Prime Cold Rolled Steel Coils in China/ Chinese supplier

Prime Cold Rolled Steel Coils in China/ Chinese supplier

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 23 m.t.

Supply Capability:: 50000 m.t./month

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Specification

Standard:

ASTM,JIS,EN,GB,DIN

Technique:

Hot Rolled

Shape:

Round

Surface Treatment:

Dry

Steel Grade:

SS400-SS490,Q235,Q215,Q195

Certification:

CE,BV,ISO,SGS

Thickness:

1.8mm-16mm

Width:

1000mm-1600mm

Length:

according to weight

Net Weight:

23mt

Packaging:

Standard Export Packing

Hot rolled steel coil

1. Specifications about stainless steel sheet

Commodity	ss 304 304L hot rolled cold rolled stainless steel coil
Grade	201,202,304,304L,316,316L,310S,309S,321,301,310,410,420,430,904L
Brand	TISCO ,BAOSTEEL,POSCO,JISCO,LISCO
Certification	SGS,BV,IQI,TUV,ISO,etc
Thickness	0.3-120mm or as demand
Width	1000-2000mm or as demand
Length	1000-6000mm or as demand
Surface	No.1, 2B, BA, 8K Mirror, Hairline,satin, Embossed,brush,No.4,HL,matt,pvc film,laser film.
Standard	ASTM,AISI,SUS,JIS,EN,DIN,GB, ASME,etc
Delivery time	3-5 days after confirming the order
MOQ	1 Ton
Advantages	Showing the splendor of your quality, wearresistant as well , strong corrosion resistance and decorative effect, durable and beautiful in good taste.

2. Chemical Composition about stainless steel sheet

Grade	C	Mn(Max)	P(Max)	S(Max)	Si(Max)	Cr(Max)	Ni(Max)	Mo(Max)
201	0.15	5.5-7.5	0.06	0.03	1	16.0-18.0	3.5-5.5
202	0.15	7.5-10.5	0.06	0.03	1	17.0-19.0	4.0-6.0
304	0.08	2	0.045	0.03	1	18.0-20.0	8.0-10.5
304L	0.03	2	0.045	0.03	1	18.0-20.0	8.0-12.0
310S	0.08	2	0.045	0.03	1.5	24.0-26.0	19.0-22.0
316	0.08	2	0.045	0.03	1	16.0-18.0	10.0-14.0	2.0-3.0
316L	0.03	2	0.045	0.03	1	16.0-18.0	10.0-14.0	2.0-3.0
317	0.08	2	0.045	0.03	0.75	18.0-20.0	11.0-14.0	3.0-4.0
317L	0.03	2	0.045	0.03	0.75	18.0-20.0	11.0-15.0	3.0-4.0
321	0.08	2	0.045	0.03	0.75	17.0-19.0	9.0-12.0
409	0.08	1	0.04	0.01	1	10.5-11.75	0.5
410S	0.08	1	0.04	0.03	1	11.5-13.5	0.6
410	0.15	1	0.04	0.03	1	11.5-13.5	0.75
420	0.35	0.5	0.035	0.015	0.5	12.0-13.0	0.2-3.0

3. Production Flow about stainless steel sheet

Raw materials are sending to hot rolling units for rolling into different sizes

Hot rolled material is annealing in cold; rolled annealing furnace and pickling in acid.
All mill rolls are grinded on precision grinding machine with proper chamfering after first shiftoperation.
All sheets are pickled in different tanks and dried on brush roll machine before dispatched.
These sheets are again annealing and are sent to straighten machine for straightening.
Inspections are done at various stages. Keep proper control overall internal process via rolling,annealin and pickling by our experienced staff.

Products Picture

ss 304 304L hot rolled cold rolled stainless steel coil

Q: How are steel coils used in the production of metal enclosures?: Steel coils are widely used in the production of metal enclosures due to their versatility and strength. These coils, which are typically made from high-quality steel, serve as the primary raw material for manufacturing metal enclosures. Firstly, the steel coils are unrolled and flattened to the desired thickness using specialized machinery. This process ensures that the coils are in a suitable form for further processing. The flattened steel is then cut into specific sizes and shapes, depending on the design requirements for the metal enclosure. Next, the cut steel pieces are formed into the desired shape using various techniques such as bending, folding, and welding. These processes allow the steel to be molded into the required dimensions and structure of the metal enclosure. The inherent strength and durability of the steel coils ensure that the final product is sturdy and can withstand external forces or impacts. Additionally, steel coils can be coated with protective layers such as galvanization or powder coating to enhance their resistance to corrosion, rust, or other environmental factors. This coating helps to prolong the lifespan of the metal enclosure and maintain its aesthetic appeal. Moreover, the use of steel coils in the production of metal enclosures allows for customization and flexibility. The coils can be easily manipulated to create complex shapes or designs, enabling manufacturers to cater to specific customer requirements. This adaptability makes steel coils a preferred choice in industries such as automotive, electronics, and construction, where metal enclosures are widely used. In summary, steel coils play a crucial role in the production of metal enclosures by providing a strong and versatile raw material. These coils are transformed into the desired shape and size, ensuring the durability and functionality of the enclosures. With their customizable nature and protective coatings, steel coils offer a cost-effective solution for manufacturing high-quality metal enclosures.

Q: How is steel sustainable as a building material?How is wood sustainable as a building material?: In okorder /.. Properly managed then wood is a fully sustainable and green building material and from an environmental perspective is better than steel. However, it doesn’t possess the compressive strength that steel possesses and it can’t easily be worked or formed into structural components like steel can.

Q: Consider a steel rod of diameter 4.5 mm and length 3.3 m. If a compressive force of 4900 N is applied to each end, what is the change in the length of the rod?: You need to calculate the stress on the rod and compare this with the mechanical properties of the steel. It would help if you were given more info. You will need to know something about the steel such as the yeild stress and E, the modulus of elasticity. The value of E is about the same for a wide range of steels. So long as the applied stress is below the yield stress, the strain is all elastic and is calculated from E. The real answer is that you can not answer this question since you do not know what the temperature is. Given the applied load, the change in length will be much different at room temperature than at 1500C.

Q: What are the different methods of heat treatment for steel coils?: There are several different methods of heat treatment for steel coils, each with its own benefits and applications. 1. Annealing: This method involves heating the steel coils to a high temperature and then slowly cooling them, usually in a controlled atmosphere. Annealing helps to relieve internal stresses, improve ductility, and refine the grain structure of the steel, making it softer and more machinable. 2. Normalizing: Normalizing is similar to annealing, but the cooling process is typically faster. This treatment is often used to refine the grain structure and achieve a more uniform hardness throughout the steel coils. It also helps to remove any residual stresses and improve the mechanical properties of the material. 3. Quenching and tempering: In this two-step heat treatment process, the steel coils are first heated to a high temperature and then rapidly cooled by immersion in a quenching medium, such as oil or water. This causes the formation of a hard, brittle phase called martensite. To improve the toughness and reduce the brittleness, the coils are then reheated to a lower temperature and held there for a specific period of time. This process, known as tempering, helps to reduce the internal stresses and increase the ductility and toughness of the steel. 4. Case hardening: Case hardening is a heat treatment method used to increase the surface hardness of the steel coils while maintaining a relatively soft and ductile core. The process involves heating the coils in the presence of a carbon-rich atmosphere, allowing carbon to diffuse into the surface layer of the steel. This creates a hard outer layer, known as the case, while preserving the desired mechanical properties in the core. 5. Stress relieving: Stress relieving is performed by heating the steel coils to a specific temperature and holding them there for a sufficient period of time. This process helps to reduce residual stresses that may have been introduced during previous manufacturing or heat treatment processes. Stress relieving can improve dimensional stability, reduce the risk of distortion or cracking, and enhance the overall performance of the steel coils. Overall, the choice of heat treatment method for steel coils depends on the desired properties, intended application, and specific requirements of the end product. Each method has its own advantages and can be tailored to achieve the desired balance between hardness, toughness, ductility, and other mechanical properties.

Q: What is future prospect of these steel structures, are they really weather proof like everyone believes??: Which steel buildings are you asking about? The Empire States Building has a steel frame and is completely weatherproof. Most industrial factories have steel frames and are weatherproof. It is the cladding that makes them weatherproof. By the way there is a difference between weatherproof and waterproof.

Q: How are steel coils inspected for defects after recoiling?: Steel coils are inspected for defects after recoiling by conducting visual inspections, using non-destructive testing methods such as ultrasonic testing or magnetic particle inspection, and conducting measurements to check for dimensional accuracy and straightness.

Q: Where can a find a steel scrubber. Its great to clean cooking vessels. Would be great if someone gives me an idea. I did not find it at CVS, but was in a hurry, will try again tomorrow.: I posted this earlier to a similar question... Really burnt on gunk in the bottom like milk or blackened food can easily be cleaned out of stainless steel pots and pans by sprinkling baking soda in the bottom, covering with vinegar, let simmer with a little water for 5 min. Let cool, scrub out with a vinyl scrubby. or I use a lot of stainless steel for cooking and over the years have found a very inexpensive solution to cleaning them especially the ones with burnt food stuck at the bottom. I use Used fabric softner sheets (sheets that i have already used in the dryer for my clothes) and have them soak in water in the dirty pan overnight. Next morning i use the same sheet as scrubber to clean the pan and all the burnt food comes off easily leaving a new look to the pan. Try it this works.

Q: every time i look for steel over the internet like to build cars motorcycles ect i only get steel pipes where can i get steel sheets: This okorder /... Most towns have a steel supply house/ business, check your yellow pages. Also check with local welding and machine shops. They can give you ideas and or their suppliers. They often have bits and pieces that you might buy, instead of ordering a full sheet of material. Wingman

Q: How are steel coils used in the production of consumer goods?: Steel coils are used in the production of consumer goods as they are processed and shaped into various components, such as sheets, tubes, and wires. These components are then utilized in manufacturing a wide range of products, including automobiles, appliances, furniture, and construction materials. The high strength and durability of steel make it an ideal material for consumer goods, ensuring their longevity and performance.

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?: The tensile strength of mild steel is about 70kpsi. Pure titanium is 60-110kpsi, and with 7% manganese it is 130-170kpsi. 1kpsi = one thousand pounds per square inch. So in other words, high grade titanium can be somewhat stronger than mild steel.

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