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.

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2
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1answer
79 views

Is it necessary to consider temperature effect on waling?

Many text book literature on braced excavation mention the necessity to consider additional load due to temperature effect on struts. But nothing is mentioned about waling. Why is this so? Wouldn't ...
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0answers
428 views

Cement-Filled 6" PVC Bollard [closed]

My next door neighbor's car backed into my wooden fence and knocked down a section. I want to protect the fence from a future accident. A steel pipe filled with concrete would cost more than PVC. A ...
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0answers
210 views

How to calculate monosymmetry index of an unequal angle? [closed]

I saw some formula involving integration. Is there a straightforward formula to calculate this instead given b, d, t and alpha angle between x-x and u-u axis?
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3answers
112 views

Is there a specific name for diagonally braced truss members like those on the Queensboro Bridge?

I am wondering about this specific type of truss in particular, any links to further source information and images regarding this particular geometry would be much appreciated.
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2answers
2k views

How to do section classification for a plate or flat bar?

When doing section classification to calculate buckling of a plate subjected to some bending and compression on its edges, do we consider the plate width as outstand of flanges "c"? What are the ...
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0answers
197 views

Designing a pin connection

I am designing a pipe strut connected to a UB waler using a 100mm diameter pin through a series of 8 interlocking plates. Each plate is about 40mm thick. To be able to weld the plates to the waler and ...
3
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3answers
101 views

choice of steel plate for simple application

I am an occasional hobbyist "DIYer" (not an engineer) who needs help choosing a steel plate for a small home improvement project: I will use it to create a 20" circle, suspended from a bolt at the ...
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1answer
905 views

Steel plate thickness for load [closed]

There is a steel plate with length of 26.5cm (10.4 inch) and width of 4cm (1.57 inch). the steel plate is attached on one end, at the other end there is a load of 30kg, what thickness should be the ...
2
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2answers
229 views

Assessment of a concrete beam being strengthened by an additional steel member

Hi there (from Europe), I am completing what should be a relatively quick assessment for the client, but I have started to second guess my self and would like some reassurance. Essentially the job ...
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2answers
699 views

Steel Continuous Beam Structural Diagram

Here's an image of my structural plan that my group and I are designing for a university assignment. It is a 7-story steel structure with bracing at the two ends and at the verticle core near the ...
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2answers
895 views

Is hardened steel better than tough steel? [closed]

During the heat treatment process, people use clay to harden the steel in certain areas like the spine. Then they have to go through another process to make the steel tough. I need very hard steel and ...
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1answer
104 views

Number of layers in a laminated steel transplant, using Young's Modulus

I'm not sure if my calculations are correct for the above question. $$ E = \frac{\sigma}{\epsilon} = \frac{\frac{My}{I}}{\frac{\delta}{L}} = k. \frac{1}{I} $$ Where k is constant for both beams, ...
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0answers
57 views

What is the theoretical grain size in a ideal phase diagram of a metal?

We suppose thermodynamic equilibrium in a phase diagram, where cooling rates are infinitely long and diffusion in both phases can finish completely. So when we cross the solidus line and we are left ...
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2answers
6k views

What thickness of aluminium sheet do I need to achieve the same strength of a 1/8" steel sheet?

I want to use a boat with an aluminium hull. The authorities wants me to prove by calculation that the hull strength (longitudinal, lateral and local strength) equals at least the strength that would ...
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2answers
725 views

Are British Universal Beams and Columns cut according to imperial or SI measurements?

In product catalogues, beams like UB 152x89x16 have dimensions written in mm to the nearest one decimal place. Are these beams cut and measured using an SI ruler or an imperial ruler. I am asking this ...
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1answer
4k views

How to calculate effective section modulus of a slender section?

Hi how to calculate the effective section modulus of a class 4 section using Eurocode 1993? Can someone show me an example? I tried searching online but cannot find anything useful. My main problem is ...
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1answer
48 views

Knife makeing, choose the steel [closed]

I want to make a knife, but I'm not shure what kind of steel should I use? I want to form it through blacksmithing, and normalize it later. Any suggestion?
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2answers
8k views

Steel Structure connection pin or fixed

For the connection above, I think that once the beam is loaded, their is no room for rotation of the beam. But as per British Standard this is a pinned connection. So I have been trying to determine ...
7
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2answers
164 views

How to optimise feed-forward control of a process based on a prediction using the prediction confidence?

I'm looking for a control method for a production process with the following characteristics: 1 control variable many process parameters (+-50) 1 resulting variable continuous measurement of ...
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2answers
79 views

Folded/bent sheet steel design

I'm coming from the software engineering world (please don't rip me to shreds here), and I'm somewhat unfamiliar with the manufacturing process when it comes to cut and bend steel. To provide broader ...
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2answers
5k views

How to calculate tensile strength of braided steel wire?

I am working on project involving designing a recoil spring coil of diameter 10.2 mm and wire diameter 1.25 mm. I tried using a solid core wire but it failed due inadequate tensile strength. ...
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2answers
679 views

Maximum deflection of a beam, fixed in one end and concetrated load at free end [closed]

A 2 m long beam fixed in one side with a 2000 kg concentrated load at free end. Profile of the beam is HEB100 material S235. I would like to know if the beam will break under this load. If ...
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4answers
2k views

How does a constant load affect the elongation of a steel cable?

I am sorry if this question has been asked before or if the answer is obvious, but I cannot seem to find the answer. A lot of the structural engineering problems we do involve calculating the ...
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1answer
9k views

Steel vs Bamboo strength types/ weight and in various directions & orientations? Specific, Tensile, Compressive, Shear, Lateral etc?

Why bamboo is the ‘green steel’ of 21st-century Asian architecture Bamboo fibre is stronger and cheaper than steel, says Dirk Hebel Carbon Fiber Vs Steel Vs Aluminum Vs Bamboo Pros and Cons Is bamboo ...
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2answers
538 views

How do I fabricate a sphere? [closed]

I'm want to make a 2 meters wide sphere that should be circular enough as a giant hamster ball! I could make it of some sort of strong plastic or steel. It should have a hatch on top that can be ...
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1answer
224 views

How can I drill a long, narrow hole into the end of a steel circular bar?

I'd like to drill several very small (~0.015") but relatively long (~1") holes into a bar of stainless steel, as shown in the diagram below. I did a quick check on McMaster and all the drilling ...
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3answers
4k views

Why would a bearing plate that further concentrates load onto small surface be used?

Here's a photo of a bearing plate where a bridge reinforced concrete beam meets the earthfill The bridge span is about 20 meters long and consists of two reinforced concrete beams each resting on two ...
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1answer
55 views

What effect does the weight of a wall have on the steel in the reinforced concrete below?

Considering the two options build internal wall on top of 10 cm deep concrete slab reinforced with 7.7 mm smooth steel wire mesh build internal wall on top of 30 cm deep concrete floor ...
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1answer
7k views

Aluminum vs Steel rivets/fasteners in a high vibration environment

What are the relative pros and cons between aluminum and steel fasteners when riveting together sheet aluminum (50XX or 60XX) when high amounts of vibration are anticipated? Assuming that the usual ...
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2answers
845 views

AISC Section Modulus numbers

Why does the AISC handbook only list one figure for Section Modulus for shapes such as Angle(L) steel? Shouldn't there be two? The steel is asymmetric. Is the figure given just the Delta to the ...
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5answers
3k views

How can I cut a thin (1mm) sheet of stainless steel with high precision?

I have a circular puck of stainless steel that is 9.5 mm in diameter. In the center, there is already a 5 um pinhole. My objective is to basically cut the steel along the dotted line, approximately ...
11
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7answers
15k views

Why do we use multiple reinforcing bars instead of one bar with a big diameter in reinforced concrete?

Why do we use multiple reinforcing bars instead of one with a big diameter in reinforced concrete? Does increasing the number of reinforcing bars means that the reinforced concrete will have a higher ...
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1answer
362 views

Difference between VC-130 and VC-131 steel

I am a draftsman. I make project of mechanical pieces and machinery. Some pieces works like knifes or sleeve, so to reduce the friction we design the ideal material to manufacture this pieces. The ...
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0answers
931 views

How is the area moment of inertia calculated for angle iron?

The formula for the area moment of inertia for a rectangular cross-section is b * h^3 / 12. But it looks like when computing the value for angle-iron in this table: http://www.engineersedge.com/...
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2answers
83 views

Should P-Δ effect be considered for struts of a braced excavation?

Building codes such as BS5950 provide clear guidelines on how to consider P-Δ effect due to sway of a vertically loaded portal frame or single storey building, causing additional moment in the columns....
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3answers
737 views

What do you call the steel property that reduces the likelihood of shattering?

What is the property of not shattering, in for example a brisant explosion, called? And what kind of steel would I want that has this property?
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7answers
1k views

Why do manufacturers still make aluminum kitchen utensils?

I noticed many kitchen utensils or stand mixer attachments are made with injected aluminum. Aluminum (~\$20/kg) is usually more expensive than stainless steel (~\$10/kg) and is not compatible with ...
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1answer
2k views

C15 Equivalent material in IS standard

I am need to match DIN C15 steel with an Indian steel but I don't know the equivalent grade in the Indian standard. For example, DIN C40 steel is known as EN8 under the IS standard; similarly, what is ...
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1answer
756 views

First principle derivation for torsional constant

For torsional constant, analytical formulas are available for some standard steel sections as shown in this wiki page. But what about arbitrary shapes? How can I obtain the formulas for torsional ...
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1answer
4k views

Schaeffler, De Long, and WRC welding diagrams - which steels can be used?

I am working on a simple program that would help welder to count how much ferrite, austenite etc. there is in weld. I am focusing on stainless steel. I have decided to use 3 graphs: Schaeffler, De ...
5
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1answer
157 views

Why is this box girder made of lattice on one side only?

Here's a zoomed piece of this image from Wikipedia That's a close-up of a tower holding a railroad bridge. A and B are two of the four columns in the tower's corners. I assume that they are placed ...
12
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1answer
410 views

Is steel relaxation plastic?

Hooke's Law defines a linear-elastic relationship between stress and strain. $$ \sigma = E\epsilon $$ Steel behaves very much like a linear-elastic material, following Hooke's Law closely. It does, ...
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1answer
2k views

How to do gold plating on Anodized aluminum and stainless steel?

I have done some research and asked in a few forums for gold plating on anodized aluminum and stainless steel but haven't yet found the answer to my questions. What are the chemicals for pre-...
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0answers
148 views

Alternatives to stainless steel staples

I have to mount a glass fibre woven mat onto a stainless steel foil and using staples seems to be the only way to do it. The environment is one where a large variety of solvent vapors will be ...
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2answers
2k views

Use of 410 Stainless Steel for replacement of 420 Stainless Steel

Can we use Grade 410 Stainless Steel for replacement of Grade 420 Stainless Steel? The application is for engineering components which have torsional and fatigue load. The reason for the ...
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4answers
4k views

How thick is it reasonable for the walls of a steel gas pipeline to be?

The TurkStream project site claims the gas pipeline will use pipes made from 39 millimeters of high-quality carbon manganese steel with additional plastic coatings on both sides. Yes, they claim 39 ...
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1answer
478 views

Does weathering steel corrode the same as carbon steel when it doesn't develop a protective patina?

Weathering steel is supposed to form a protective patina when exposed to wetting and drying cycles. This protective patina prevents more corrosion from occurring. This is what differentiates it from ...
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1answer
132 views

How can I get a quick 2B shine on grade 316 stainless steel?

I have a stainless steel (316) 2B finish strip. I tried buffing the material for a shiny surface but it takes lot of time to finish my production. So, I want to know if there is any chemical ...
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2answers
1k views

Arranging members within a truss efficiently

A wide variety of trusses exist for bridges and roofs. There are many different permutations when it comes to arranging the internal truss members. Depending on the direction, a diagonal member may be ...
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6answers
16k views

Steel selection for building a trailer

I'm thinking about building another trailer. I've built lots of smaller trailers in the past, but this time I'd like to build myself a small tandem axle gooseneck rated for 7,500 lbs. I am a ...