Bull_in_a_china_shop

iTrader: (1)

cranks, rods etc, just wondering

Christos

I'm pretty sure, but not positive. Perhaps someone else will chime in.

MeentSS02

iTrader: (11)

Maybe I'm out in left field here, but forging is a process. The 4340 part is a code of the different materials (and what they are) that are present in the metal. Someone jump in here if I'm wrong...

GuitsBoy

iTrader: (4)

Make up your own mind:

http://www.suppliersonline.com/propertypages/4340.asp

Notice it specifies temperatures for forging... I would agree with MeentSS02.

12secSS

iTrader: (30)

4340 is a code for the type of steel and the amount of carbon content it contains. 43 is the steel used, 40 means it contains .40% carbon.

Forged is a process where cold (or hot) steel is compressed via hydraulic (or high pressure) to form a piece out of bar stock. Usually they start with a big block of metal for making a connecting rod (for example).

So no, not all 4340 is forged, it can be machined as well. Machined is not as strong as forged.