testing are typically employed for this purpose. The coating thickness is compared against the specified requirements to ensure it provides adequate protection. Surface roughness testing evaluates the smoothness or roughness of the steel coil's surface using instruments like profilometers or roughness testers. This testing method guarantees that the coils meet the required surface finish standards. Ultrasonic testing utilizes high-frequency sound waves to detect internal defects like cracks, voids, or inclusions within the steel coils. This non-destructive testing method provides valuable information about the structural integrity of the coil. Magnetic particle inspection is employed to identify surface and near-surface defects in steel coils. By applying magnetic particles to the surface and detecting any magnetic leakage caused by defects using magnetic sensors, this technique effectively detects cracks and other surface abnormalities. By combining these testing methods, manufacturers ensure that the steel coils produced meet the necessary quality standards and are suitable for their intended applications.
- Q:How do steel coils contribute to the aerospace manufacturing industry?
- Steel coils are essential in the aerospace manufacturing industry as they are used to produce various components, such as aircraft bodies, wings, and landing gear. These coils provide the necessary strength, durability, and resistance to extreme conditions required for aerospace applications. Additionally, steel coils can be easily shaped and welded, enabling manufacturers to create complex and precise structures, thereby enhancing the safety and efficiency of aircraft.
- Q:What are the different surface finishes of steel coils?
- There are several different surface finishes of steel coils, including mill finish, galvanized finish, painted finish, and coated finish.
- Q:What are the common coil thickness tolerances?
- The common coil thickness tolerances can vary depending on the specific industry and application. However, in general, common coil thickness tolerances range from +/- 0.001 to +/- 0.010 inches.
- Q:What is the cost of steel coils?
- The cost of steel coils can vary depending on factors such as size, quality, and market conditions. It is best to contact a supplier or check current market prices to get an accurate cost.
- Q:What are the main factors that affect the corrosion resistance of steel coils?
- The main factors that affect the corrosion resistance of steel coils include the composition of the steel, the presence of impurities, the surface finish, the environmental conditions, and the protective coatings applied to the steel.
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Prepainted Rolled Steel Coil for Construction Roofing Use
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 50 m.t.
- Supply Capability:
- 30000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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