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Date: Fri, 02 Dec 2005 21:52:24 -0500
From: Ernest Christley <echristley@nc.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: fuel/brake lines
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wrjjrs@aol.com wrote:

> Jim,
>  5052 isn't actually sold in a -T0. It is a different type of material 
> than 6061-T0. 5052 is chemically aged and hardened for sheet metal and 
> is typically fairly soft. It can be purchased annealed, and this would 
> be correct for brake and fuel lines as you mention. I just mention 
> this as a T-0 is a temper designation not normally used on 5052.  The 
> common 5052 used for sheet metal is 5052-H32. FWIW
> Bill Jepson 
>  
> -----Original Message-----
> From: James Maher <deltaflyer@prodigy.net>
>
> The actual designation is 5052-0.
> The -0 is important as it designates the hardness which is very soft 
> (annealed).
> Tubing for brake and fuel lines needs to be soft so it can be bent and 
> formed easily.
>
It's not -T0, Bill, but Jim is on the money with -0. 

http://www.aircraftspruce.com/catalog/mepages/alumtube_5052.php

I think someone sat down one day and brainstormed up new and impressive 
ways to make it more confusing.

-- 
This is by far the hardest lesson about freedom. It goes against
instinct, and morality, to just sit back and watch people make
mistakes. We want to help them, which means control them and their
decisions, but in doing so we actually hurt them (and ourselves)."