European steel alloys

Sounds like something vendor specific. Not a standard spec.

Nick

I just googled for EST.460 and found a single source: A Porsche Fan Forum. They were talking about a roll bar. :-))

Have a look here (search for 460):

Maybe you can contact the poster and ask him where he got the tube from. I bet he can talk English.

Nick

Sounds like the tensile strength is 460 N/mm^2. That may give you an indication as to what you're looking at - see if it matches the tensile strength of 4130, for instance.

-- Alright, I just did the math and it looks like the tensile strength of annealed 4130 is about 550N/mm^2. You're looking for a material with a tensile strength of about 67,000 psi... I think...

Regards,

Robin

If that dummy who asked for a quote would have written StE 460, I would have told you that it is:

You find a comparison table here:

HTH, Nick

Must be something going around, the EST.460 spec came from a Porche aftermarket supplier. In German.

The request came from a Porche owner who wanted to upgrade his rollbar with a used one from a friend. The club race tech committee is populated with lawyers (and NOT engineers !!???) who want documentation. I've fought the "or equivlent" battles with other tech committees but at least those were engineers that could make an informed decision.

Sounds like the bar in question is going to be something like 67kpsi yield. This would be ok for the application but I'm certainly not going to reccomend it based on the info I've seen so far. The drivers use the term "wadding up" to describe the ultimate use for the bar. I tend to be somewhat fussy on this stuff.

Thanks for the help and translation.

Nick Müller wrote:

You have read my other posting? It is not EST.460, it must be StE 460 I gave you specs in other standards. It is used for tubes. In the Porsche-group (note the spelling of Porsche) the tube was describe as seamless drawn.

Yes, lawyers are challenged.

Nick

I saw the other post, looked up as much as I could. I have a fair amount of experience in tube specs in the US (Buying 4,000,000 feet a year of mixed tube sizes and materials) but none to European specs. For this application, I want to see the manufacturer say "this is xxx" spec" and I know what it is. If they said "4130 in normalized condition to SAE 513 Type 5" (which is what I suspect the roll cage is made of) I'd be perfectly happy. Pointers to and translations of specs is great but random conversation in any NG just doesn't cut it.

I see I spelled Porsche wr> RoyJ wrote:

So, have you called the person who wants to build this item to clarify the spec they want, and then called one of your main tube suppliers with the info to see what they say?

I'll make an educated guess that when you track down that 'StE 460' spec, it's a pretty close translation of the 'SAE 513 Type 5' spec written for USA'n roll bars and cages. In other words, 4130.

The reason I'm saying this is they would want complimentary specs in the protective equipment - bring a US built race car to Europe, or vice versa, without having to rip out the US-spec roll cage (that is usually an integral part of the chassis) and install one that meets the European standards, and reverse the process when they bring it home.

The specs must be written properly - where else can you watch someone stuff a car into a concrete `wall at 200 MPH while upside-down and spinning, and literally walk away from the crash...?

Try that in your family car sometime - On second thought, don't.

-->--

So you are blaming me for the specs of two other people? I gave you several different specs, and if your dealer can't do anything with 1.8901 or S460N better change him. And if you can't google your standards, better get offline and order another 1219,2 km of tube.

Nick