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.
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.
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
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.
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.
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.
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!
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!
