Questions tagged [steel]

For questions related to the alloy steel: Its production, material properties and applications. The carbon content of steel is between 0.002% and 2.1% by weight for plain iron-carbon alloys.

Filter by
Sorted by
Tagged with
1
vote
2answers
85 views

Help with designing support structures for instrument

I am an instrumentation engineer and I need your help with designing a support structure for a gas-measuring (precision) instrument. The instrument works in an emitter-detector configuration, and ...
0
votes
2answers
55 views

Can stainless steel be used in continuous high temperature environment (500°C to 850°C)

Can i use stainless steel as a furnace roof. Furnace temperature will be max upto 850°C. If so which ss grade will be the best in this situation. Thanks
0
votes
2answers
72 views

Steel grade recommendation

I'm working on a private project (no commercial motivations here) to build an outdoor (wood fired) pizza oven for my garden. It's basically made of steel, so my question is which steel grade would be ...
0
votes
2answers
70 views

I can't decipher the string printed on my steel pipe (to find the yield stress)

TLDR; Can you please help me understanding the string in the picture and help me finding the yield stress that my metal can handle? Full story I am trying to estimate how much load some zinc-coated ...
10
votes
4answers
1k views

What happens from B to C in this stress strain diagram of mild steel?

Image Source: https://mechtics.com/design/strength-of-material/stress-strain-curve-for-mild-steel-with-defination-of-stress-and-strain/ I know that A is the proportional limit, B is the elastic limit. ...
11
votes
9answers
2k views

Aluminum weight saving

"Aluminum saves weight! Its 3 times lighter than steel!" Also its 3 times weaker and 3 times softer. When comparing stiffness and strenght to weight ratio, aluminum isnt any better than ...
0
votes
2answers
54 views

Wind load distribution on a sawtooth steel roof

I have a steel structure (see picture below) and its roof is a type of sawtooth roof. The plain/flat part is from glass and the inclined surfaces are some kind of pergolas, but I prefer them to be ...
-1
votes
1answer
52 views

How to assess the stiffness of a hollow steel section joint?

Hollow steel sections are used often in trusses: I've been taught that the advantage of a truss structure is that it can be stiff without any of the members being under bending moment. This is an ...
3
votes
3answers
137 views

Is there a maximum life for things made out of stainless steel or cast iron?

Do steel objects have a maximum lifespan? I read that "316 stainless steel is estimated to last for 1200 years in a “rule“ environment before heavy pitting. In the marine environment this is ...
0
votes
1answer
63 views

Why do we have profiles with fraction millimeter dimensions?

We have standard profiles such as this type of tube with outer diameter of 60.3mm, used for example in railing. Why is it 60.3mm rather than exactly 60mm? In what application does the extra 0.3mm make ...
0
votes
1answer
50 views

How to calculate what size steel RHS to use?

I am welding up a rack to support a distributed load of up to 1000kg, what is the process to work out what steel section size I should use? Many Thanks.
0
votes
2answers
61 views

Deflection of 2" steel tubing with braces across 15' unsupported span?

I'm making metal frame to support a wooden deck. The yellow object is the concrete base where there is a 2" trough where my metal frame needs to support a 300-500lbs deck load. The span between ...
0
votes
1answer
74 views

Design of pinned joint to Eurocode

Above picture is from Eurocode 3: design of steel connections. It gives geometrical requirements for a pin ended member. Looking at situation A, we have the minimum distance $c$ from the edge of the ...
0
votes
2answers
43 views

Structural steel standard S235, is it average yield strength or some fractile?

Question is in the title. There are many structural steels like S235 and S355, but are these values average values or 5 % fractiles for example (assuming some distribution of values found in tests), ...
3
votes
2answers
67 views

Why is the yield strength of steel assumed to be less for a thicker element?

The above image is part of table 3.1 of Eurocode steel design standard. Looking for example at the first row (steel grade S 235), we see that there are two values for yield strength $f_y$, one for ...
1
vote
5answers
123 views

Exactly what makes steel-concrete composite beam better than pure steel?

A composite action beam may have a concrete section the top, carrying the compression load, and steel at the bottom, carrying tension. But I have always thought that concrete had lower strength for a ...
0
votes
2answers
164 views

Reasonable expected yield strength of A513 steel

I'm looking to build a fish-tank stand for a decently large fish tank (300 gal). I'm looking at building it out of A513 steel because that is easily available locally. However, I am having trouble ...
0
votes
1answer
29 views

Production methods for AC mains power plug pins?

What are the production processes and steps involved in producing a mains powered device that plugs into a standard mains socket (like a smart plug for example). Mains plug pins are usually made of ...
1
vote
3answers
79 views

Steel frame connection

this is a steel frame , top beams sitting on top of column with steel plate cantilever at both sides (one side longer than the other) , so there will be hogging moment at the center support. However, ...
2
votes
1answer
694 views

Is it possible to determine how the steel was made, having its microstructure (for example, to distinguish forging from rolled products)?

How do you think the steel in these images was made? Example1 (https://i.stack.imgur.com/oZLRM.jpg) Example 2 (https://i.stack.imgur.com/jrDE7.jpg) Example 3 (https://i.stack.imgur.com/fpl2d.jpg) ...
2
votes
1answer
48 views

Tempering 1095 steel

I have some laser-cut filing templates, about the size of a business card, made from 3mm-thick 1095 carbon steel. These parts will be used to guide a round metal file when filing odd shaped holes in ...
1
vote
1answer
92 views

Chamfering with a conical bit makes a table drill vibrate

I have a slow-speed drill press which seems quite solid, the play is minimal. Normally, it does not cause problems. This conical bit: when applied to this 8 mm hole: is an exception: the bit jumps ...
0
votes
0answers
70 views

classes and grades of steel and stainless steel

I'm trying to learn the standard nomenclature for the steel and stainless steel mainly used in the bolts, screws, nuts, and other fasteners in general. So far I have created this table: | Metric ...
0
votes
1answer
48 views

How to build a steel flat bar rotating mechanism using an axle hollow shaft?

I aim to build a system of a steel flat bar rotating around a pivot point with the help of a couple of dc motors mounted on the edges of the bar. After doing some search I decided to build it using a ...
1
vote
1answer
134 views

How to estimate the tensile strength of inch diameter steel round?

The tensile strength for 1045 TGP Precision Steel Round is said to be 91 ksi. Although, different diameters must be a factor, right? Would a 1" diameter rod be 104.5 ksi or 1045 ksi? Say I want ...
18
votes
7answers
5k views

Is it structurally sound to cut an I beam to a T on one end?

I'd like to confirm whether the replaced beam in the attached picture is structurally sound given the end was cut to a T instead of an I. I had a qualified structural engineer approve the work but I'm ...
1
vote
0answers
26 views

Practical estimation of magnetic force

I'm trying to estimate the magnetic force which develops on a truss-like ferromagnetic structure (I want to estimate the motion of the object) in a uniform magnetic field, and I came to realize that I ...
2
votes
1answer
138 views

Calculating Bending Force on a Fixed Metal Plate

At work we've had a steel pipe support break on us, and I can't for the life of me figure out what happened. Here's some background info: A long (125m) steel heating pipe (ø51mm) is suspended, resting ...
0
votes
2answers
173 views

determine if the flow is laminar or turbulent [closed]

what would be the the type of flow if the water flows through stainless steel channel? would it be a laminar flow or turbulent flow. I assume the adhesive force of water to stainless steel is minimum.
1
vote
2answers
3k views

What is the difference between W, S, I, H sections?

W and H sections look pretty much the same. S and I sections have their flanges rounded. What difference does this rounding make, why would an S-section be used instead of W-section for example?
2
votes
1answer
37 views

Galvanic compatibility with mild steel

Let me just get this out of the way: this is a total newbie question. But I appreciate any advice I can get! I'm rebuilding / retrofitting a wood-and-steel trailer, and trying to identify affordable ...
2
votes
1answer
49 views

I have a small piece of stainless steel that I need to remove 1-2mm of material. The hardness is 200. What type of file do I need to get?

This is a part of a mounting system for an Olight pistol flashlight. The universal adapter that they include isn't so universal when it comes to a Canik handgun. I've talked to the people at Olight ...
1
vote
1answer
42 views

steel beam type and size for a clothesline

I have four posts in a square formation. Posts are also square. I want to bolt a beam between two posts on the left and a beam between two posts on the right, and than run some wire between the beams. ...
1
vote
1answer
56 views

What is the purpose of the steel plate in this coupler?

I've found a shaft coupler that has a steel plate in between, but it's not clear what its function is: If it is to add strength to the coupler, isn't the coupler as strong as the weakest link, i.e. ...
-1
votes
1answer
29 views

What are good color coatings for a steel surface?

I need to decide upon a color coating for a steel surface. This will be a grill top accessory and will be in contact with flames. I would prefer a black/brown coating color. I was considering teflon ...
0
votes
2answers
57 views

Soapbox - GoKart material - Bamboo or steel?

I am building a soapbox (go kart) and I am planing on what materials I could use for the frame and the chassis. I have thought about using bamboo or steel. Steel is normally the go to material when ...
1
vote
2answers
23 views

Elongation values for materials

According to EN standards, elongation for each material type has been defined, and it varies with different range of thicknesses for the same material. Why is it so? How is this value calculated?
1
vote
3answers
1k views

Could a bolt this size actually be used on a project?

could there ever be a structure that would require something like this?
1
vote
2answers
547 views

How much weight can this aquarium stand hold?

I purchased this aquarium and stand secondhand, and a few people I’ve spoken to have been suspicious of the stand’s ability to hold the aquarium when filled with water. The tank holds roughly 55 ...
1
vote
2answers
28 views

Electric Arc Furnace Steam Production

How much steam is emitted from an electric arc furnace in a unit of time? I have not been able to find any data on this which is strange considering the amount of water that is used to cool an ...
1
vote
1answer
27 views

Overextending and cutting a coil spring

This is related to my recent question Can I weaken a coil spring consisting of spring steel?. The answer here could create an additional answer there, but I do not expect that. The difference to that ...
8
votes
8answers
5k views

Can I weaken a coil spring consisting of spring steel?

I have a steel coil spring that is used by compression. It is too strong, and I would like to reduce its strength by some fraction, ideally keeping its length. Reducing it to roughly half would be ...
1
vote
1answer
72 views

Simple steel column buckling calc - where am I going wrong? (Eurocode)

I'm trying to follow an example of this, but I get a wildly different answer than expected and I can't see where I'm going wrong. The example I've got, is for a 2.8 m steel column (RHS 150 x 100 x ...
2
votes
4answers
106 views

Which post would be stronger?

Just a quick question for you. Well hopefully. A contractor has installed a retaining wall with colorbond fence on top. In the contract he stipulated that he would use 65mm x 65mm x 1.6mm powder ...
0
votes
2answers
244 views

Orthogonal to Orthoradial reinforcement

Most of finite element calculations are performed with an orthogonal mesh (Cartesian coordinate system). From this calculation, we get two values of required steel area per linear meter: $Ax, Ay$ ($cm^...
2
votes
2answers
702 views

What are the design difference of a steel tank that would withstand 136atm inside and 1atm ambient compared to 1atm inside and 136atm ambient?

Let'say the steel tank would be submerged deep in the ocean with 136 atm ambient pressure then the other tank with the same material would just be used to contain 136 atm pressure. How would the ...
5
votes
2answers
5k views

Calculating shaft diameter

I'm designing a circular shaft that's going to carry a spread radial load of about 200kg and also transmit a 160Nm torque. I'm not very familiar with materials but what I'm guessing I'll be able to ...
0
votes
1answer
50 views

How to size a rectangular steel tube to hold certain weight?

I would like to build a shelf (1m width and 0.5m depth) using only four rectangular steel tubes on for legs. Each legs are at the end of the rectangular tube. I would like to put 500kg on the tubes, ...
0
votes
1answer
67 views

Plate thickness for repair of completely corroded web

The web of a H-section column has been completely corroded at the air-moisture interface with the concrete encasement leaving a hole in the web. The proposal is to break out the existing concrete and ...
0
votes
1answer
316 views

How do I calculate the compressive strength of a wall?

I literally just have a thin steel wall that stands vertically with a load on top. The thin edges of the wall are oriented vertically with the load applied on top of the top thin edge, with the large ...

1
2 3 4 5