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Copper pots....tin or stainless steel lined?
- Stainless is a fairly poor conductor but that is not why it has hot spots. That's because they tend to be thin. Cast Iron is also a poor conductor and has about the most even heat distribution. Many Copper bottom pots are just Copper plated for looks. In fact only the most expensive will have the heavy Copper bottom needed for even heat. Tin is a metal, an element. Stainless Steel is a mixture ( alloy ) of Iron and Chromium or Nickel or both. I do not know of any cookware that is Tin plated on the inside. I like Aluminium clad Stainless Steel. Good heavy bottom for even heat and Al. is a good conductor. A little more expensive are three layer bottoms. They have the Al. between Stainless so you get the looks and easy cleaning os SS with the heat distribution of Al.s
i know stainless steel don't rust, does that go the same for just regular steel..?
- There are dozens of types of steels, some stainless and some not. They differ a lot in their chemical composition and in how they're made (especially heat treating methods). They all vary in their strength, working properties and corrosion resistance. Regular steel (technically carbon steel--mostly iron, with a little bit of carbon) rusts quite badly if unprotected and in the right environmental conditions i.e. humidity/moisture. The iron in regular steel reacts with oxygen to form iron oxide--the orange/red stuff we call rust. Iron oxide is a loose and porous material which provides no protection to the underlying steel, which is why rusted regular steel will continue to rust. Stainless steel, in addition to containing iron and carbon, contains chromium as a component--and it's the chromium that is important for corrosion protection. To be fair, even stainless steel rusts but what happens is that it's the chromium that reacts with oxygen to create a microscopically-thin layer of chromium oxide. This layer is very tough and actually protects the uncorroded steel, preventing further corrosion. Broadly speaking, the higher the chromium content, the more corrosion resistant the stainless steel.s
why use steel-reinforced concrete?
- Exposed steel requires constant maintenance including inspection and repainting. Steel does not provide a durable driving surface nor a good friction one for stopping unless it is textured, which makes driving on it very noisy. It is not possible to refinish a steel surface as is a concrete surface which can be ground and had several inches of new wear surface in concrete or asphalt added to it. Concrete is much less expensive than steel and the enclosure of steel inside the concrete protects it like a paint job does. Steel is weakened by heat, as was shown by the 9/11 collapses when the applied fire insulation was blasted off the trusses by the crashes, so a burning truck on or under a bridge may damage concrete but leave it standing strong enough to continue handling traffic during repairs, as at overpasses here in Texas where oil tankers crashed and burned.s
- 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.s
Which gun to use for steel challenge?
- I'd rather have the rifle myself.s
Help! I did something to my stainless steel ring?
- You oxidized it. There is nothing you can do to recuperate the oxidized metal. The best you can do is to polish off the rust with a commercial metal polish paste.s
Trade in value for (scrap) steel?
- Scrap steel is usually traded per ton. Average steel prices fluctuate on a daily basis. General prices for scrap steel are around $100 - $200 per ton. For daily scrap steel prices check the source belows
what is the diiferent in composition between mild steel and cast iron?
- Actually, the opposite is true. CAST IRON is generally brittle, while mild steel is not. Cast iron has a carbon content from about 2%-4%. Mild steel has less than one tenth as much carbon as cast iron- around 0.2% - 0.3%. Cast iron also typically has from 1%-3% silicon. Most mild steel contains no more than 0.3% silicon. Steel melts at ~1450 degrees C. The addition of large amounts of carbon and silicon to C.I. lower the melting point to around 1200 C and make it more fluid than molten steel. Obviously this makes it easier to melt and to pour. The main advantage of cast iron is it's cheap to produce. It also has some desirable properties despite it's brittleness. For example it's easy to cut and carve with machine tools. It's also very heat resistant and excellent at absorbing vibration. For this reason C.I. was commonly used for engine blocks and exhaust manifolds in cars and trucks in the past, (Cast aluminum engine blocks are more common these days because Al is much lighter and conducts heat better.) Cast iron also rusts much more slowly than steel which is why it's still commonly used for pipes. C.I. pipes have been known to last 300 years.s
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