THE COLD ROLLED STEEL COIL

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Cold rolled steel is the based material forgalvanized steel coil and pre-painted galvanized steel coil. It is widely usedin light industry for marking tank, furniture, refrigerators, washers, freezerplate, air conditioner, micro-wave oven, water heater, soot such machine etc.

Mainspecification:                              

 

COLD ROLLED STEEL

Thicknenss

0.10mm-4.00mm

Width        

600mm-2000mm

Sheets  length  

1200-6000mm

Coil inner  diameter  

508-610mm

Surface  treatement

matt finish/bright  finish,oiling/dry, bright anneal/black anneal

Coil  weight    

3-5t


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Q:Starting a steel mill?
Typically, steel mills are worth $20 million to $200 million and are owned by large corporations. Your best bet to own one would be to take over a corporation that already has one. That way you have all the supply lines, customers, experts and other workers already there, too. Stick with investing in going concerns, so you don't need to be an expert in each business to build it up. Get them ready made, learn the details from the people already doing it, then work out ways to improve it. Do not get tempted to borrow even 10c from the scammers who have answered your question. Start saving your real money, reading the financial news, and making small real investments in real stocks.
Q:What grade of steel is best for a permanent magnet ?
This page on spark test tells how to use a grinding wheel to get a rough idea of what you've got. Includes drawings of sparks for magnet steel;
Q:List out the Industrial application of Eutectoid Steel.?
Eutectic steel is used to produce pearlite, bainite, spheroidite and martensite steels. Those steels vary in strength, hardness and ductility. One uses martensite steel for example in razor blade manufacturing. Of course there is no end to the various uses of these steels.
Q:DUCTILE-TO-BRITTLE TRANSITION TEMPERATURE IN STEEL LOW CARBON?
Transition Temperature Of Steel
Q:where is cold formed steel framing used?
It will vary from location to location. A possible way of telling is how the material is joined. If the material is riveted together it is likely cold rolled. If the material is welded then its probably normalized steel (possibly annealed but less likely). Cold rolling increases the yield strength of the material so less of it is needed. However, it also make the material more brittle. Welding creates defects in the region surrounding the weld and these are more likely to grow and cause failure in a cold rolled steel than a normalised or annealed steels. In addition the heat from the welding will change the microstructure that was deliberately introduced by the cold rolling process resulting in a localised drop in yield strength. Normalised and annealed steels are more ductile and tougher than Cold rolled steel but they have a lower yield strength. Because they are tough and ductile they are less sensitive to crakcs and defects so welding won't lead to as big a reduction in strength. Another possible consideration is the environment they are used in. Steels exhibit a transition temperature (actually more like a range) where they go from behaving like a ductile material to a brittle material. A well known example of what this can cause are the Liberty ships in WW2 (Supply vessels from the US to the UK). These were made by welding together sheets of cold rolled steel to form one continuous Hull. Unfortuantely the transiton temperature of the steel taht was sued was around 4 degrees while the Baltic Ocean is about 0 degrees. As a result small cracks would grow and then when the reached a critical size they would tear through the ship at the speed of sound in the metal (1500m/s) and these massive cargo ships would literally snap like twigs. So, if the steel is being used somewhere really cold its unlikely to be Cold rolled too.
Q:fallout 3 before broken steel?
Yes. The Broken Steel add-on goes automatically where ever you are. The thing is, I would like stand around the control room for a little while until the Broken Steel add-on is completely downloaded (Basically pop A LOT of rad-x and radaway). You should see a pop-up message saying that Broken Steel is installed and the level cap is now at 30.
Q:Will my damascus steel knife rust?
From that point of view the strength or edge-holding ability means very little. Specifically, the bushcraft knife is pattern welded steel. True damascus or Wootz steel is something you'll only find in museums and private collections. they stopped making it several hundred years ago. Despite what many people have claimed, Wootz damascus was inferior to modern tool steels in every respect. It was a brittle, dirty material.
Q:what is the similarity beetween ironn and steel?
Steel is an iron alloy which contains between 0.2 percent and 2.0% carbon. Modern steels nearly always contain 0.5% - 1% manganese as well. (though technically the manganese doesn't need to be present for it to be considered steel.) Above 2.1% is usually called cast iron. Cast iron is brittle, but has a lower melting point than steel. Below 0.2% percent carbon is considered commercially pure iron. Pure iron is soft and malleable like copper, but it has low strength. Adding small amounts of carbon increases it's strength dramatically.
Q:Is boron steel harder?
The only thing that affects the hardness of steel is the carbon content. But there are many elements that can make it easier for a steel to achieve its maximum hardness. And Boron is an extremely effective element that increases the hardenability of steel. Adding as little as 0.002% Boron can have a big impact upon quenching of a steel. Boron is usually added when you need the hardness of a heat treated steel part to extend deep below the surface. For example, lets say you had a two identical plain carbon steel parts, but one had boron and the other didnt, and you wanted to heat treat them both After quenching, the surface should be the same on both, and lets say its 55 Rockwell C. In the plain carbon one, the hardness might drop down to 50 at 2mm under the surface, but the boron treated one might not drop to 50 until 4mm under the surface. Now, these numbers were completely made up, and it would depend on the specifics as to what the difference might be.
Q:What kind of drill bit will go threw steel?
I think you mean through being that said, they make special bits for drilling metal that you can pick up at any good hardware store ps if drilling on your car, be sure you don't drill into the gas tank, muffler, etc

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