• cold rolled steel coil for construction roofing System 1
  • cold rolled steel coil for construction roofing System 2
  • cold rolled steel coil for construction roofing System 3
cold rolled steel coil for construction roofing

cold rolled steel coil for construction roofing

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Loading Port:
Shanghai
Payment Terms:
TT OR LC
Min Order Qty:
36 m.t.
Supply Capability:
30000 m.t./month

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Classification

Designation

Characteristics

Main applications

Commercial quality

SPCC

SPCCT

Commercial quality suitable for bending fabrication and simple forming; this is thetype in greatest demand.

Refrigerators, cabinets, power distribution baords and drums.

Drawing quality

SPCD

Drawing quality second only tothat of SPCEN. Excellent uniformity.

Automobile floor and roof panels.

Deep-drawing quality

SPCE

SPCF

Deep-drawing quality.With metallurgically controlled grain size, it retains its beautiful finish even after being deep-drawn.

Automobile fenders and quarter panels

Extra deep-drawing quality

SPCG

Extra-low-carbon steel sheets with highest workability

Automobile internal panels and deep-drawn parts

 

 

 

Item

Thickness (mm)

Width(mm)

ID( mm)

Range

0.3~3.5

700~1850

508/610

Standard

Q/BQB403-2009

JIS G3141-2005

EN 10130-2006

ISO 3574-1999

JFS A2001-1998

EN10130-1999

Steel Grade

DC01

SPCC

DC01

CR1

JSC270C

ST12

DC03

SPCD

DC03

CR2

JSC270D

RRSt13(ST13)

DC04

SPCE

DC04

CR3

JSC270E

ST14

DC05

SPCF(SPCEN)

DC05

CR4

JSC270F

ST15

DC06

SPCG

DC06

CR5

JSC260G

ST16

DC07

-

DC07

-

-

Grade and appliances

Steel      Grade

Application

DC01(St12)

Normal

DC03(St13)

Drawing

DC04(St14)

Deep drawing

DC05(St15)

Special deep drawing

DC06(St16)

Extra deep drawing

DC07(St17)

Super Extra deep drawing

 

Q:How are steel coils inspected for weldability using welding tests?
A range of welding tests can be utilized to inspect steel coils for their weldability. The bend test is a common approach where a segment of the coil is cut and bent to assess the weld's quality. This evaluation helps identify any brittleness or flaws that could compromise its integrity. Furthermore, the guided bend test is conducted to evaluate the weld's ability to endure bending without cracking or breaking. Another technique employed is the macro etch test, which involves cutting a cross-section of the coil and applying a chemical solution to etch it. This test effectively exposes imperfections or irregularities in the weld, such as porosity, slag inclusions, or fusion deficiencies. Moreover, the hardness test measures the weld's hardness, which is crucial as excessive hardness can lead to cracking or brittleness, while insufficient hardness may cause weld failure under specific conditions. Additionally, non-destructive testing methods like ultrasonic testing, magnetic particle inspection, or radiographic examination can be employed to detect internal defects, such as cracks or voids, in the steel coil welds without causing any damage to the material. Conducting comprehensive inspections through these welding tests is essential to ensure the quality and weldability of steel coils before their use in various applications. By identifying and addressing potential issues, these inspections guarantee that the steel coils meet the necessary standards for weldability and structural integrity.
Q:How do steel coil manufacturers handle product recalls?
Steel coil manufacturers handle product recalls by following a systematic process. Firstly, they identify the specific batches or lots of steel coils that need to be recalled based on quality or safety concerns. Then, they promptly notify their distributors, customers, and regulatory authorities about the recall, providing all relevant information. The manufacturers work closely with these stakeholders to ensure that the affected coils are returned or replaced. Additionally, they investigate and address the root cause of the issue to prevent similar recalls in the future, implementing necessary quality control measures and process improvements.
Q:So I'm trying to decide which is better. I've always had aluminum on my 6 yr old tb gelding as I do hunters on him. He's never had steel on but I've recently moved and the shoer here is more expensive. So is aluminum really worth the extra cash to keep him light on his feet or is steel really not that much different?
It really depends on your horse. If you horse is a good mover, and average weight steel shoe shouldn't make much of a difference. If the horse is a mediocre mover, sometimes the added weight will make it move worse. You should also understand that one steel shoe is not like another steel shoe- they come in different widths of web and thickness of steel. Some horses that don't do well in regular shoes do better in a light rim shoe or training plate. Discuss your concerns with your farrier, but he/she doesn't have a crystal ball. You may just have to try steel for a cycle and see how your horse does. When I am shoeing a horse that needs lighter weight steel, I tend to use either St. Croix's Lite Rim shoe or steel Concord training plate, or Kerckaert's DR training plate or the Triumph Lite steel shoe. All of these shoes are light weight, have decent traction and good break over.
Q:For some reason, if you rub iron oxide or lodestone (both very crumbly, dark, mineral-like materials) into soft, unhardened steel, their particles actually get stuck into the surface of the steel (that is, darkening it). My question is, how does this work? How come iron oxide and lodestone can get stuck, and how come other materials (like silicone carbide, for example) do not?My second question is, are there any materials that can get stuck into steel, that is also blue in color, and how would I best obtain it?
the coloured metals that u often see are anodised, which means that their surface has reacted with air to form a protective, porous oxide coating. because it is so porous, highly-concentrated dyes can be injected into them to colour them.
Q:In terms of weight to strength titanium is stronger. But is it stronger than mild steel? If it is stronger, how much stronger is it?
Contrary to what we are usually told, Ti weight to strength ratio is better only for lower strength alloys. Steels match or best Ti and Al alloy ratio's for high strengths. Hard to answer this question, due to varying effects of cold work, alloying, and heat treatments. In general, traditional mild steels with little cold work are about equivalent strength to commercially pure Ti. Cleverly selected mild steels with extensive cold work have greater UTS (and really greater SMYS) than commercially pure Ti, and approach strength of the best Ti alloys. Ti starts at about 60ksi UTS for commercially pure, and goes up to about 200ksi for high strength alloys. Mild steel has varying definitions. Plain carbon steels use virtually no alloying materials other than carbon. Low carbon steels starting in the 1008 (0.08% carbon) range can be cold worked to 100ksi UTS, while 1030, the maximum carbon for mild steel per one source, can be cold worked up to about 180ksi. Simple steels can go about 215 ksi UTS at fairly reasonable cost with lesser cold work than I was using because producers can't make stronger steels with higher degrees of cold work. High strength alloys can best 350ksi at impressively high cost. (and they match best titanium alloy strength to weight ratio). They are why wide body aircraft have lots of steel - landing gears, flap mechanisms, etc. Don't know about cold working Ti though. It doesn't seem to be done much, but difficult to find info.
Q:can u use stainless steel to make a coin? why or why not? answers based on facts plz.
Stainless steel has been used by some countries to make coins, but it's not an ideal metal. When a coin is struck, a die comes down and strikes the blank with many tons of force (the blank is also sitting on top of another die--one has the image on the obverse (front) of the coin, while the other die has the image of the reverse of the coin). When the die strikes the blank, the force causes the metal in the blank to flow into the recesses of the die. The problem with stainless steel is that it doesn't want to flow into the die. To get an image, either the relief (how high the raised portion of the design will be) has to be very low, and the coin has to have a simple design, or they have to greatly increase the pressure of the strike. This slows the coining press down, and greatly shortens the life of the dies.
Q:What are the factors affecting the formability of steel coils?
There are several factors that can affect the formability of steel coils. Some of the key factors include the composition of the steel, its mechanical properties, the thickness and width of the coils, the temperature at which the forming process takes place, the type and amount of lubrication used, and the speed and pressure applied during forming. Additionally, the presence of defects or impurities in the steel can also impact its formability.
Q:How are steel coils formed into specific shapes?
Steel coils are formed into specific shapes through a process known as coil slitting and coil forming. Coil slitting involves unwinding a large steel coil and passing it through a series of rotating circular blades, which cut the coil into narrower strips of the desired width. These strips are then rewound into smaller coils, known as slit coils. Once the steel has been slit into narrower strips, it can undergo coil forming to achieve specific shapes. Coil forming typically involves a combination of processes such as roll forming, stamping, bending, or pressing. Roll forming is a common method where the steel strip is passed through a series of rollers that gradually shape it into the desired profile. Each roller is designed to gradually bend the strip in a specific way, ultimately creating the desired shape. Stamping is another method used in coil forming, where the steel strip is fed through a machine that uses a die and a press to cut or shape the metal into the desired form. This process is typically used for more intricate shapes or when high precision is required. Bending and pressing are also common techniques used to form steel coils into specific shapes. Bending involves using a machine or tool to apply force and manipulate the steel strip into the desired curvature or angle. Pressing, on the other hand, involves using a hydraulic or mechanical press to exert pressure on the steel strip, causing it to be shaped according to the design of the mold or die. Overall, the formation of steel coils into specific shapes involves a combination of coil slitting and coil forming techniques. These processes, such as roll forming, stamping, bending, or pressing, allow manufacturers to transform steel coils into a wide range of shapes and profiles, catering to various applications in industries such as construction, automotive, and manufacturing.
Q:Can steel coils be used in outdoor applications?
Yes, steel coils can be used in outdoor applications. Steel is known for its durability and resistance to harsh environmental conditions, making it suitable for outdoor use. Additionally, steel coils are often coated or treated to further enhance their corrosion resistance, making them well-suited for various outdoor applications such as construction, automotive, and manufacturing industries.
Q:What are the different methods of leveling steel coils?
There are several methods used to level steel coils, including roller leveling, stretcher leveling, and tension leveling. Roller leveling involves passing the coil through a series of rollers that gradually bend and flatten the steel to remove any curvature or unevenness. Stretcher leveling uses hydraulic or mechanical forces to stretch the steel in order to eliminate any residual stress and improve flatness. Tension leveling applies tension to the steel coil while it is being passed through a series of rolls, which helps to remove any waviness or shape defects. These methods are employed depending on the specific requirements and desired flatness of the steel coils.

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