Prepainted Rolled Steel Coil For Construction Roofing Constrution
- 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 defects using non-destructive testing methods?
- To ensure the quality and integrity of steel coils, non-destructive testing (NDT) methods are employed to inspect them for surface defects. Several common NDT methods are utilized in this process. Visual inspection is one of the most widely used methods, where trained inspectors visually examine the steel coils for visible defects like scratches, cracks, pits, or corrosion. Although this method is simple and cost-effective, it can only detect surface-level defects. Magnetic particle testing (MT) is another commonly used NDT method. It utilizes magnetism to identify surface and near-surface defects in ferromagnetic materials like steel. By applying a magnetic field and iron particles to the steel coil, any defects such as cracks or discontinuities become visible as the iron particles concentrate around them. Liquid penetrant testing (PT) is a different NDT method used for inspecting steel coils. It involves applying a liquid penetrant to the coil's surface, which is drawn into surface defects through capillary action. After removing excess penetrant and applying a developer, the defects become visible as the developer draws out the penetrant. Ultrasonic testing (UT) is widely used to detect both surface and subsurface defects in steel coils. It transmits high-frequency sound waves into the coil and analyzes the reflected waves to identify abnormalities. This method can detect defects like cracks, inclusions, and voids that may not be visible to the naked eye. Additionally, eddy current testing (ECT) is another NDT method for inspecting steel coils. It utilizes electromagnetic induction to detect surface and near-surface defects. By placing a coil carrying an alternating current near the surface of the coil being inspected, any changes in the coil's electrical conductivity caused by surface defects are detected and analyzed to identify and evaluate their severity. In summary, various non-destructive testing methods such as visual inspection, magnetic particle testing, liquid penetrant testing, ultrasonic testing, and eddy current testing are utilized to inspect steel coils for surface defects. These methods ensure the quality and integrity of the steel coils before they are used in various applications.
- Q:What are the common methods of slitting steel coils?
- There are several common methods of slitting steel coils, each with its own advantages and applications. 1. Rotary Shear Slitting: This method involves using rotary cutting knives to slit the steel coil. The coil is fed through the rotary shear machine, and the knives make simultaneous cuts along the length of the coil. Rotary shear slitting is known for its high-speed operation and ability to handle thicker gauge materials. 2. Loop Slitting: Loop slitting is a method where the steel coil is fed into a looping pit, creating a loop of material. The loop is then pulled through a set of knives that make the slits. This method is commonly used for thin gauge materials and provides precise cuts with minimal burr. 3. Drag Slitting: In drag slitting, the steel coil is fed through a set of driven rolls or drag pads, which help to maintain tension on the material. The coil is then guided through circular knives that make the slits. Drag slitting is suitable for various gauges of steel and offers good accuracy and edge quality. 4. Crush Slitting: Crush slitting involves passing the steel coil through a set of rolls, where one roll is rubber-covered and the other is hard. The rubber roll compresses the material against the hard roll, creating the slits. This method is commonly used for thin gauge or delicate materials as it minimizes the risk of edge damage. 5. Laser Slitting: Laser slitting utilizes a high-powered laser beam to make precise cuts on the steel coil. This method is highly accurate and allows for complex slitting patterns and narrow width cuts. Laser slitting is often used for high-end applications that require superior edge quality. Each of these methods has its own advantages and is chosen based on factors such as material thickness, desired edge quality, production speed, and cost considerations. It is important to carefully select the appropriate slitting method to ensure the desired outcome and efficiency in steel coil processing.
- Q:How are steel coils protected from humidity?
- Steel coils are typically protected from humidity through a process called galvanization, where a layer of zinc or another protective coating is applied to the surface of the steel. This coating acts as a barrier, preventing moisture from coming into direct contact with the steel and minimizing the risk of corrosion. Additionally, steel coils are often stored in dry, enclosed spaces or wrapped with moisture-resistant materials such as plastic or wax paper to further protect them from humidity.
- Q:How are steel coils used in the production of electrical resistors?
- Steel coils are used in the production of electrical resistors as they provide a conductive material that can withstand high temperatures. The steel coil is wound into a spiral shape to increase the length of the wire, which in turn increases the resistance. This allows the resistor to regulate the flow of electric current in a circuit, providing the desired level of resistance.
- Q:How are steel coils inspected for surface cleanliness using cleanliness tests?
- Steel coils are inspected for surface cleanliness using cleanliness tests through various methods such as visual inspections, magnetic particle inspections, and solvent extraction tests. Visual inspections involve visually examining the surface of the steel coils for any visible contaminants or defects. Magnetic particle inspections use magnetic particles that are applied to the surface of the coils, and if there are any defects or contaminants present, the particles will accumulate and make them visible. Solvent extraction tests involve using a solvent to extract any contaminants from the surface of the steel coils, and then analyzing the extracted solution to determine the level of cleanliness. These tests help ensure that the steel coils meet the required standards for surface cleanliness.
- Q:What kind of insulation should be used in a steel building?
- Fiberglass batts or spray on foam both work well
- Q:We all know that when we drop a small steel ball (size 3mm diameter; weight 1.10 grams) and a paper (size 11.7 inches length and 8.3 inches breadth; weight 4.5 grams) from a height. The steel ball will win the race to the ground due to its aerodynamic structure.Now imagine the same steel ball with the same weight converted to the structure similar that of paper. What will be the result? Which object will fall first; steel sheet or paper?
- In okorder /... 11.7x8.3 inch paper 97.11 square inches 0.062651488 sq meters at 4.5gm is a non-standard 19 pound bond ledger paper, but that is OK, because at least it is in range. 38 gauge steel sheets are about the thinnest that hold their structure 0.00625 thick 1221 g/m? or, at 11.7x8.3 76.5grams So, with this data at hand we can better visualize the situation. Paper of 0.00625 thick in the size shown is 35# paper 131.68 g/m? 8.25grams Steel is higher in density than paper, so you cannot get the same size and air flow without it being lighter in weight than the steel and the air resistance would be lower for the heavier item, so steel of the same shape and thickness as paper falls faster. Suppose you want paper heavier than steel for the same area, then the thickness increases. Will a steel sheet 0.00625 thick and 11.7x8.3 inch size 76.5gm fall faster or slower than a 9 or 10 times thicker paper sheet? If it was able to hold flat in each type the thicker paper should get more backflow behind it aerodynamically and fall faster than an equal weight thinner steel sheet as my guess, but I don't have those numbers. The steel will always be heavier than the paper for the same exact shape and thickness by about 9x. My answer here is difficult, but the question has some flaws to think about.
- Q:Can steel coils be stored in a humid environment?
- Steel coils should not be stored in a humid environment as it can lead to corrosion and damage to the steel.
- Q:How are steel coils inspected for flatness variations?
- Steel coils are inspected for flatness variations using specialized equipment such as laser or optical scanning systems. These systems measure the surface profile of the coil and identify any deviations from the desired flatness. The data collected is then analyzed to determine the extent of the variations and whether they meet the required tolerances.
- Q:Having a greater amount than 2% carbon in steel causes steel to suddenly become brittle. Why is this?
- Carbon fiber has better tensile capability then steel meaning its better while pulled aside. Plus you could mould the fiber to make autos-or homes-out of carbon fiber.
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Prepainted Rolled Steel Coil For Construction Roofing Constrution
- 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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