Since I'm not getting much response from Technet on this one I'll post it
here and see what happens.

----------
> From: Steve Collins <[log in to unmask]>
> To: TechNet <[log in to unmask]>
> Cc: [log in to unmask]
> Subject: Barrel Cracking 
> Date: Wednesday, February 25, 1998 8:37 AM
> 
> Is the temperature called out in IPC-TM-650 2.6.8 specific to FR-4?
> 
> Is this test valid for Composite material such as MC-3D material from
> Glassteel Industrial Laminates?
> 
> What is the reason for specifying 550°C temperature?
> 
> What kind of acceleration factors or failure rates can been expected from
> this test?
> 
> If test is run at 475°C to 500°C and boards pass test what kind of life
> expectancy can be expected Vs testing at 550°C?
> 
> Is this test designed to be a destructive test for composite materials?
> 
> Steve Collins
> 
> 
> 
> 

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