# Tag Info

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

While not an ideal situation, it is common enough that this type of cut/reduction of the beam as it comes to its support actually has a name. This is more often referred to as a coped or dapped steel ...
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### Aluminum weight saving

I believe it has less to do with strength and more to do with stiffness. A rod of aluminum of the same length and weight as a a steel rod will be just as strong (force required to break) but have ...
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### Is it structurally sound to cut an I beam to a T on one end?

This is a textbook example of what not to do. We don't get into stress concentration at the cut off of the corner of the beam, or the fact that the two very different stiffnesses of the beams are a ...
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### What happens from B to C in this stress strain diagram of mild steel?

One point of note is that the yield region is not as cleanly defined as BCD is in the image (although most books have it that way). In reality the yield region looks like The following image is one ...
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### How does the strength of a square tube depend on the side size?

Flexural capacity is based on the stress at the extreme fiber (the point farthest vertically from the neutral axis). $$\sigma = \frac{My}{I}$$ Or, rearranging $$M = \sigma \frac{I}{y} = \sigma S$$ ...
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### Aluminum weight saving

TL;DR: Materials perform differently under different loading conditions. Some applications are more suited for steel others for aluminium I will try to give another more general perspective/approach, ...
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### How to strengthen an I beam

If your beam design is governed by yielding in bending (not lateral-torsional buckling/plate buckling, etc) then you need to increase the second moment of area (I) to increase the bending capacity. ...
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### Is it structurally sound to cut an I beam to a T on one end?

If the white beam on the left is adequate, the one on the right is much bigger than it needs to be, so hacking a piece out of it might not matter. In general this idea is a horrible example of ...
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### Can I weaken a coil spring consisting of spring steel?

You could try a bath of concentrated acid. As long as you could maintain circulation so the concentration was fairly constant, a spring presents a very uniform cross-section and should be dissolved at ...

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

TL;DR: Since we can't see how the beam is supported on the other end, its not clear whether its structurally safe. Still, I don't believe this configuration can transfer safely any substantial ...
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### Is there a maximum life for things made out of stainless steel or cast iron?

Strictly speaking, very few metals are "stable" in terms of the laws of thermodynamics. True chemical stability is when the atoms are in their lowest energy state. For most metallic elements,...
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### What thickness of aluminium sheet do I need to achieve the same strength of a 1/8" steel sheet?

Using your plate as boat hull implies a complex load profile probably involving compression, shear and bending, possibly even torsion. In such cases, it is effectively impossible to give a simple ...
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### Aluminum weight saving

Sometimes the strength isn't required, so size for size, aluminium is lighter. e.g. bicycles often use aluminium screws to hold the bottle cage to the frame. The size of the screw is set to be ...
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### Steel Structure connection pin or fixed

Pinned connection in structural context doesn't mean free rotation/zero moment. Pinned connection means much bigger rotations and much lower strength compared to the connected members. According to ...
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### How to calculate tensile strength of braided steel wire?

First off, the tensile strength is a property of the material, not the spring itself. Strength, often denoted as $\sigma = F/A$, can be considered how much force a material can withstand for a given ...
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### Why are steel I-beams mostly symmetrical?

Academically, I believe you are correct in that you could potentially optimize an I-beam to have a higher failure-load to mass ratio. You would have to play with the area moment of inertia equations ...
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### Spring degradation in hand grip trainer

for a properly-designed (right materials, right size, right manufacture) spring of that type, the applied stresses are far too small to cause any plastic deformation (permanent bending) at all. ...
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### Which post would be stronger?

The incorrect posts are weaker as it is the dimension perpendicular to the fence which is critical. It sounds like you have a breach of contract here so you should ask them to replace with the ...
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### What happens from B to C in this stress strain diagram of mild steel?

Point "C" is the "offset yield point" or "proof stress" as described below. The yield strength or yield stress is a material property and is the stress corresponding to ...
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### Can electric furnaces be used for steel production from ore?

It's almost certainly true that an electric arc furnace isn't adequate for steel production, at least not by itself. It depends on what phase of steel making you care about though. An electric arc ...
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### How can the alloying materials of recycled steels be separated?

First the scrap is separated at the source ; for example cast iron generally only contains Si and Mn. High vapor pressure elements boil off or collected in the flux/slag : eg, Zn, Pb, Sn, Bi, An ,,,,...
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### Are British Universal Beams and Columns cut according to imperial or SI measurements?

There is a misnomer in the question in that the beams are not cut to section at all, and not measured with any sort of ruler during manufacture. The sections are rolled on a hot rolling mill where ...
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### Steel : is Damascus steel still relevant compared to modern alloys?

Damascus and Samari blades are artisan made , so have variations. They were a very clever way to make medium carbon steel before the science was understood. They are a combination for wrought iron ( ...
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### What's the difference between tempering and aging?

Although the time and temperatures may be the same, different things are happening. Tempering generally reduces hardness/strength, but improves toughness. Aging martensite is done for a group of ...
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### What are the design difference of a steel tank that would withstand 136atm inside and 1atm ambient compared to 1atm inside and 136atm ambient?

It's the difference between holding up a weight by by hanging it from a cable vs. putting it on top of a column. A tank that starts out round (ideally, if it starts out spherical) and is pressurized ...
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### Can I weaken a coil spring consisting of spring steel?

By "strength" do you mean stiffness/modulus? The modulus does not change with tensile or yield strengths. Make it with wire of 1/2 the diameter for 1/2 the modulus. Acid will hydrogen stress crack ...
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### Could a bolt this size actually be used on a project?

From my location it appears the image is broken, however I can assume with my imagination and the comments it’s a pretty big bolt. Exceptionally large bolts are surprisingly not that uncommon. They ...

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

The lower flanges resists a downward bending force that puts tensile stress on the lower flanges. Removing a short section of the lower flange lowers its bending strength but because of the very short ...
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### Is it possible to determine how the steel was made, having its microstructure (for example, to distinguish forging from rolled products)?

Steels are usually considered "as cast" or wrought. The microphotograph is overetched and either high magnification or coarse grained , likely had a heat-treatment. Cast or wrought would be ...
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