PREPAINTED ALUZINC STEEL IN COILS System 1

PREPAINTED ALUZINC STEEL IN COILS System 2

PREPAINTED ALUZINC STEEL IN COILS

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Product Description:

Specification

1. Thickness: 0.3-0.8mm

2. Width: 914-1250mm

3. Inner Diameter: 508mm

4. Weight of Steel Coil: 3-15MT

5. Available Dipped Layer: 50-150g/m2

6. Surface Texture: Normal Coated

7. Type of coating structure: 2/1 Coat the top surface of the steel sheet twice, coat the bottom surface once, and bake the sheet twice.

8. Front Side Paint Thickness: 15-20μm (bottom paint+top paint)

9. Back Side Paint Thickness: 5-10μm

Mechanical Properties

1. Mechanical properties of base metals

Grade	Tensile Test
Grade	Yield Strength MPa	Tensile Strength MPa	Elongation A80mm % ≥
DC51D+Z	140-350	270-500	22
DC52D+Z	140-300	270-420	26
DC53D+Z	140-300	270-380	30

2. Common performance of front coating

(1). Thickness: ≥20μm

(2). Pencil Hardness: 2H

(3). 60° specular glossiness of coating: >60

(4). 180°bend: ≤3T

(5). Impact: ≥9J

(6). Salt Fog Resistant: ≥500h

(7). Color difference:<3ΔE

Q: How are steel coils protected against scratches and damage?: Steel coils are protected against scratches and damage through various methods such as applying protective coatings, using edge protectors, securely packaging them with appropriate materials, and ensuring careful handling during transportation and storage.

Q: I would like to know if steel is basically a very dense crystal, or if it is a different atomic structure: Steel Crystalline Structure

Q: What are the different types of welding used for steel coils?: Steel coil fabrication involves the utilization of various welding techniques, each catered to specific requirements and applications. Here, we present some commonly employed welding methods for steel coil fabrication: 1. Stick welding, also known as Shielded Metal Arc Welding (SMAW), utilizes a flux-coated electrode and an electric current to generate an arc between the electrode and the base material. SMAW is a versatile and extensively used technique suitable for a range of steel coil applications. 2. Gas Metal Arc Welding (GMAW), also referred to as MIG (Metal Inert Gas) welding, employs a continuous wire electrode and a shielding gas to safeguard the weld pool against atmospheric contamination. GMAW is renowned for its high welding speed and ease of automation, making it a favored choice for steel coil manufacturing. 3. Flux-Cored Arc Welding (FCAW) shares similarities with GMAW, but employs a tubular electrode with flux inside. The flux serves as both the shielding gas and added alloying elements, resulting in enhanced efficiency and weld quality. FCAW is often employed for high-speed welding applications in steel coil fabrication. 4. Gas Tungsten Arc Welding (GTAW), also known as TIG (Tungsten Inert Gas) welding, employs a non-consumable tungsten electrode and an inert gas, typically argon, to protect the weld area. GTAW delivers high-quality, precise welds with exceptional control over heat input, rendering it suitable for thin steel coil materials and critical welding scenarios. 5. Submerged Arc Welding (SAW) involves the use of a continuously fed wire electrode and a granular flux that covers the weld area. The arc is submerged beneath the flux, providing excellent protection and minimizing the need for post-weld cleaning. SAW is commonly employed for welding thick steel coils due to its high deposition rates and deep penetration capabilities. These examples highlight the diverse range of welding techniques employed in steel coil fabrication. The selection of the appropriate welding method depends on factors such as the specific steel grade, thickness, desired weld quality, production speed, and cost considerations. It is crucial to choose the suitable welding technique to ensure the longevity and performance of steel coils across different applications.

Q: How are steel coils processed for cutting to length or blanking?: Steel coils are processed for cutting to length or blanking through a series of steps. First, the coil is uncoiled and flattened to remove any inherent deformities. Then, the edges are trimmed to ensure uniform width and straightness. Next, the coil is fed into a leveling machine to eliminate any remaining inconsistencies in thickness. Once leveled, the steel is conveyed to a cutting machine where it is precisely cut into individual sheets of desired length or blanks. These sheets or blanks are then stacked and prepared for further fabrication or distribution.

Q: What dangers were there for the steel workers in Pittsburgh under Carnegie?: All manufacturing jobs of that era were incredibly dangerous, even textile work, but steel work was likely the worst. Men would fall into vats of molten metal, be crushed under huge metal bars, hit by cranes, burned by simple contact with any of the red hot pieces of metal flying all around, and most commonly, die from asphyxiation or lung ailments from the constantly burning fires. Heat stroke was a big killer, too. There was virtually no form of compensation, either for injured workers, or, in the case of death, for their families. The Bessemer method, which Carnegie introduced into the US, was hoped to improve conditions...instead, it merely improved output, and Carnegie's factories after 1900 worked 200,000 men, twelve hours a day, on wages that barely kept their families alive.

Q: case hardening steel is adviced or thru hardening steel is most suitable?: I don't know your application, but here is some advice. Case hard provides a hard shell around soft steel, depending on the bake, the case is usually .002-.008 thick. (thousands of an inch) Heat treated steel or tool steel is hard all the way thru. Case hardening, provides toughness with flexibility, however, once it's compromised, the part is scrap. Hardend tool steel is extreemly hard throughout and the harder it is, the more brittle it becomes. The application of the part will help you to determine the material needed. For instance; Plastic injection molds are very hard so the hot plastic wont erode them over years of use. Punch Press dies aren't as hard but are tougher to withstand the shock. Machine bolts are case hardened so they can last, but soft enough to allow some stretching during tightening. Either way, the time in mfg will be about the same. Most tool steels today cut like cheese, but take time to be heat treated. Tool steel will cost a bit more than low carbon steel. Low carbon steel is as machinable, and cheaper, but, again, the baking period is as long or longer than tool steel. There are a lot of materials on the market today that maintain the durability of heatreated steel without having to go thru that process. 4140, ( or chrome/moly) comes to mind. There are also some 400 series stainless that work as well, and others. You need to determine strength, flexibility, ease of mfg, cost and repairability when considering which steel to use.

Q: What are the different types of steel coil surface treatments?: There are several different types of steel coil surface treatments, including hot-dip galvanizing, electro-galvanizing, powder coating, and organic coating.

Q: What are the common coil packaging methods?: The common coil packaging methods include shrink wrapping, strapping, banding, and stretch wrapping.

Q: I was watching a documentary on the samurai vs the European knight. It said that the when Japan was being invaded by the (cant remember) they needed a new weapon. The enemies armor made iron swords useless. While steel swords broke when in combat. So to combat this the Japanese made a hybrid sword. They used a special mold that made the swords back iron while the part that makes contact with the enemy was steel. Also the sword was curved so it increased its armor and cutting power. This revolutionary design made the the sword stronger. The iron back made it not break while the steel edge made it cut through the enemies armor. I want to know how iron is stronger than steel, and how steel can cut better than iron.: Is Iron Stronger Than Steel

Q: How are steel coils used in the production of shipping containers?: Steel coils are used in the production of shipping containers as they serve as the primary material for constructing the container body. These coils are cut, shaped, and welded together to form the walls, roof, and floor of the container, providing strength, durability, and protection for the goods being transported.

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