Q:I was watching a documentary on the samurai vs the European knight. It said that the when Japan was being invaded by the (cant remember) they needed a new weapon. The enemies armor made iron swords useless. While steel swords broke when in combat. So to combat this the Japanese made a hybrid sword. They used a special mold that made the swords back iron while the part that makes contact with the enemy was steel. Also the sword was curved so it increased its armor and cutting power. This revolutionary design made the the sword stronger. The iron back made it not break while the steel edge made it cut through the enemies armor. I want to know how iron is stronger than steel, and how steel can cut better than iron.

Firstly Iron is not stronger than Steel. You must understand that steel is made with iron. Steel is iron with carbon infused into the crystal lattice; thus making it stronger. Iron was used as the backing because it is more ductile and resilient than steel because steel is stronger and more brittle. So on this basis steel is stronger and better to hit the armor first with more cutting power because it wont yield to softer materials, and iron was suited for the backing because it would allow it to bend as pressure is being applied, but without braking.

Q:How are steel coils inspected for defects after rewinding?

Steel coils are inspected for defects after rewinding by using various techniques such as visual inspection, ultrasonic testing, magnetic particle inspection, and eddy current testing. These methods help identify surface irregularities, cracks, or other defects that may have occurred during the rewinding process, ensuring the quality and integrity of the steel coils.

Q:My mother is in a weilding class, and today she accidentally welded Galvanized Steel. She doesn't feel good and she wants to know what the symptoms are for Galvanized Poisoning from breathing in the Fumes. Please help, I am worried for her.

Galvanized Poisoning

Q:How are steel coils used in the manufacturing of automotive fuel tanks?

Steel coils are used in the manufacturing of automotive fuel tanks as they provide strength and durability to the tanks. These coils are formed into the desired shape and welded together to create a sturdy container that can withstand the pressure and impact of the fuel. Additionally, steel coils can be coated to prevent corrosion and ensure the longevity of the fuel tank.

Q:What are the pros with stainless steel? You don't have to oil them as much or you don't have to oil them at all?Is the rifling in the barrel typically stainless steel as well? if so, is this better accuracy or does the rifling last longer then conventional?are they worth the extra money?Thanks for any info you can provide!

stainless steel is a alloyed steel that resist rust and corrosion. show it enough salt (sea spray or sweat) and it will pit Stainless steel goes all the way through ...it's not a coating like nickle-plate. the inside of a stainless barrel is stainless and they hold up just as well as carbon steel barrels. Extra money? Stainless is pretty popular in new production and the price is not that much different than comparable guns in blue. Oil OK... they do hold up better to salt and sweat than bluing...and there is not coating or plating that can wear off. Down side... the reflect light. Some can be a bit to shiny for some situations.

Q:How are steel coils processed before being used in manufacturing?

Before steel coils are used in manufacturing, they undergo a series of processing steps. Initially, the steel coil is uncoiled from a large spool, a process that is typically carried out using a machine known as a decoiler. Once the coil is uncoiled, it is carefully inspected for any defects or damages. Following inspection, the steel coil is subjected to a process called leveling. This involves passing the coil through a set of rollers to eliminate any unevenness or waviness in the steel. By doing so, the leveling process guarantees that the coil has a uniform thickness and a flat surface, which is crucial for subsequent processing. The subsequent step involves thoroughly cleaning the steel coil to eliminate any impurities it may have, such as rust, oil, or dirt. Typically, this is accomplished by running the coil through a cleaning line, where it is treated with chemicals and water sprays. Through this cleaning process, the surface of the coil is thoroughly cleansed of any contaminants that could potentially compromise the quality of the final product. Once the cleaning process is complete, the steel coil may undergo additional processes tailored to the specific requirements of the manufacturing process. For instance, the coil may undergo annealing to enhance its ductility and reduce its hardness. Annealing entails heating the coil to a specific temperature and gradually cooling it. This process serves to alleviate internal stresses and enhance the mechanical properties of the steel. Upon completion of all necessary processing steps, the steel coil is now ready to be utilized in the manufacturing process. It can be further processed into various forms and shapes, such as sheets, plates, or strips, depending on the specific requirements of the manufacturing process. These processed steel coils find application in a wide array of industries, including automotive, construction, appliances, and machinery.

Q:Okay, I have looked all ovcer the net and it says diamonds are stronger, but why? I mean, why is diamonds used for the top equiptment rather than steel?

diamonds are not so much 'stronger' but they are harder than steel. they are harder because of the symmetry of their crystalline structure. Steel can be made harder by helping it's crystalline structure become more symmetrical, but it's not going to have the perfect structure that diamonds do....it's just impossible due to the chemistry of steel. Many industrial drill bits or abrasives use tiny diamonds for the cutting edge, because they are harder and therefore can withstand more abuse before eroding away. coring bedrock is one common application. However, diamonds do have their weaknesses, and by the right person they can be cut along planes with relative ease. diamonds are not malleable or ductile, so making equipment out of them is just not in the cards, not to mention how much money it would cost to do so....and you can't weld diamonds together to make a long piece of diamond, what you get out of the earth is what you get....or they can make diamonds, but still, we can't create diamonds that are multiple feet long!!

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

Steel coils are inspected for surface cleanliness after processing through various methods such as visual inspection, magnetic particle inspection, and fluorescent penetrant inspection. These techniques help identify any surface defects, contaminants, or impurities on the steel coils, ensuring their quality and suitability for further use or shipment.

Q:I know some .50 Cal BMG will do that, but what are some other cartridges ?Also, are all steel plate the same hardness ?

You need to read in depth about steel and the many forms and recipes that can be used as well as the difference of a sabot and a FMJ round. Many factors can change the ability of a given object to resist a projectile. Angle being top of the list. Next time you walk past a Bank look at the BR window, if they have one, and note it is angled down from top to bottom. This adds to the rated strength and deflects most rounds in a direction that may assist in the round not bouncing around and hitting others in vital locations. Modern armor used on tanks includes DU. My former employer has steel that at 1/2 is as resistant to attack as 1 of the competion. There are other tricks like adding ball bearings or metal shaving to steel and cement ot break tools used to drill. They will have an effect on the ability to break a projectile as well. You are just one more looking for a short answer to a very complex issue. Armor piercing rounds have been around for some time. Sabots and DU. A .50 sabot armor piercing round may well penetrate what a standard .50BMG will not. Silk can be effective in stopping a projectile too.....you might need a thick blanket wrap.

Q:What are chemical properties of high speed steel? Physical properties?What is high speed steel used for? One interesting fact about high speed steel?

wikipedia: High speed steel (often abbreviated HSS, sometimes HS) is a material usually used in the manufacture of machine tool bits and other cutters. It is often used in power saw blades and drill bits. It is superior to the older high carbon steel tools used extensively through the 1940s in that it can withstand higher temperatures without losing its temper (hardness). This property allows HSS to cut faster than high carbon steel, hence the name high speed steel. At room temperature, in their generally recommended heat treatment, HSS grades generally display high hardness (above HRC60) and a high abrasion resistance (generally linked to tungsten content often used in HSS) compared to common carbon and tool steels. see reference for more info .