Steel Definition and 840 Threads

Hi everyone... I work in a rolling mill that produces train rail tracks. But I'm experiencing some problems. The guards I use keep breaking. So here is the scinario. The rail we make is 40kg per meter. With a total length of around 65m. When it goes thru the mill pressure is applied to it in...

do you think copper based grease on the threads of a hot dipped galvanized pipe would likely noticeably(naked eye, no measuring equipment) speed up corrosion of the galvanized pipe in normal environments such as buried in typical soils, maybe slightly more corrosive locations than urban areas...

Today, I turned on an electric kettle for heating up some water, then I going to did something else. Since the cover of the kettle was lost, it didn't automatically stop when boils, and I forgot to turn off the kettle when boiled, then all the water vaporized at last and the kettle stopped...

Hi, I am facing issues with my program. Listed below. This is form my masters project. Also in what way can I connect the filleted surfaces shown in fig by a weld or just load or stress transfer connection. fini /clear /title,C160T2B70-1L /prep7 et,1,shell181 r,1,2 mp,ex,1,1.85e5...

A lot of scrap steel is recycled to make new steel. But how is this scrap steel refined? Recycled scrap must be a mixture of various types of steel with each type containing different amounts of manganese, vanadium, chromium, etc. How are these other metals separated from the scrap melt so...

Can there be alternative materials for Aquarium fish tank instead of glass? Example : Stainless steel, Aluminium Plastic, Concrete etc If yes, which materials can be evaluated?

The bridge sections in photo are being welded / bolted ? together on site. Is this going to be structurally strong enough for a pedestrian bridge ?

Help I manufacture and install shade sails, typically using sched 40 steel pipe as the posts on the corners. Most pipe information displays the strength from pressure from the inside, but my real world application is to take a pipe, let's say 14' long, dig a 4' x 16" hole, and bury the pipe...

... Shotgun top rib back on to barrels. I’ve sanded it bright, degreased and fluxed with RMA flux. The 50/50 tin/lead solder just won’t run into the joint, no matter how hot I get the steel. Any tips before I spot weld it?

I saw on a web page a video of tiny Agnes Scott College vs Princeton University from 1966 on GE College Bowl.Agnes Scott won (!), but one of the questions that both schools got wrong was asked by the moderator: The speed of sound in air is about 1,100 feet/sec. The speed of sound in steel is...

If I have 1/4"T x 12"W x 60"L a36 steel how much weight will it hold in the center before it deforms?

Homework Statement I have a roll of galvanized iron sheet steel. Its width is 19mm and thickness 0.25mm Density 7850 kg/m^3 Weight of the roll is 75kg I want to find how long would be the roll if its unwound. Homework Equations Density D = M / V Length L = V / A Area A = Width * Thickness The...

Hello everyone, I'm trying to design and build a steel support frame for a freestanding loft of sorts. I'm in the process of building a recording studio with acoustically isolated rooms within a big room. This requires freestanding structures decoupled from everything but the floor. Normally you...

What could prevent the discontinuous yield (upper and lower) points during a tensile test on a low alloy steel A706 grade? Thanks.

Homework Statement The half thin steel plate has a radius of 4 meters and a surface density of (3+r) kg/m^2, where r is the radial distance from the origin. Using calculus, find: A. its area B. its mass C. Its center of mass with respect to the origin shown, D. It's rotational inertia about the...

Homework Statement [/B] (a) What percentage of carbon produces the strongest plain carbon steel? The Attempt at a Solution I've been posed with the above question and it has lead to some confusion. What is meant by 'strongest'. The question seems to leave open to interpretation what the...

I don't understand the difference between cast iron and high carbon steel. They both are an iron-carbon alloy and they both have a high amount of carbon within the iron metal. Both will oxidize at the same rate without a coating to protect the metal. Stainless steel will oxidize, it just takes...

Homework Statement What is the speed of a 5 mm steel ball falling through water at 10 C[/B] Viscosity of water: 1.3059 * 10-3 Pa*s (Various online sources) Homework Equations Laminar flow: Vt = gd2 (ρp - ρm)/18μ Vt = terminal velocity g = gravity (10m/s2) d = diameter of ball ρp =...

I have found sources that state hardness can't be correlated to yield strength, but only to ultimate strength. Other sources state the opposite. Yet other sources claim you can do both with different equations. Can someone direct me to a source that addresses my question, or addresses the...

Hello smart physicists! I'm hoping to run a span of 124" for a pull up bar, with a support in the middle at the 62" point (so 3 supports total). I'm using the Rogue P-5V Pull-Up Bar Brackets (https://www.roguefitness.com/rogue-p-5v-garage-pullup-system). The brackets call for a tube with a...

Homework Statement The 1050kg steel beam below is supported by two ropes. Find tension of rope 1 Find tension of rope 2 Homework Equations fnet = m*a The Attempt at a Solution attatched picture with attempt not sure what on Earth i am doing wrong here. .

I have a question about the nature of steel. As I understand it to measure the bending strength of a rod of steel there is the yield strength and the tensile strength. On a plotted line for the elastic modulus there is the elastic part to start. Anywhere on this part of the graph a load can be...

<< Mentor Note -- thread moved from the technical forums, so no Homework Template is shown >> The situation is as follows: Current I flows along the axis of the copper pipe. From Ampere's law, the magnetic field inside the pipe is zero and is equal to μ0*I/(2π*r) outside the pipe. Now, an...

Hi, I’m looking for some advice on materials. In the picture A, B and C are stainless steel. Pressure is applied at B rotating D in the socket and raising A. D needs to be as strong as possible to resist the load but I’m concerned about D rubbing against C as there is no lubrication. I can't...

Homework Statement Can someone tell me if i have done this correct please? A steel bar of length 0.6m and diameter 70mm is suspended from a chain and lowered into a tank of liquid whose relative density is 0.9. Determine the tension in the chain when the bar is fully immersed. The density of...

When drilling a thick peace of steel I noticed the drill bit would cut through much faster when it was cool. The difference was minutes versus seconds! Is this a known phenomena in machining or was my drill bit simply contaminated with something or maybe other factors played a role? I've heard...

The picture below shows an image of a bed from a 3d printer, which I intend to equip with an array of 15 x 3 mm Neodym magnets to hold down a steel plate. The steel plate itself is not and can not be equipped with magnets. Theres a heated aluminium bed between magnets and steel plate and the...

Homework Statement I want to check steel weight with formula, and I find it via google. Homework Equations Here is it: https://machinemfg.com/steel-weight-calculation-formula/ The Attempt at a Solution Hope you guys to help me check does above formula is correct. Many thanks in advance.

Hello.. (see 3 colored pictures below to illustrate the question) I have a pair of eyeglasses with screwless spring hinges that uses spring steel metal strip (see full pictures below). I’d like to understand something about it. When the temples are fully opened.. the spring metal strip are in...

Hello Everyone, I was learning about prestressed concrete and how it works. Concrete is very strong under compression but weak under tension. In the case of prestressed concrete, the steel bars are pulled and become elongated. How much do the steel bars elongate when they are pulled? The...

Say you were on a steel ship, standing on very thick steel. Would you technically weigh more? Would the gravity pull you down more?

Hi! So when this system gets heated, how does the wire expand if it is bent like that? Would it expand horizontally or vertically? Also, when calculating the stress for the wire, I know that I use the thermal expansion equation for dL of steel, but other people said that you have to also...

Homework Statement Calculate stress, strain, ∆l, factor of safety Diameter=10cm Length=10m Load=600N E=2256Gpa Elastic limit=518Mpa Homework EquationsThe Attempt at a Solution Area=.7854x(.10^2) Stress=load/area , 600N/.007854m^2 = 76.4Kpa E = stress/strain , 2256x10^9Pa =...

Thanks for reading, hopefully I am posting my first question in the correct area of the forum! I will list as many details as I have in hopes that someone will know how to calculate the amount of sag I will have and tension/force there will be. I am suspending a 1/8 steel cable horizontally...

Hello! Imagine you drop a steel ball of weight x from a variable height y. the ball hits a steel ramp on the ground which is at 45 degree's I would like to know how I could work out how far away the ball will land. I have had a good look around for this however the closest thing I can find...

Homework Statement Hello there, I thought a fully analog , cutting vibrational shapes on steel plate and hit to each shape by fingers and produce whichever sine , square , triangle vibration you want and filter of those collections of vibrations by another steel cut shape and make a synthesizer...

Hello all. Me and some friends are building a coil cannon, and we've been doing some calculations [I know its unecessary but... well, we're physicists! (well, physics students...)]. But we got stuck. How to calculate the force acting on a steel bar (or some other ferromagnetic material, maybe...

Hello, Nice easy question for you all today: I would like to know how the speed of sound in steel varies with temperature. A google search didnt reveal a great deal, so if a physicist could confirm the relationship, that would be much appreciated. I know that: v = √shear modulus/density...

Hello, I work in a apparel manufacturing warehouse and I'm planning to upgrade the Jacket Hanger Racks to a rotatable conveyor. So I want to insert new Steel Pipes for hanging the Jackets which will rotate. So, the length of the pipe is 370 cms / 12' 2", and the weight it will be holding is...

Hey everyone ! I am trying to learn how to mathematically prove that a steel tube (with wall thickness of ~ 1mm and external diameter of ~ 15 mm) will have ... At any point along its length, the shaft must : 1) bend in such a way that the deflection is the same regardless of how the shaft is...

Steel has a "Poisson ratio" μ of 0.29 (in my book of problems at least). Am I understanding the meaning of this ratio correctly: if a steel cylinder is stretched along its symmetry axis by a factor p (something like 1.01 or 0.99) then the radius will change by a factor 1-μ(p-1)? [So then the...

Reposted to help a guy out... Specifications for elephant-resistant steel poles http://www.skepticforum.com/viewtopic.php?p=584279#p584279by Williamhdc » Tue Jun 20, 2017 5:17 am This is probably simple for an engineer, but I’m a zoologist and analytical chemist and so I would rather ask those...

Homework Statement Solve for support reactions of a rigid, rectangular steel frame sitting on rubber pads at the four corners (See attached), when a shear force and a moment is applied at some point on the frame. All the known variables are shown in black while the unknown are in red. It is a...

Hi, I have a question about steel, for instance, silicon steel used in magnetic cores. I was wondering about how Iron magnetises: can you align the grains/domains and heat treat it [or anything], so that it responds differently to flux one way then the other direction? For example, say you...

I have a problem to do with my project in college. I'm creating a hanging fire pit, basically made of 3 lengths of square steel bar connected to a plate at the top and on hinges. The 3 legs of the frame move in slots and when in the open position would be at 45 degrees. The actual fire pit is...

Homework Statement Two lengths of steel plate 100mm wide and 15mm thick are riveted together by a single 18mm diameter rivet. If the joint carries a tensile load of 8kN calculate: a) The shear stress in the rivet b) The tensile stress in the perforated plate Homework Equations stress = force...

Not just for carbon fiber vs steel, I went to a seminar and heard that the team was researching how to make the steel sheets used for car making to be 'stronger', so that, a car can be safer using their material. Then, when I asked what does it actually mean when they say their improved steel...

Hi, I am designing a system to cool aluminium through contact cooling. I have a steel die with 9x 20mm diameter cooling chambers. Water is pumped through the chambers which cools the steel die and hopefully the aluminium sitting on top of it. I am looking to find the temperature of the...

Hiya, I'm been calculating stress and deflection in rectangle steel plate, I've been using two methods to see if I get the same results but i get different results. I want to confirm the methods I'm using and if I'm using them correctly. I have attached photos of my calculations, any...

Homework Statement Why is a steel beam shaped in the form of the letter "I" still strong enough to bear a load? 1) Its compression area is located on the top of the I beam. 2) Its tension area is located on the top of the I beam. 3) Its neutral area is located on the top of the I beam. 4) Its...