I'm currently designing a valve and have been told to use the the B31.3 standard.  I have to use a material that will withstand high pressures, but is magnetically soft.  My question relates to choosing a coded material.  The material will be subject to cyclic loading so I've been looking at the materials on page 28, 305.2.3.  I don't need help choosing a material so much as finding out the characteristics of these metals.  They are all ASTM materials, is there any way to find AISI materials that correspond to these?  I looked on MatWeb as someone suggested this in a previous post.
    I mostly need to see things like a thermal expansion coefficient, magnetic permeability, and the stress levels it can withstand.  I'm just curious if there is a way to find these things without purchasing the individual standards themselves.  I don't usually work with standards, please forgive me if I'm missing the big picture.
     One final question, ASME publishes a guide book to go along with B31.3, has anyone purchased this and was it useful?  Thanks in advance for any information.

You cannot specify a valve using only ASME B31.3.

ASME B31.3 is concerned only with the structural integrity of the valve and the compatablity with the piping system.

I suggest that you visit/talk with a valve(ball valve) website (perhaps VELAN or Typo/Flowserve)representative.

Tell him of your magnetic(??)and actuation requirements and he can give you a recommendation.

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