On Wednesday, December 28, 2016 at 8:43:58 AM UTC-5, Ignoramus22750 wrote:
On 2016-12-28, Martin Eastburn wrote:
To hot for mud :-)

I suspect the rods were marked - hole smaller than this - and flange ......

The company doesn't want to pound out another or 50% for mistakes.

Wrought iron not pouring. And the base must be a beast into the ground!
Not much bounce in the ground near by or anywhere.

I think "we" went into pouring the form and then machine out the final.

But cast is not as strong as forged, no?

i

That piece is not iron. It's steel. Of course, if you're a nitpicker, steel is a type of iron. d8-) Big pieces of wrought iron are very rare and have been for around a century.

Cast iron is strong in compression -- stronger than forged (wrought) iron. But, except for ductile iron and malleable, more or less, it's weaker in tension and it's very brittle. You would not open-die forge any ductile or malleable iron to the degree of this example. It's not up to that much hot working.

Again, though, that piece is steel. It's much stronger than wrought iron. The forging will make it a bit stronger, but casting steel is an iffy proposition, anyway.

--
Ed Huntress


Martin

On 12/27/2016 12:34 PM, Cydrome Leader wrote:
Ignoramus15685 wrote:
I cannot stop watching this video, nothing short of amazing

https://www.youtube.com/watch?v=r41dcYUvNLk

Clearly very smart people, forging with just forklifts and a huge drop hammer

I saw that yesterday, almost shared the link as well. It's a real ugly
operation until they machine the thing down. You can see calipers at one
point and the rest of the measuring seems to be with some sort of rod with
markings of some sort. My question is how consistent are those flanges
from the start of the shift to the end, or on a rainy day when they're
slipping in mud or anything like that.