Cast aluminum marked "G072"?

That was probably a part number rather than a alloy number. Most companies like to have a number so that they can track things, especially when there are several variations of a particular design.

-- Why isn't there an Ozone Hole at the NORTH Pole?

Maybe a stock or catalog number; it wasn't anything resembling a part, just a rough casting in the shape of a cylinder. The top of the pour was about 1/2" uneven.

Nice stuff, though. Should take some pics. I've now been asked to make a smaller/lighter one for the ladies' bell (oh, and a lower bell for the ladies).

If you shrink a steel band on a wooden maul it won't split.

A google on G072 aluminum turned up a cylinder head for a 229 GM V-6 engine. Wonder if it's part of one of those that someone didn't get melted down all the way -- or perhaps it was partly melted in a fire?

Well, we thought that too; the old one did go for 50 years, but it finally gave up in a spectacular manner. We were trying to avoid splinters, and based on testing, this aluminum deforms and doesn't fragment at the forces involved.

Besides, it was more fun to make 5 gallons of swarf.

Dave Hinz

Yup, that's the only thing I found that was even close-ish.

Nope, it's a clean casting. Probably a catalog number. Now a maul.

Billet!

I'll sneak away 'fore it hits.

You better move quick - some of those farm boys are _awfully_ big. We calibrated the thing with two of our biggest guys on the fire department. Between them they can hit it about 8 out of 10 times, which is about right. The goal is that if someone says it's impossible, we grab one of 'em, they ding it to show it's possible, and sell the guy more chances.

For the record, a drunk farmboy can make a hell of a dent in the turf when he misses with a hammer that size.

We've been giving out beer, on the theory that cigars don't impair the ability to ring the bell.