Steel Definition and 802 Threads

Homework Statement Determine the intrinsic first critical speed of a circular steel shaft supported by two bearings E=207GPa How can i determine it I'm very confused about this question , you can see the question at the attachment. Thanks for the help

Homework Statement I carried out an experiment using a extensometer, had a range of values for the elongation and load. I calculated the value from the data and had 11GPa whereas it should be 200GPa. Do you know what could have gone wrong? Thanks a lot.

Homework Statement A 230-l steel drum is completely full of gasoline. What total volume of steel material can be used in making the drum if the gasoline filled drum is to float in fresh water with the whole volume immersed? Homework Equations ρwater=1000 kgm^-3 ρgasoline=680 kgm^-3...

Hi, I found this forum while looking for a formula online and am hoping someone here can help me. I'm having chairs built from sheet steel for a public art display and need to decide the thickness of sheet steel to use. The job shop is suggesting 1/4" steel (either A36 or stainless), but...

Homework Statement Steel has a theoretical strength of 4 x 10^10 Pa a density of 7860 kg/m^3, Youngs Modulus of 2 x 10^11 Pa and the mass number of iron, the main ingredient in steel, is 56. Calculate the bond energy of the steel using the expression for theoretical strength and surface...

Hi A steel plate 2 cm thick is maintained at a temperature of 550 C at one face and 50 C on the other . The thermal conductivity of stainless stress at 300 C is 19.1 W/mK . Compute the heat transferred through the material per unit length ? Answer : - we have q = - k . A ...

hi all; actually i have done an experiment using die sinking EDM using one copper electrode and three different work piece material copper aluminum and stainless steel to perform a comparative study in term of MRR, TWR and surface roughness. i used ( pulse current 8, 12, 16, 20 and 24 Am... the...

Hello, For my setup I'm looking for a method to heat a small stainless steel plate (50x50x10mm(2x2x0.4 inches), AISI 304) to 900ºC (1652ºF). The plate is fixed onto the frame, so it can't be removed. I've found some induction heaters, but they were all too expensive. Anyone got some...

Hello, It's been a while since I did this in college and I cannot remember a few steps. I am trying to calculate the maximum force my designed shaft can handle before bending/shearing. My shaft material is C1018 steel rod, with a yield strength of 53.7 KSI and an ultimate strength of 63.8 KSI...

Read this quote on a major recycler's website: "During this processing, we separate ferrous materials from nonferrous and further separate the copper, aluminum, brass, stainless steel, and other metals from the stream of nonferrous metals. " Is Stainless considered non-ferrous? Why? Isn't it...

Hi, I have a problem which you guys probably could help me solve or at least advise how to approach. I am building a mechanical system that consists of 2 steel rods acting as rails and a platform that travels along. I need to find radius of curvature of a steel rod under stress to see by...

I am working with mild steel 1/16" wall tubing. I am sleeving this over another tube to extend it. The attachment point is 12" past the end of the sleeved tube. How much weight can the extention tube handle before it would bend? Thanks

is there a straight formula for finding one of the natural (preferably fundamental) frequency of a steel flat with dimension say, L=1000 mm, B=100 mm and Thickness T=10 mm ? The flat is fixed at both ends by bolts and two weights of equal magnitude are suspended at 1/4 and 3/4 (i.e. 250 mm and...

This construction practice made me curious. As soon as I lifted the 3/16 inch thick by 2 inch wide steel bars (now routed into the plywood subtop under our granite counter overhang) I noticed that these 12 foot long metal pieces bend considerably under their own weight. It is common practice...

Hello everyone... Would firstly like to say that I'm new to this forum so please forgive me if i posted this in the wrong place. I am currently busy with a marine tank build and need some help as the title says. I have 2mm thick 2"x2" steel square tubing which i am thinking of using for...

Hi all, I am after trying to find the plastic section modulus about both local axes (x & y) after having calculated them for the global axes (n & p). Is there a way I can transform global to local using Morh’s circle to evaluate plastic section properties? Attached is the key diagram I am...

Homework Statement [Math. for Physicists, M. Stone Problem 1.4] Assume that a rod of length L is only slightly bent into the yz plane and lies close to the z axis, show that the elastic energy can be approximated as U[y]= \int_{0}^{L} \frac{1}{2}YI(y'')^2 dz Homework Equations It is...

I have a question about how to calculate what size of steel tubing to use in building a boom for a wrecker. Tentatively the compressed length will be 12, and extended I would like to be 28' as this will be a 3 stage boom. I would like to have a safe working load limit of 5Ton at full extension...

Why Mild Steel has two Yield Points ? :confused:

Hello everyone obviously smarter than I. There is an answer I seek, to a project that is willing to be done. I'm considering manufacturing a piece of fitness strengthening equipment that is somewhat unique. There is some sort of equation I'm missing to have an understanding of how to go about...

Homework Statement a) Find the frequency of vibration under adiabatic conditions of a column of gas confined to a cylindrical tube, closed at one end, with a well-fitting but freely moving piston of mass m. b) A steel ball of diameter 2 cm oscillates vertically in a precision-bore glass...

Hello All, I am in the process of creating a 33' tall chaotic pendulum, and cannot find any calculations for the buckling strength of pipe. The pendulum swings from side to side, but is stopped as it goes too far one way or another by a limiting cable attached to a sleeve over the pendulum...

Hello people, thanks for reading. I am glad you are checking out my problem. Basically I need to confirm a "theory/formula" that my boss had written down from a decade ago declaring how much water (roughly) would be needed to cool Slag from steel making process to below boiling. PROBLEM...

Hello all, thanks for reading. I am trying to figure out how much water (gallons) would be needed to cool 1 ton of molten Carbon Steel from 2200F to 212F. The specific heat of Carbon Steel is 0.49 Kj/kg.C I am not sure where to start. I tried used Newtons Law of Cooling but I don't...

I was wondering if anyone could suggest a material that would stay in a solid state within molten steel/aluminum at least for several seconds. There are also two things: 1) the material should react to a magnetic field applied from the outside 2) material's density should be less than that of...

We have a small lab reactor (~2 Litres) made of stainless steel that we use to test reactions. Unfortunately, we now have one test which has a hot acidic environment (dil. HCl approx. 20%) that would corrode the native stainless steel. Is there any way to work around this? Maybe a...

What is the different between HSLA and tool steel in term of properties, price and application

I need a 5"x2"x1/8" 'cover' to protect some sensors from a drill bit. Occasionally the bit will run into the cover and chip away at material, etc. I need the cover to be dull and black, coating with a surface treatment won't work because over time the coating will chip away. What are my...

Homework Statement An 800 g steel plate has the shape of the isosceles triangle shown in the figure. What are the x and y coordinates of the center of mass? https://www.physicsforums.com/attachment.php?attachmentid=13559&d=1208292919 Homework Equations x=1/M ∫ x dm [b]3. The...

The steel wire can withstand strong tensile stress, but when the steel wire is being coiled into a spring it can be an elastic spring. Why is this? Can this be proven mathematically?

What i want to do is have a cylinder that is made of steel (don't know what types there are but i guess regular) with a height of 20 ft or so, filled with water. for the bottom of the cylinder i want a piston that would move 6 inches. the volume of the water on top of the piston is about...

1. a steel plug has a diameter of 10.0 cm at 30 degrees celsius. at what temperature will the diameter be 9.986 cm? 2. a steel measuring tape is exactly 50,000 m long at 20 degrees celsius . (a) what is the length on hot summer when the temperature is 35 degrees celsius? (b) if such steel tape...

Seems to me in that an antenna is carrying microamps at most that slightly higher resistance of steel Vs copper wouldn't matter. What's the fault of this logic??

Hello, I'm a very curious EPE student (electrical power engineer) who is trying to figure out why there are variable gaps between joints of large steel structures. Because of this gap the stress seems to be distributed with peak force at the intersection of the bottom plate, why is this...

Homework Statement A 275 KG steel mass is held by a long cable to the ceiling. Daniel hits the steel mass horizontally and gives it a horizontal speed of 1.75 m/s. Assuming there is no friction, determine the maximum height gain, in centimetres, of the steel mass after the collision...

I know this is a complicated question, and depends on a lot of factors. So, I will do my best in explaining the situations. I am trying to regulate the temperature of a pool of circulating water. I have 8' of stainless 304, 1" OD, 14 awg, pipe, positioned against the flow of water (to provide...

Homework Statement Homework Equations Trigonometric identities and differentiation The Attempt at a Solution It's pretty simple to solve this question when the hallway is a right angle. Differentiating -6cscθ + 9secθ and setting it equal to zero and solving will yield the proper...

Homework Statement A uniform steel bar swings from a pivot at one end with a period of 1.3 sec. Solve for Length of bar Homework Equations T=2pi*sqrt(L/g)The Attempt at a Solution since the period is 1.3 seconds, I just plug in 1.3 for T and 9.8m/s^2 for g and solve for L i get L= .42m, which...

16. As part of a heat-treating process, an alloy-steel billet, initially at 1032°F, is cooled in a 32°F air stream. The temperature history of the billet is shown in the figure at right. What is the time constant τ for the cooling process? I have attached an image of the question. I...

Hi guys, I'm designing a cooling device as part of a project and need a little help with the maths. OK, so the scenario is this, take boiling water, put it in a stainless steel container with Thermal Conductivity of 8.7 Btu/h ft °F and dimensions of 15.811cm x 15.811cm x 1 cm to store 250ml...

Homework Statement A steel cylinder of diameter 8cm and length 12cm is initially at 600°C. It is placed in oil at 20°C for rapid cooling, for case hardening of the surface layer. The value of h is 60W/m2 K. Use the numerical method. a. Determine the time in which the maximum internal...

Hi, This question came up after some stainless steel samples were exposed to high temperatures (metal flame holders in a combustion chamber). Some of them had areas with rainbow colors. What exactly happens to the steel that causes these local rainbows? If the colors in point A and B on the...

I am trying to estimate the damping ratio of steel in bending. I have a situation where I need to know the dynamic response of an inverted pendulum. A picture is worth a thousand words, so here you go: The vibration will be free; it is caused be the initial position of the system. I can...

A 1.80-m long round steel wire with a cross-sectional diameter of 0.80 mm is placed over a light frictionless pulley, with one end of the wire connected to a 23.0-kg mass and the other end connected to a 14.0-kg mass. By how much does the wire stretch when the masses are in motion? S= F/A e=...

I am using an 8" steel plate as a beam that will undergo moment forces and deflections. I am not sure how to calculate the maximum moment capacity of a plate like this. I think that the deflection would = Fb*L^3/(48*E*I). Does this look correct? I know how to calculate the max moment in the...

what is the best heat treatment for mild steel which will produce hardest result when tested in laboratory

Homework Statement In general, the density of a three dimensional object is expressed as mass per unit volume. However where an object is of uniform thickness its depth can be combined with the density factor allowing the density to be expressed in terms of mass per unit area. A pair of...

What I need is a 1"x.5" rectangular tube .065" wall and 84" long steel tube that will have the least or very low deflection. I have been trying to educate myself today on the different grades of SS which would be preferable for rust resistance. If I understand things correctly 304 SS is the...

Any help is appreciated, I'm really just trying to figure out if it can withstand 300 meters but it would be useful to see how/if a max depth can be calculated. diameter: 20M steel density: 7850 kg/m^3 weight: 250,000 kg shell thickness: 2.54 cm density of water: 1027 kg/m^3 How much...

I am looking for a paragraph on each metal on the comparison of aluminium and stainless steel under the heading: Manufacturing Methods: What processes are available to turn the raw material into products and how do the processing methods differ? Regards, Lockyphysics