Hot dip galvanized steel coil & sheet System 1

Hot dip galvanized steel coil & sheet

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Commodity	Hot dip galvanized steel coil and sheet
Technical Standard:	JIS 3302 / ASTM A653 / EN10143
Grade	DX51D / DX52D/ DX53D/ S250,280,320GD
Types:	Commercial / Drawing / Deep Drawing / Structural quality
Width	500/650/726/820/914/1000/1200/1219/1220/1250mm
Thickness	0.12-2.8mm
Type of coating:	Galvanized
Zinc coating	Z30-275g/m2
Surface Treatment	Chromed / Skin-pass/ Oiled/Slightly Oiled/ Dry/ Anti-fingerprint
Surface structure:	Zero spangle / minimized spangle / regular spangle/ big spangle
ID coil	508mm or 610mm
Coil weight	3-8 MT per coil
Package:	Properly packed for ocean freight exportation in 20''containers
Application:	Industrial panels, roofing and siding for painting
Price terms	FOB,CFR,CIF
Payment terms	T/T or L/C
Delivery time	Within 30 days
Remarks	Insurance is all risks
	MTC will be handed on with shipping documents
	We accept the third party certification test,such as SGS/BV

Technicaldata :

Hot dipped galvanized coil Technical Data

Chemical Composition
GRADE	C	Si	Mn	P	S	Ti
SGCC/DX51D+Z	≤0.10	≤0.50	≤0.60	≤0.10	≤0.030	≤0.020
DX52D+Z	≤0.10	≤0.50	≤0.60	≤0.10	≤0.030	≤0.020
SGCD/DX53D+Z	≤0.10	≤0.30	≤0.50	≤0.05	≤0.030	≤0.020
SGCE/DX54D+Z	≤0.10	≤0.30	≤0.30	≤0.03	≤0.020	≤0.020
DX56D+Z	≤0.10	≤0.30	≤0.30	≤0.03	≤0.020	≤0.020
Structural	≤0.20	≤0.60	≤1.70	≤0.10	≤0.045

Hot dipped galvanized steel coil Mechanical Properties
GRADE	Yield Strength MPa	Tensile Strength MPa	Elongation %
SGCC(DX51D+Z)	≥205	≥270	-
SGCD(DX53D+Z)	-	≥270	38
SGCE(DX54D+Z)	-	≥270	40
DX56D+Z	-	≥270	42

Q: Don't ask me why, but I took my stainless steel ring and I heated it up with my gas stove. I stuck it in there til the metal turned red, and the flame which is normally blue turned orange for some reason when the metal turned red. Anyway, afterwards i cooled it off in water and now it's all discolored and it feels different. It's weighs less and it doesn't feel the same. Plus, it's ugly cause it's all black and blue. What happened? Someone help: Stainless steel has a rating. I don't know what your ring's stainless steel rating is. If you know, you can look it up. The rating will tell you how much steel vs other metal it has (usually Cr and Ni). But usually when you heat the stainless steel to extreme temperature it will discolor due to oxidation. What is worse is that you cooled it off in water (I assumed that you did it while it was still hot). By rapid cooling, you have changed the physical structure of the steel itself. It will change the hardness of the steel. That is why it feels different. Look up on annealing, normalizing, quenching and tempering under heat treatment for steel.

Q: Steel or stainless steel: Steel often has impurities that can generate fumes, which cause a fever identical to smoke inhalation. You always need to be concerned about what you are breathing around hot metal.

Q: Correct me if I am wrong, but steel is an alloy between iron and carbon. Does the carbon in the steel stops the iron from rusting or corroding? Also what is the difference between mild steel and stainless steel?: Mild steel is an alloy. It is the most common form of steel. Mild steel (a so-called carbon steel) is a general term for a range of low carbon (a maximum of about 0.3%) steels that have good strength and can be bent, worked or can be welded into an endless variety of shapes for uses from vehicles (like cars and ships) to building materials. The carbon does not stop the material rusting or corroding. In addition to iron, carbon, and chromium, modern stainless steel may also contain other elements, such as nickel, niobium, molybdenum, and titanium. Nickel, molybdenum, niobium, and chromium enhance the corrosion resistance of stainless steel. It is the addition of a minimum of 12% chromium to the steel that makes it resist rust, or stain 'less' than other types of steel. The chromium in the steel combines with oxygen in the atmosphere to form a thin, invisible layer of chrome-containing oxide, called the passive film. The sizes of chromium atoms and their oxides are similar, so they pack neatly together on the surface of the metal, forming a stable layer only a few atoms thick. If the metal is cut or scratched and the passive film is disrupted, more oxide will quickly form and recover the exposed surface, protecting it from oxidative corrosion.

Q: Why people prefer prefabricated buildings these days? Recently my friend has told me that he is going to owe a steel house so I was just thinking are these steel structures really durable and cheaper than concrete structures?: It really depends upon the environment and the construction techniques used. Steel that is painted or coated will without maintenance eventually rust. I would expect this tendency to be exacerbated in a humid or shore environment. Heat may tend to cook a steel house and the structure does not add much thermal mass. Construction techniques tend to be fairly quick a part of the construction is essentially prefabricated. Work done in a factory will almost always be cheaper than work done in the field, all things being equal. Concrete can be fairly hi tech with lots of equipment or as seen in many parts of the world fairly low tech with lots of laborers. It is easy to change the characteristics of concrete depending upon how it is mixed, reinforced, and treated during the curing process. Because it is applied in a relatively fluid state it can flow around obstructions like bedrock and be formed up into interesting shapes. A concrete structure can be cooler as it provides thermal mass, and a heat sink. It's resulting rigidity may make it more subject to earthquakes than steel. We do really need to be smarter in constructing our homes to make them fit the land and not only the general environment but our particular micro environment.

Q: How are steel coils tested for strength and durability?: Steel coils are typically tested for strength and durability through a series of rigorous procedures such as tension and compression tests, hardness tests, and impact tests. These tests help determine the coil's ability to withstand various loads and impacts, ensuring that it meets the required strength and durability standards. Additionally, other tests like fatigue tests and corrosion resistance tests may also be conducted to further assess the coil's performance and longevity.

Q: How are steel coils inspected for edge quality?: Steel coils are inspected for edge quality through a combination of visual inspection and non-destructive testing methods. Visual inspection involves a thorough examination of the edges of the coils to identify any visible defects such as cracks, chips, or uneven edges. This is typically done by trained inspectors who carefully inspect the entire length of the coil. Non-destructive testing methods are also used to detect any hidden defects or imperfections in the edges of the steel coils. These methods include ultrasonic testing and magnetic particle inspection. Ultrasonic testing involves the use of high-frequency sound waves to identify any internal flaws or discontinuities in the steel. Magnetic particle inspection, on the other hand, uses magnetic fields and particles to identify any surface or near-surface defects in the steel. Both visual inspection and non-destructive testing methods play a crucial role in ensuring the edge quality of steel coils. By conducting these inspections, manufacturers can identify and address any defects or imperfections in the edges of the coils, ensuring that they meet the required quality standards.

Q: What are the different methods of coil end welding for steel coils?: Steel coils can be welded together using various methods. Some of these methods include: 1. Resistance Welding: By applying an electric current to the coil ends, the heat causes them to melt and join. This method is popular for its efficiency and speed. 2. Laser Welding: A high-energy laser beam is used to melt and fuse the coil ends precisely. This technique ensures high-quality welds. 3. Tungsten Inert Gas (TIG) Welding: TIG welding creates a protective atmosphere around the welding area using a non-consumable tungsten electrode and an inert gas like argon. It produces clean and strong welds, making it suitable for steel coil end welding. 4. Plasma Arc Welding: This method involves using a plasma torch to create an electric arc between the electrode and the workpiece. The intense heat generated melts the coil ends for welding. 5. Electron Beam Welding: A high-velocity beam of electrons heats and melts the coil ends. This technique is used for thick steel coils and offers deep penetration and high welding speed. 6. Friction Stir Welding: By using a rotating tool to generate friction and heat, the coil ends soften and fuse together. Although commonly used for joining aluminum coils, it can also be applied to steel coils. These are just a few examples of the different methods available for welding steel coil ends. The choice of method depends on factors such as desired weld quality, production speed, material thickness, and application requirements.

Q: What are the different methods of coil handling and storage?: There are several different methods of coil handling and storage that are commonly used in various industries. These methods are designed to ensure the safe and efficient handling of coils, as well as their storage to prevent damage and maintain their quality. Some of the different methods include: 1. Coil cradles: Coil cradles are a popular method of handling and storing coils. They are typically designed with a U-shaped structure that provides support and stability to the coil. The cradle is placed beneath the coil, and it can be easily moved using forklifts or overhead cranes. 2. Coil cars: Coil cars are used to transport coils within a facility or from one location to another. They are equipped with special clamps or arms that securely hold the coil during transportation. Coil cars can be operated manually or automatically, depending on the size and weight of the coils. 3. Coil racks: Coil racks are storage systems that are specifically designed for storing coils in an organized manner. These racks are typically made of steel and have multiple levels or compartments to accommodate different sizes and types of coils. Coil racks can be accessed using forklifts or overhead cranes. 4. Coil turnstiles: Coil turnstiles are rotating devices that allow for easy loading and unloading of coils. They are often used in processing lines where coils need to be continuously fed into machines. The turnstile rotates the coil to the desired position, making it easier to handle and process. 5. Coil pallets: Coil pallets are specially designed pallets that are used to store and transport coils. They are typically made of steel or wood and have a unique configuration that allows for easy loading and unloading of coils using forklifts or pallet jacks. Coil pallets are often used when coils need to be transported long distances or stored in warehouses. 6. Coil storage racks: Coil storage racks are large storage systems that are specifically designed to store coils in bulk. These racks are typically made of steel and have multiple levels or compartments to accommodate a large number of coils. Coil storage racks can be accessed using forklifts or overhead cranes. These are just some of the different methods of coil handling and storage that are commonly used in various industries. The specific method used will depend on factors such as the size and weight of the coils, the available space, and the specific requirements of the industry.

Q: How are steel coils used in the production of household appliances?: Steel coils are used in the production of household appliances as they serve as the primary material for manufacturing various components such as the outer body, frame, and internal structures. These coils are formed into different shapes and sizes, allowing for the creation of durable and robust appliances. The steel coils provide strength, stability, and resistance to wear and tear, ensuring the longevity and reliability of the appliances.

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