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Re: SE Grassroots Effort at Change (WAS: Field welding)

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On Sep 9, 2005, at 3:59 PM, Neil Moore wrote:

But the problem was that I didn't know anything about these kinds of special steels in 1966.
That was the year I also learned about trade names. Someone made the mistake of specifying T-1 instead of SA-517F, We got T-1 alright, but it was T-1 heat treated to a 321 BHN, normally used for bull-dozer blades. No toughness whatsoever. The only way we found out was when the tool used to make weld qualification bend tests broke. It turned out to be a very expensive error. Now I don't sign drawings with material trade names called out. If there ain't no ASTM spec (with minimum mechanicals), it ain't no structural material.

I feel the same way about welding. If there ain't no qualified procedure and a welder who shows he'll follow it, it ain't welding.

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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