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Old 06-19-2012, 10:35 AM
eison eison is offline
Join Date: Jul 2007
Location: Irvine, CA
Posts: 28
Default Aluminum composition question ASTM B 308?

I have a local supplier that I can buy some angle stock from that is 6061 T6 the same size as what came with the kit to replace a small departure from plans that I made.

My only issue is that the new angle is ASTM is B308, but the angle that Van's shipped is B221.

Buying locally will save days and multiple shipping $$$$.

I have googled the ASTM's, but frankly I am striking out. The metal supplier says that he doesn't think there is a big difference, but.....

Does anyone out there have any knowledge to share?


Eric Ison
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Old 06-19-2012, 10:48 AM
Bob Kuykendall's Avatar
Bob Kuykendall Bob Kuykendall is offline
Join Date: Sep 2006
Location: Douglas Flat, CA
Posts: 589

If the alloy (6061) and temper (T6) are correct and the dimensions and fillet radius are correct, I can't see what difference the ASTM number makes.

Thanks, BOb K.
Bob Kuykendall
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Old 06-19-2012, 11:08 AM
scsmith scsmith is offline
Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,813
Default more specific?

It appears that the B221 specification covers a broad range of alloys and extrusion shapes and methods. It appears that the B308 specification is specific to 6061-T6 hot-extruded shapes.
So, it appears that you are OK.

I keep saying 'appears' because ASTM will only let me read the abstracts without subscribing (i.e. send money). But there seems to be enough information in the abstracts to infer what I said above.
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