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reinforcing steel yield strength

reinforcing steel yield strength

reinforcing steel yield strength

(OP)
What is the yield strength of grade 60 reinforcing steel?

RE: reinforcing steel yield strength

Uh....that would be 60 ksi, thus Grade "60".

RE: reinforcing steel yield strength

Ron, the answer is good, but only this morning I had to search the internet as I had some bolts at 700MPA and some at 80ksi and didn't know whether they were equivalent. I prefer metric and if non-metric I need conversion tables.

RE: reinforcing steel yield strength

Zambo...fair point.  I shouldn't have been so flippant.  My apologies to rittz.

RE: reinforcing steel yield strength

http://www.mydiscounttools.com/estore/articles/conversions.html#hard

Some good conversion tables on there

 Grade                                   Tensile and Yield Strengths
  Metric    English          Tensile Strength      Min. Yield Strength    Min. Yield Strength
   Value     Value                (MPa)                   (MPa)                   (ksi)
----------------------------------------------------------------------------------------------
    300       40                   500                     300                     40
    400       60                   600                     400                     60
---------------------------------------------------------------------------------------------

 

RE: reinforcing steel yield strength

The metric equivalent for grade 60 reinforcing is grade 420, not 400 as listed in the posted table.  400 results in less than 60,000 psi yield strength.  

RE: reinforcing steel yield strength

CTW is correct - but when AASHTO/ASTM convert English to Metric it is not always a soft conversion (exact).  ASTM/AASHTO designate it as Grade 420.  As an aside - they did do an exact in compressive strengths of concrete in the past - when they required the results to be rounded to the nearest 79 kPa. Mmmmm

RE: reinforcing steel yield strength

rittz - I recently looked at some Australian rebar which is 500MPa.  After reading the literature, I noticed that some terminology is different.  I'm not convinced that 500MPa is what we in the US call yield or something different.  

On a similar note, Sx in Australian literature is not section modulus- Zx is section modulus.

My point, read the fine print and consider a language barrier even if still English, and rittz had a good question.

RE: reinforcing steel yield strength

In Canada, Grade 60 (Imperial) or Grade 400 (metric) indicates a guaranteed yield of 60 ksi or about 414 MPa (metric).  The fabricators here ensure the more severe standard, i.e. 60 ksi is attained.  But engineers designing in metric, use 400 MPa.  It is a soft conversion and makes very little difference to the final result.  

BA

RE: reinforcing steel yield strength

jsdpe,

Australian grade 500 bars are 500 MPa yield, at least that is what we use in design.  Before we switched over to 500MPa, we had 410 MPa (about Grade 60).

You are correct, Z and S are reversed.  In Australia, Z is elastic section modulus, S is plastic section modulus.  You call Z "zee", Aussies call it "zed".  Many words spelled with "zee" in US are spelled with "ess" in Australia.  I used to consider myself a good speller until I came to Australia, but now am always confused.   

RE: reinforcing steel yield strength

Yes the US is the only country I know of that uses the Z and S that way around, the UK uses the same as Australia.

That is at least for this year it does, next year we are switching to the eurocodes with a completely different set of european letters with complicated annotations!  

RE: reinforcing steel yield strength

Hokie66,
I don't believe you; I thought the first two requirements of an engineer were
1) Love of beer
2) Bad at English or any language.

I wonder how you get on with our sporting past times?
 

When in doubt, just take the next small step.
 

RE: reinforcing steel yield strength

RE,

Got the first requirement covered.  As to the second one, I'm bad at any other language.

Actually watching the Cowboys-Bulldogs game at the moment.  I have come to like and understand the cricket, according to my wife because it is so slow.

RE: reinforcing steel yield strength

Well, we can complain about the specifics of our reinforcing, the units they are designated in, as well as the notations used, but none of this compares to the challenges faced when working in a "developping" nation.

Vietnam still uses turn of the century style reinforcing steels.  Each bar size has its own yield strength, and varying ductility levels.  I'm not entirely convinced they aren't still smelting by the Bessemer method!

Anyway, point being that we've got it pretty good.

Oh, and I had just started getting into the Cricket when I left NZ.  Another couple of years and I might very well have been willing to attend a Test Match!

Cheers,

YS

B.Eng (Carleton), P.Eng (Ontario), MIPENZ (Structural-New Zealand)
Working in Canada, and missing my adoptive New Zealand family... at least I brought the little Kiwi with me!

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