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Re: C-1030, C-1035, and C-4140 steel

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>suspect that it might be an SAE
>material spec
Correct. These are chemistry only specifications and not suitable for 
structural design. 1030 is low/medium carbon steel 1035 is slightly 
higher carbon and 4140 is alloy steel which needs to be heat treated to 
develop strength. 

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


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