Today's Message Index:
----------------------
 
     1. 02:20 PM - Heating after the bend (PoconoJohn2)
     2. 05:21 PM - Re: Heating after the bend (danoliver)
     3. 05:53 PM - Re: Heating after the bend (PoconoJohn2)
     4. 08:06 PM - Re: Heating after the bend (taildrags)
 
 
 

Message 1


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Time: 
02:20:14 PM PST US
Subject: 
Heating after the bend
From: 
"PoconoJohn2" <redroof@protonmail.com>
      
      
      I made a 90 degree bend in several pieces of 4130 .090. Am I supposed to heat them
      up to relieve stress? I feel like I heard that somewhere but no answer in
      Tony B's books or AC43.13-1B (or I missed it).
      
      Thanks!
      
      John C
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=495846#495846
      
      

Message 2


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Time: 
05:21:12 PM PST US
Subject: 
Re: Heating after the bend
From: 
"danoliver" <danoliver909@gmail.com>
      
      
      I sure hope not. I made all my bends cold per BHP.
      
      --------
      Dan O
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=495849#495849
      
      

Message 3


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Time: 
05:53:56 PM PST US
Subject: 
Re: Heating after the bend
From: 
"PoconoJohn2" <redroof@protonmail.com>
      
      
      Same here. I never pre-heated anything (except tubing to squish the ends), but
      for these 90 degree bends, just curious. I'm not worried about the small bends
      on wire fittings and such.
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=495850#495850
      
      

Message 4


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Time: 
08:06:28 PM PST US
Subject: 
Re: Heating after the bend
From: 
"taildrags" <taildrags@hotmail.com>
      
      
      Dan: the question was about bending 4130.  If I remember correctly, the fittings
      in the BHP plans and narrative are all mild steel.  Google searching on stress-relieving
      4130 seems to indicate that that treatment is used after welding,
      not bending, and that thin-wall (under about 0.120") doesn't need stress relieving.
      
      However, I am not a welder or steel fabricator, so I'm just repeating what I've
      found online.
      
      --------
      Oscar Zuniga
      Medford, OR
      Air Camper NX41CC &quot;Scout&quot;
      A75 power, 72x36 Culver prop
      
      
      Read this topic online here:
      
      http://forums.matronics.com/viewtopic.php?p=495854#495854
      
      








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