Re: how strong is steel?

I guess this question has to be answered by an structural engineer or a metallurgist who have done extensive studies on metal.

But if you want another sound answer, you can also Google it and find out the difference between tensile strength and yielding strength of steel. These has a very wide scope and needs to be studied and understood properly. 😉

Re: how strong is steel?

hmmm... so the best answer is to 'over engineer' 🙂

Re: how strong is steel?

Oh boy, hehe…

There’s a reason that civil and structural engineers have jobs.
It’s not a matter of opening a book, finding a single formula and a strength of a
given type of steel, and then applying it to a real-world problem, and I’ll show
you why, by using your own hypothetical problem: You want to support the
weight of two sacks of rice on a single steel post, right?

That means a compressive load of 100-odd kg, or 220-odd pounds.
Mild steel has compressive strength of about 60 ksi, or 60,000 lbs per square inch,
which means that you only need a steel post with a cross-sectional area of .003
square inch, or 2.3 sq.mm. That’s a little thinner than a #14 wire!

But wait.

You didn’t specify how tall the post would be.
Obviously a post so thin would buckle if it were of any substantial length, and that
buckling involves bending, which involves compression on one side of the “bend”,
and tension on the other, just like a beam. You have to consider bending moduli,
the tensile strength of the same mild steel, and a bunch of other issues. Not fun.

Blunt skippy, seek out an SE, CE or an architect to do the computations, if you
want a precise answer. If the job is too small to justify hiring a professional to
prepare a structural design, you look at existing, successful installations that do
support the same load, and copy what was done with a factor of safety added.

You asked about weld strength.
Weld strength is expressed on the weld rod itself: the first 2 digits give you tensile
strength in ksi, so that a 6013 weld has a strength of 60,000 lbs per square inch
of weld (meaning if you cut a weld bead in section, every square inch of the weld
section can support 60k lbs.) or about the same as mild steel, which makes sense
because mild steel is often what you’ll be welding. How that strength is put to the
test returns us to a discussion of frames: the stresses imposed, thence transmitted
from one member in a frame to another.

Of course, the QUALITY of the weld matters a great deal.

JM2P, FWIW, TANSTAAFL

Re: how strong is steel?

nose bleed ako dito...hehehe

Re: how strong is steel?

Getting an structural engineer is your best and safest bet.

Re: how strong is steel?

nosebleed din ako! hehehe

Re: how strong is steel?

@ spyghost

Bro, can you be more specific on what kind or type of steel you are referring and where will you be using it.

I got some sort of answer with regards to " How strong is steel ? " from WikiAnswer and here is a copy of that.

Steel is very strong. Our society is built of concrete and steel. The world as we know it would not exist without steel. Are there any military aircraft carriers that are not built of steel? But there are some lighter materials out there. What that means is that if you use aluminum to make, say, a seatpost for a bicycle, you'll have to make a thicker one out of aluminum to make it as strong as a steel one, but the aluminum one will be lighter while being as strong as the steel one. There are always trade offs when designing and engineering things and considering what metal to use.
Think about the bottom bracket on a bike with a 3-piece crank set. The axle is steel, or maybe titanium (same strength, but less weight - and more $'s!). Loads are so high here that this critical component is not made of aluminum 'cause it isn't tough enough to handle the stresses put on the part. And steel is the metal of choice for ball and roller bearings, particularly ones that take lots of abuse. Ceramics and carbide are harder, but they're more brittle, and can shatter under severe loading. It is most unusual to see bearings made out of something other than steel.
There are a couple of ways of measuring the strength of a metal, but the numbers don't make sense unless you compare one metal to another. Additionally, steel comes in many different alloy forms, and their characteristics will vary. Throw in the different techniques used to harden or otherwise heat treat the steel and you'll be here all day talking about how strong steel is. Yield strength and tensile strength of steel are, in general, pretty high, though. Steel is tough and strong.

Hope this helps !

Ahhh... I remember my engineering mechanic days... 🙂

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