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RE: ASTM A513 Tubing

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A513 is an electric resistance welded mechanical tube, and is manufactured
from a wide variety of steel material grades that may either be a carbon
steel or an alloy steel.

I do not know what the T5 indicates.  Carbon contents vary from 0.08 to
0.66.  Weldability and ductility may be a big issue.  Have them submit the
heats.  The welding may have to be qualified, and should be tested.  I would
not use it if it is part of a frame requiring ductility.

Harold Sprague

> -----Original Message-----
> From:	Nicholas Blackburn [SMTP:nblackburn(--nospam--at)]
> Sent:	Monday, April 24, 2000 2:35 PM
> To:	'seaint(--nospam--at)'
> Subject:	ASTM A513 Tubing
> Importance:	High
> A contractor is requesting a substitution of ASTM A513 for ASTM A500-GrB
> structural steel tubing.  Does anyone have any information on the use of
> A513 for structural purposes and whether there are any welding and
> ductility issues to look out for.  The mill cert. states that fy=86.5ksi
> and fu=97.3ksi and lists the steel as A513-97 T5.  The tube in question
> is 7" diameter 1/2" sidewall with a proposed full pen. weld splice at
> 2/3H.  The design is driven by deflection criteria not stresses.
> Thanks
> Nicholas Blackburn, PE
> nblackburn(--nospam--at)