When it comes to cranks and rods, what exactly tod 4340 mean??

[caseywan]

I know that crank and rods are realy good, forged pieces when they are 4340, but what exactly does that number mean?

 

[steadfastcrew]

I know that crank and rods are realy good, forged pieces when they are 4340, but what exactly does that number mean?

i believe 4340 is the type of material its made out of.. (ie: like sterling silver jewelry is '925")
4340 is the strong stuff.. hehe

 

[90_Red_LX]

i believe 4340 is the type of material its made out of.. (ie: like sterling silver jewelry is '925")
4340 is the strong stuff.. hehe

Yep, it's just a number assigned to the type of metal it is, which in this case is a grade of steel.

 

[f4fntm]

Uh... metals are pretty complicated. You're gonna have to do some reading. But yeah, 4340 is strong.

http://www.steelforge.com/infoservices/matoverview/mo_alloy_steel.asp