Steel Definition and 840 Threads

when i was using Scanning Electron Microscope to investigate fracture surface of a metal sample,the results of composition of it appeared so different to what the composition should be, that sample contains 2% carbon comparing to normally 0.1%. i thought there are 3 ways of doing that...

Hi all, i am new here, There is a person at Bladeforums rubbing oil on an expensive damascus blade knife. He stated that he gets a black substance appearing in the oil. I think that the steel is being broken down at the molecular level. A phd. in molecular physics stated that steel has no...

The steel I-beam in the drawing has a weight of 8.90 kN and is being lifted at a constant velocity. What is the tension in each cable attached to its ends? (picture attached) for this problem do i need to first convert kN to N?...and I am just not sure where to start...

If you had a 2 inch diameter AISI 1020 steel rod that is 10 feet long. Under an applied load, the rod elongates by 0.48 inches. A). How would you compute the axial strain in the bar? and B). How would you compute Poisson's ratio for the material, if the transverse deformation of the rod is...

Hey guys, first time posting here! So hope I'm welcomed. Anyways, I'm stumped on this question my prof assigned. Maybe someone here could give me a hand. " A 1km steel railroad rail is fastened securely at both ends when the temperature is 20 degrees C. With increasing temperature the rail...

I have a question on axial loads. I can get to a certain point but can't quite work out how to used the forumla properly. The question is Given that the maximum compressive stress for steel is 235MN/m2. Using a factor of saftey of 3, determin the maximum axial compressive load that can be...

Here's the problem: "Two steel balls are suspended on (massless) wires so that their centers align. One ball, with mass 2.30 kg, is pulled up and to the side so that it is 0.0110 m above its original position. Then it is released and strikes the other ball in an elastic collision. If the...

A steel rope in a cole mine should lift a load of 3500 kg from an underground level of -500 m. The rope is made from steel wire rod. The allowed stress in the steel rope is 60 N/mm². a) Calculate the necessary section area of the rope and the necessary number of wire rod strands in the steel...

I periodically browse the literature for new products. In the August 2006 issue of Advanced Materials & Process (from ASM International), I found an article on a new high strength steel from Carpenter Technology Corp. (Cartech) Cartech Custom 465 (find it at www.cartech.com) Custom 465...

Hi everyone, I need your help. Currently working on the task. Normally have a power generator of 200kW, 380V I need to heat up the steel pipe by means of resistance, so that I will have inside temperature of the pipe 80C. The function of pipe is to transfer, heat the oil. As a first step of...

Hi guys, I need to find material compatibility to carbon steel AISI 1045 that is available locally. The closest that I can find is the SWRH 42A. All of the chemical composition matches (C, Si, P, S), except for Mn. AISI 1045 has Mn content of 0.60 - 0.90, while SWRCH 42A has Mn content of...

Why Zinc is so commonly use coat metals such as steel? I know that its a good corrosion resistant metal to use but what properties of zinc make it good to use under normal atmospheric conditions? Does it have to do with the oxide layer that it forms around it?

Say is a piece of steel is placed in still water and is corroding. Why will the corrosion rate drop away after time?? Is it because the system reaches some sort of equlibrium??

Hi, I have the following question to complete and i was wondering if anyone can help.. Compare the slenderness ratio and maximum safe axial load that a universal column of section 152 x 152 x 37 can carry if it is made from grade 43 steel to BS5950; 1985 and 6.5m in height when its ends are...

How can I demagnetize a steel shaft. Heat is not an option. The shaft is 0.6 inches diameter and 3 feet long. Note I have seen several devices for sale that seem extremely expensive. Perhaps, if I know what the actual physical process is, then I can just build a device to demagnetize the...

I have some galvanized metal roof panels that I want to get rusty very quickly for cosmetic reasons. How do I go about it getting them to get rusty? They are brand new right now.

How effective is using steel powder in a polymer/ceramic composite matrix? I am wondering this from observing this product called Faststeel which is one of those epoxy putty sticks that claims to be steel-reinforced. I actually think that it will make a material stronger than the matrix...

"If two masses are attached by a steel cable and each mass has a force pulling on it, write an expression for the Tension is the cable as a function of the two masses and the two forces. Assume one of the forces is constant, but the other force changes.

A 56g steel ball is released from rest and falls vertically onto a steel plate. The ball strikes the plate and is in contact with it for .5ms. The ball rebounds elastically, and returns to its original height. The time interval for a round trip is 8.00s. In this situation, the average force...

A 5.97 m long steel beam is accidentally dropped by a construction crane from a height of 6.82 m. The horizontal component of the Earth's magnetic field over the region is 12.2 \mu T. The acceleration of gravity is 9.8 m/s^2. What is the induced emf in the beam just before impact with the Earth...

Help with Heat Conduction Question My question is: These days they reinforce concrete walls with steel bars. Would the steel bars enhance or degrade the insulating value of the concrete wall? Explain? Metal is a good conductor and concrete is a good insulator. My answer so far is that it...

A 600 g steel block rotates on a steel table while attached to a 1.20 m-long hollow tube. Compressed air fed through the tube and ejected from a nozzle on the back of the block exerts a thrust force of 4.30 N perpendicular to the tube. The maximum tension the tube can withstand without breaking...

A 5.60 kg steel ball is dropped onto a copper plate from a height of 10.0 m. If the ball leaves a dent 3.10 mm deep, what is the average force exerted by the plate on the ball during the impact? Ok so if you calculate out the speed of the ball you should get the ball is going 14 m/s when it...

A steel ball rolls down an incline into a loop-the-loop of radius R. What is the minimum speed the ball must have at the top of the loop in order to stay on the track? (the ball has a radius r and starts at a height of h) This is a similar image to the one in my book...

From a materials science perspective, what is the point to folded steel? How does the folding process affect the properties of the metal? The place I see this extensively is in Japanese swords, such as Katanas. They will say "hand folded X times" with X usually being anywhere from 150-750, with...

Thermal Expansion Problem i posted this thread in another forum because i really don't know where this question would apply but here goes i've been working on this problem forever and i don't know what I'm doing wrong! a steel rod undergoes a stretching force of 500 N. Its cross sectional...

A steel tape measure gives the length of a brass rod 102cm when both are at 12 degree C. What would the tape measure read (d) when the temperature increases to 45 degree C? coeff of linear expansion of steel = 1.9 * 10 power -5 coeff of linear expansion of brass = 1.1 * 10 power -5 so this...

Hi I doing a coursework on finding the terminal velocity of a steel ball in a liquid at different temperatures How is my graph suppose to like? My two variables are temperature and terminal velocity (i got my terminal velocity from speed = distance / time) And if possible, if you know it...

Spinning at their respective maximum velocities, approximately how much more energy will an ideal composite flywheel (magnetically levitated in a vaccum) be able to store than an ideal ball bearing steel alloy flywheel of the same size and shape? Thanks.

I am assigned a job to check some materials of steel sheet. Is there anyone here can help me to tell it by just looking? I know hot-rolled has rougher surface than cold, but anthing else? Thank you so mcuh!

Hi, Got to the last question in my mechanics problems list and just can't get it! You have a brass tube with steel bar inside. The brass tube is 400.12mm long; longer than the steel bar which is 400mm long. You have to calculate the stress in both objects when a compression load of...

An interesting site: http://www.tf.uni-kiel.de/matwis/amat/def_en/kap_5/advanced/t5_1_4.html It is amazing how humans have progressed from wood/bone/sinew to stone to metals - to highly technical materials. http://www.key-to-steel.com/Articles/Art106.htm - Part 1...

I am trying to answer a question using the TTT diagram of steel that is given to me in my text. I know how to use the diagram, but the book assumes some prior technical knowledge of steel. It gives the information that the steel samples are 0.3 mm thick hot-rolled strips of 1080 steel, and then...

Maybe this is more of a chemisty question but I have found that stainless steel is not magnetic. I can only reason that this would be if the Fe (iron) inside the steel is actually bonded with the other components of steel thus making the 3d spins useless to become aligned. i did a search and...

Me mate says that that you can make Steal from mixing Carbon atom and Oxygen (Transmution) :eek: Basicly stuffing arround with nuclues. As far as I can remember you can't touch the nuclues as the EM forces are too strong. How wrong is he? We made a bet of $20 :smile:

I have a problem that I'm not sure how to approach. "If the shear stress in steel exceeds about 4.00 x 10^8 N/m^2, the steel ruptures. Determine the shearing force necessary to (a) shear a steel bolt 1.00 cm in diameter and (b) punch a 1.00 cm diameter hole in a steel plate .500 cm thick. I...

A steel sphere sits on top of an aluminum ring. The steel sphere (a (average coefficient of linear expansion) = 1.1*10^-5/C) has a diameter of 4 cm at 0 C. The aluminum ring (a = 2.4*10^-5/C) has an inside diameter of 3.9940 cm at 0 C. Closest to which temperature given will the sphere...

Hello, I just registered to these forums but already visited this place for a while. I have a question that fits this particular subforum (I hope). It is related to another hobby of mine, which is knife collecting/making. Let me give you first some background info on the subject, in order to...

I was wondering exactly how yield and tensile strength increases with increasing levels of strain rate for a typical steel grade? I understand dislocations are generated during straining (work hardening), but what happens at higher strain rates which increases the strength?

Anybody know a site where one can find an overview over different kinds of steel and their specifications, such as that St50-2 is actually the same steel as E295. A "handy" site where this type of info can be found...

A steel plate of 10 cm square or (100 sq cm) is .25cm thick. How much force is need to distort its edges by 0.04 cm. sheer modulus for steel is 80 * 10^9 n/m^2, Plz Help Thanx

How does one work just out of interest? I use it when loading a steel beam to see the strain induced in the web of a chanel section. can't figure out how it would work

A question I have is more a curiosity. We have skyscrapers and tall buildings made of steel, but why is it whenever I go look at some housing projects and developments, those houses are built with wood frames? Right away I think of cost which is probably the most obvious answer, but I am not...

I have a problem that I need to solve that is quite extensive it boils down to this. I have a steel vat that's been plated with zinc and its being used to store sulfuric acid. I have to find corrosion rates, heat transfer and thermal stresses, elastic and plastic deformation problems, hydrogen...

Hey People...um this is a question i got for school...i know what was used to solve it but i can't understand how that method was used and why they did that... it says: A foundry operator finds that it takes 55.3MJ of heat to heat a 286 kg mass of an alloy steel from 22 degrees C to 452...

Hi all, i'm trying to figure out the difference between iron and stainless steel. Other than maybe the appearance, that's all i can say. I can't find any links or any relevant chapters in my textbook. In the back of my mind i think the main difference is the bonding but I'm not sure. Can...

a) what is the diameter of a steel wire 18m long that elongates 9mm when a load of 380kg is hung on its end? b) if the elastic limit is 3.00E8 N/m^2, does permanent deformtion occur? a. \Delta L=FL/YA 9E-3m=\frac{3724N*18m}{20E10N/m^2*A} A=3.724E-5m^2 diameter=6.8859mm b. stress=F/A...

A 14.2m long steel beam is accidentally dropped by a construction crane from a height of 9.53m. The horizontal component of the EArth's magnetic field over the region is 16.4 uT. What is the induced Emf in the beam just before impact with the earth, assuming its long dimension remains in a...

Hi, I need to work out the bending moment of a steel tube, 25mm diameter (3mm thick) 410mm long. im assuming i have to use youngs modulus in some way? what's the correct formula for working out when it will bend? thanks chris

Hi, I need to work out the bending moment of a steel tube, 25mm diameter (3mm thick) 410mm long. im assuming i have to use youngs modulus in some way? what's the correct formula for working out when it will bend? thanks chris