Cold Rolled Steel/Black Steel Rolled different size

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Brief Introduction
The Cold Rolled Steel  is steel that has been worked below its recrystallization temperature by passing it between a pair of rollers. Recrystallization temperature is the temperature at which grains in the lattice structure of the metal have been rearranged, leaving it free of strain and deformations. The Cold Rolled Steel  is pre-treated before being cold rolled with a process known as pickling, which uses strong acids to remove scale and other impurities. The Cold Rolled Steel  is then passed through rollers to reduce its thickness. Most cold rolling takes place in multiple passes and as the size of the Cold Rolled Steel  is further reduced, its strength and hardness both increase, but its ductility decreases. After cold rolling, heating the metal up in a process known as annealing can restore some of its ductility. The final Cold Rolled Steel  may be manufactured in the form of sheets, strips, bars, or other forms.

1. Thickness: 0.4-2.0mm
2. Width: 900-1250mm
3. Inner Diameter: 508mm
4. Weight of Steel Coil: 3-15MT
5. Heat Treatment: Annealed
6. Margin Status: EC & EM
7. Surface Quality: FB&FC
8. Surface Status: SB & SD
9. Surface Treatment: Oiling

Mechanical Properties
1. Yield Strength: ≤ 320MPa
2. Tensile Strength: ≤ 370MPa
3. Elongation (L=50mm, b=25mm) When:
(1) Nominal Thickness <0.25mm: 30%
(2) Nominal Thickness 0.25mm-<0.40: 32%
(3) Nominal Thickness 0.40-<0.60mm: 34%
(4) Nominal Thickness 0.60-<1.0mm: 36%
(5) Nominal Thickness 1.0-<1.6mm: 37%
(6) Nominal Thickness >1.6mm: 38%

We use Seaworthy Package to make sure Cold Rolled Steel  is well-protected during the long ocean voyage.

1. Base metal for coated and dipped products.
2. Home appliance
3. Precise welding tube
4. Flux cored welding wire
5. Bicycle, battery shell,
6. Automobile fitting, hardware
7. Enameling industry etc.

1. High precision of dimensional tolerance
2. Excellent mechanical property such as the yield strength and tensile strength, etc.
3. Being highly resistant to denting
4. Exhibits useful magnetic properties
5. High quality surface finish and get well prepared for the surface coating
6. Available in a variety of sizes and shapes with characteristics useful in a wide range of applications

Chemical Components

GradeChemical Components

Cold Rolled Steel/Black Steel Rolled different size


1. Do you have QC team?     
Yeah, sure, our QC team is very important, they will keep the quality control for our products.for quality inspection every day.

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Q:What steel type Pokémon should I choose?
Skarmory, Steelix, Metagross, or Bastiodon. Personally I would switch Heatran, as I don't feel right using Legendaries.
Q:Why is steel denser than wood?
The atoms in steel are more tightly packed. They have a greater mass in a smaller volume than wood. Basically, if you take 100 g of steel and 100 g of wood, the piece of steel will be smaller (less volume) than wood and therefore more dense. Density = Mass/Volume
Q:Why was molton steel found at ground zero?
I think there are things that you are missing here. First of all I looked up the MSDS sheet for Steel from US Steel. Steel is made of all kinds of different metals to start with and the melting/freezing point for steel is 1750 F not 2800 according to US Steel. In addition in the World Trade Center buildings there were all kinds of other materials that are normally used in construction that were all burning at the same time which would have added to the temperatures. Not only was it steel but it was iron, calcium and other building materials too. NIST provides a maximum gas temperature due to WTC fires of 1,000 °C: In no instance did NIST report that steel in the WTC towers melted due to the fires. The melting point of steel is about 1,500 degrees Celsius (2,800 degrees Fahrenheit). Normal building fires and hydrocarbon (e.g., jet fuel) fires generate temperatures up to about 1,100 degrees Celsius (2,000 degrees Fahrenheit). NIST reported maximum upper layer air temperatures of about 1,000 degrees Celsius (1,800 degrees Fahrenheit) in the WTC towers (for example, see NCSTAR 1, figure 6-36) Okay I don't know if you know who NIST is but that is the National Institute of Standards and Technology and they are some pretty smart people. They did not say that the steel melted due to the fires, but they did say that the temperatures surely did get high enough to to melt the steel. If US Steel says the melting point for steel is 1750 and NIST says that the temperatures were around 1800 F then that is high enough to melt the steel. I think the key is that there were other materials burning too.
Q:strongest steel ever made?
I'm a civil/structural engineer. ASTM A 416 is one of the strongest steels, with a nominal yield stress of 243,000 psi and design ultimate strength of 270,000 psi. This steel is commonly used in pre-stressing and post-tensioning of concrete structures. See the link below to one manufacturer of strands and bars made with this type of steel.
Q:silver soldering stainless steel?
You can buy it on Ebay . The flux cleans the surface so the solder will stick . Check with a welding supply to see if this process will work on stainless.
Q:What is INOX Steel?
Q:Are solid steel or synthetic violin strings better?
It depends on the tone you want. Synthetics are a more artificial, but rich tone. Solid steel strings will have a beautiful and bright tone, but may be a tad bit more difficult to play.
Q:Use for spring steel?
Uses Of Spring Steel
Q:are steel guitar strings ok? :)?
Nylon strings aren't better The very notion of such is absurd. They're different. They sound different and feel different. Different guitars are designed for different types of strings. Nylon string guitars are most commonly associated with classical music (you'll never see a real classical musician play a steel string guitar) Whoever told you that nylon strings are better should be ignored altogether. They're obviously not a good source of information.
Q:what is the elastic limit of steel in Nm^2?
It is the Yield Strenght that you are looking for...that is another word for elastic limit. AND, for steel, it does depend on the variant of steel. Not all types of steel are identical, since steel isn't a pure substance. For Young's modulus (and other stiffness properties), just about all variants have the same values. However, for strength properties like Yield strength and ultimate strength and fatigue strength, it does depend on variant, and is precisely why different recipies exist in AISI standards.

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