Re: Expansion coefficient and Modulus of Elastic

>In ASME B31.3 to find the above properties for regular material is easy.
>I have problem in determining the above mechanical properties for some high
>alloy, where the chemical composition is outside the range listed in the
>code.
>Is there any guide or resources that I can use for solving my above problem?
I'm assuming you're aware that you can't use materials for B31.1 systems that aren't covered in the spec. Nor should you, since you won't know proper allowables and you won't be code compliant. Materials specified for code use are subject to a great deal of testing to determine statistically valid minimum properties and the effects of fabrication and service environment. If you try to adapt your own materials to the code, you're probably going to get yourself fired for designing a system that can't be stamped or at worst, you'll get someone killed, possibly yourself.

The web is littered with materal information of all sorts which can help you with non-Code applications. Most of it is useful, but incomplete for one reason or another. Be on the lookout for possible effects of production variables, or terms like typical properties or corrosion resistances which aren't guaranteed. Tradenames mean nothing. Monel or T-1 for example, are trade names, not material types, except in the vaguest sense which is a totally inadequate way to specify materials. There are a number of different grades of Monel and T-1 with widely varying properties, product forms and heat treatments. Simply specifying Monel pipe could get you any one of the different grades, including exactly the wrong grade for your service or production facility, and you'd have no recourse. I've been through this a number of times, and it isn't very pretty.

Christopher Wright P.E.    |"They couldn't hit an elephant at
chrisw@skypoint.com        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)