Q:How are steel coils used in the manufacturing of doors and windows?

Steel coils are used in the manufacturing of doors and windows as they provide a strong and durable material for constructing the frames and components. The coils are first processed and cut into the desired shape, then formed and welded together to create the frames. This ensures stability and support, allowing the doors and windows to withstand various weather conditions and provide long-lasting performance.

Q:How are steel coils used in the manufacturing of exhaust systems?

Steel coils are used in the manufacturing of exhaust systems as they provide the necessary raw material for forming various components such as pipes, mufflers, and brackets. The coils are typically processed through cutting, bending, welding, and shaping techniques to create the specific parts required for the exhaust system.

Q:How are steel coils inspected for surface finish after processing?

Steel coils are inspected for surface finish after processing through various methods such as visual inspection, surface roughness measurement, and non-destructive testing techniques like magnetic particle inspection or eddy current testing. These inspections help ensure that the steel coils meet the required surface finish standards and are free from any defects or imperfections.

Q:Can anyone tell me what that means. I have seen it on knife blades an such. I am assuming it's a formula for the strength of the metal. who does that scale work, and please keep it simple.

The number just indicates which class of steel alloy it belongs. Yours happens to be a 400 series and happens to have no Nickel in it (440 Steel) and a higher amount of carbon (Nickel is very common in steel) When I say alloy, I'm referring to the different chemical formulas and processing of steel which vary for different uses like industrial use, medical use or decorative use. Think of the different alloys like the types of soft drinks out there. Coke, Pepsi and Dr. Pepper. They all have very similar chemical formulas; yet differ with their secret ingredients which is apparent in the taste.

Q:How are steel coils tested for strength and durability?

Steel coils are tested for strength and durability through various methods such as tensile testing, impact testing, and fatigue testing. Tensile testing involves subjecting the steel coil to tension until it breaks, measuring the maximum force it can withstand. Impact testing involves striking the coil with a heavy object to assess its ability to resist sudden shocks. Fatigue testing involves subjecting the coil to repeated load cycles to determine its resistance to long-term stress. These tests help ensure that steel coils meet the required strength and durability standards.

Q:Can steel coils be coated with anti-counterfeit materials?

Yes, steel coils can be coated with anti-counterfeit materials. These materials can include specialized coatings, holograms, unique serial numbers, or other security features that help prevent counterfeiting and ensure the authenticity of the steel coils.

Q:Can steel coils be coated with magnetically attractive materials?

Yes, steel coils can be coated with magnetically attractive materials.

Q:Which one has more electrical resistivity? Wood or steel? And why?I know that the resistivity depends on the material of the conductor, but i want a perfect explaination please.Thnx in advance :)

Wood, and it depends on the elements making up the 'conductor' .. and how 'mobile' electrons are in the material .. To a first approximation (non-exotic materials), if the elements form molecules where electrons are 'weakly bound', then that material will conduct electricity. The 'weaker' the binding (and the more electrons), the better the conductor .. (it is, of course, much more complicated than that .. see link)

Q:My teacher says if they were that they would still be standing today. I'm not sure if he means the reinforced steel in the concrete beams, columns etc or if the whole beams and columns floor etc were were made of reinforced steel.

Reinforced Steel is found in concrete, and if the towers were built with reinforced concrete (concrete beams with rebar) then they would likely still be standing. The twin towers were made of steel. When steel is heated up, it deforms and collapses, which is why it didnt stand up. One of the top 2 things against steel is that it is not fire resistant.

Q:I've been looking for lots of info on this steel. Cold Steel uses it now in their knives replacing the AUS-8 steel. I was hoping somebody had a knife with this steel who could give me some real first hand knowledge not just numbers. Thanks!

Before I answer I must let you know that I have been a knife collector for 17 years, and have a great assortment of specialty and antique folding knives. As for your question, I wouldn't worry too much about it. The first answerer is very knowledgeable in this category. But in the real world, the steel chemistry of folding knives will never be as important as that of fixed blades or kitchen knives. The fact that manufacturures go through great lengths to advertise their superior steel is just for sales and bragging rights. When it comes down to it, a pocketknife might be useful, but it is never the best tool for the job. It is a compomised design from the beginning. If you need to cut a steak, a steak knife will do. A box cutter works best on cardboard. A razor works best for shaving, wire cutters best for cutting wire, an axe for chopping wood...I could go on. A pocket knife is never going to perform better than the real thing ( although I do prefer the can openers on Swiss army knives than real can openers). As for self defense, minus the concealability factor, a folding knife sucks compared to a fixed blade. But if you were to pull one out during an extreme circumstance, I doubt anyone is going to be effected by the Rockwell hardness.