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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Best material to prevent stainless steel wire abrasion (polyamide coated)

I have a 1.5mm diameter wire that must be pulled against the corner of a surface. The wire is made of stainless steel and coated with polyamide. What is the ideal material to make corner of the ...
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Identification of Martensite, Tempered Martensite and Bainite

Through SEM analysis, it's difficult to differentiate between the different phases present in the material (e.g. Martensite - BCT, Bainite - {BCC and Cementite: orthorombic}). Can anyone explain how ...
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Iridium carbides in high carbon stainless steel

Has there ever been any high carbon stainless steel made with iridium as one of the alloy components? Is there any research in this direction? There is a paper from 2016 comparing various iridium ...
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What is the difference between AISI 1015 and SAE 1015 steel? Are they the same?

I've been trying to understand the differences between the AISI and SAE naming systems, but haven't been able to completely figure it out yet. It seems like sometimes they are considered the same, but ...
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Steel retaining wall

Hi im doing a DIY project which need to build 30cm height retaining wall to hold up some gravels for an above ground pool 5000liter size 2.3x4m And the foundation pad area is 3x4m Im thinking to use ...
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One way locking mechanism linear movement

Sorry for the English in advance, it is not my native language :) I am working on a design which involves moving two steel plates in a horizontal linear motion together to clamp around a box. After ...
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How is load bearing capacity of a leg of steel angle calculated?

Suppose a section of steel angle is used to support a structural beam, which would otherwise have no available bearing, as in the following sketch. Assuming that appropriate connection/fixing on the ...
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How is the thickness of a steel plate underslung beneath a beam, to be calculated? (UK/EU)

A common way of providing bearing for concrete floor-beams above ground level, is to create a "slimflor" style steel element, comprising an "I" beam with a steel plate welded ...
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Max length of 12mm OD steel rod for CNC axis [closed]

Standard rod used for CNC guides, outer diameter: 12mm. Material: Ck55 steel, hardened to 60 HRC (according to store) What would be the maximum length I can have before the rod starts to bend? The ...
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Bolted connection moment resistance

I'm reading the Steel Construction Institute book Moment-resisting joints to Eurocode 3. In chapter 2, bolted beam to column connections using end plates are covered. For a connection with multiple ...
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Reinforced concrete by steel, poor durability, why?

I've been reading up about reinforced concrete, as it is one if not the cheapest way how to build (with some solid foundation). I found out that it actually has quite poor durability (50-100 years or ...
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The Cheapest Stainless Steel [closed]

I am going to make a spoon out of 80% iron and 20% chromium (by weight). If I slowly lower the temperature from about 1700C (at which all is melted) to room temperature, I believe it will finish as a &...
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How thick must a concrete or block wall be to withstand hydrostatic pressures up to three meters' height?

I'm planning a basement 3.6m depth, ~0.5m of which extended above ground surface level, in a deep clay/alluvial terrain (bedrock inaccessible). Torrential rainfall during rainy season saturates the ...
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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 ...
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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
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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 ...
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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 ...
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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. ...
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11 votes
9 answers
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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 ...
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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), ...
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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 ...
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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 ...
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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 ...
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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 ...
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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, ...
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2 votes
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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)?

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) ...
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2 votes
1 answer
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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 ...
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1 vote
1 answer
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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 ...
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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 ...
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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 ...
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1 vote
1 answer
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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 ...
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19 votes
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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 ...
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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 ...
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2 votes
1 answer
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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 ...
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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.
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1 vote
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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?
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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 ...
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2 votes
1 answer
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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 ...
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1 vote
1 answer
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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. ...
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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. ...
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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 ...
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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 ...
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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?
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