Excellent Mechinical Property Cold Rolled Steel Coil

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Specification

1. Thickness: 0.4-2.0mm

2. Width: 900-1250mm

3. Inner Diameter: 508 & 610mm

4. Weight of Steel Coil: 3-15MT

5. Heat Treatment: Annealed + Smoothed

6. Margin Status: EC & EM

7. Surface Quality: FC & FD

8. Surface Treatment: Oiling

9. Surface Status: Bright


Chemical Components

Grade

Chemical Components

C

Mn

P

S

Alt

St12

≤0.10

≤0.50

≤0.035

≤0.025

≥0.020

St13

≤0.08

≤0.45

≤0.030

≤0.025

≥0.020

St14

≤0.08

≤0.40

≤0.025

≤0.020

≥0.020


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%




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Q:How can a spider's web be stronger than steel?
Most importantly, spider silk is extremely lightweight: a strand of spider silk long enough to circle the Earth would weigh less than 500 grams (18 oz). Spider silk is also especially ductile, able to stretch up to 140% of its length without breaking. It can hold its strength below −40 °C. This gives it a very high toughness (or work to fracture), which equals that of commercial polyaramid (aromatic nylon) filaments, which themselves are benchmarks of modern polymer fiber technology. What this means in regard to what you have heard is that if you compared the tensile strength (type 'tensile strength' on wikipedia if you do not know what it means) of spider silk and a strand of steel at the same thickness, the silk would have a higher tensile strength than many grades of steel, upto that of high grade steel - of which they are about the same.
Q:How can I tell the difference between different knife steels?
So what does all that mean in the real world of knives. 420 has very low carbon by blade standards, as such it is just junk steel. There are three grades of 440, A, B and C. The amount of carbon in A is about half of what C has. (carbon is what makes steel get hard). Iron is very much like a sponge in that it can absorb and hold different alloys. These alloys give the iron different attributes, and they can magnify each other. Like a sponge iron can only hold so much, for Chromium it is around 13%. At that point the steel becomes stainless. The drawback is a loss of strength. As a bladesmith my knives are generally 59 to 60 rch, 420 and 440 at its hardest is 59 but at that it is brittle so most makers draw it down to around 57. In my test a knife made of 420 couldn't make 5 slicing cuts through rope (most couldn't make one). 440 averaged between 5 and 10. Compared to the lowest grade of carbon steel I use (5160) which average between 25 to 30 on the same rope. I have tested many stainless blades and the rule always the same, the more chromium past 13% the weaker the blade and the less edge holding ability.
Q:Probability of steel hardness?
Suppose that the hardness of steel is uniformly distributed, taking on values between 50 and 80 on the Rockwell B scale. That would be... f(x) = 1/(80 - 50), 50 ≤ x ≤ 80 . . . . . 0 elsewhere Consider this following problem.. Compute the probability that the hardness of a randomly selected steel specimen is less than 60. Here, we have... P(x 60) Oh! Know that the mean and the standard deviation of the uniform distribution function are... µ = (a + b)/2 σ = (a - b)²/12 You should get... µ = 65 σ = 75 Now... P(z (60 - 65)/75) = P(z -0.07) Hence, you should get around 0.462. Good luck!
Q:What could the impurities in steel wool be?
Impurities in steel wool would be of the elemental type. I'm sure steel wool is a mixture of different low grade not good for much of anything else materials. There may be excessive impurities such as lead, cobalt, boron, aluminum etc... in the steel wool. There may also be solvent residue on the wool i.e cleaner, lubricant etc.. I'm sure every batch is different - I know the iron level is high thats what makes them rust quickly.
Q:Why is stainless steel rust proof?
Stainless steel is characterized by the presence of chromium. Chromium oxidizes like aluminium does, by passivation, that is, it forms a though oxide layer that sticks to the metal underneath and protects it. On the other hand, iron oxidizes by turning into rust, which is a brittle material that flakes off, exposing the metal under for more oxidation. Now, what happens when you have a metal that is made of both iron and chromium? Any iron on the surface will rust and flake off (at the atomic level, so do not expect to see much rusting) until the surface is a pure chromium layer (again, we are talking about a layer that is a few atoms thick) and that chromium will oxidize but stay put. Then rust then has no way of getting deeper, and the metal will remain clean.
Q:What was the Iron and Steel Corporation of Great Britain created for?
To create iron and steel.
Q:Finding Steel for hobby welding?
They will sell any quantity of metal and even cut it to size - my experience has been that their prices are not wildly out of line for single pieces of full length stock compared to buying singles where you have to buy a minimum. They also may have sizes that ordinary places consider odd. I was looking for 5/8 square 16 gauge and was told it would have to be shipped in from Houston (to Dallas) by my nearest supplier and found it in stock at MetalSM. But check if you get something odd - the 5/8 cost more than 3/4 at both places and MetalSM actually gave me 3/4 but took it back even though I had cut it. Also check the regular steel suppliers in your area as well as retail welders metal supply places.
Q:What is Steel's weakness in Pokemon games?
Steel is weak to fire, fighting, and ground. Electric and water are neutral damage; everything else is resisted - assuming you're fighting a pure steel type.
Q:Steel Fabrication?
Your question covers a VERY broad area. This link should help you out, you will still have numerous other places you can look but this will cover your basics.
Q:Is acrylic plastic good for bath tubs or steel ?
Steel and cast iron are the premium types of tubs. Acrylic will scratch and dull if you don't use proper cleaners. If they are not installed with the proper support, they will flex and tear loose the caulking around the edges.

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