Cam nitride

[1 Wild R/T]

If you're claiming that there is such a thing as "cast steel", what other components are made from it?[/QUOTE]

Actually Cast Cranks, third members & steering boxes are all cast steel...

 

[Kern Dog]

Then they differ from the composition of cast iron blocks and heads?

 

[zyzzyx]

Automobile Parts Casting | Sand Casting, Investment Casting & CNC Machining in China (castingquality.com)

 

[zyzzyx]

all of this material is cast steel and then it is forged.

 

[Kern Dog]

So they cast steel and THEN shape it to a a point where it is considered "Forged" ?
I admit, this is all new to me. I have not heard of "cast steel" ever before.

 

[1 Wild R/T]

They cast the steel close to the final shape, then while still cherry red it is pounded into shape and finally after it cools it gets machined...

The pounding of the casting aligns the grain structure of the steel greatly increasing the strength..

 

[Photon440]

Hang on....
I base some of my confusion on car related parts. I have heard of cast iron cranks and forged steel. I have seen cast iron 3rd member housings, steering box housings but then drop forged steering center links, idler arms and Pitman arms. NOW you're telling me that all along, there has been a process where a mold is formed and molten steel is poured into it to form a part?
I'm having a hard time seeing that.
If you're claiming that there is such a thing as "cast steel", what other components are made from it?

As experienced by working on the railroad, I can attest that these major castings are cast steel, not cast iron. Easily torch cut and welded on, too.

 

[beanhead]

So they cast steel and THEN shape it to a a point where it is considered "Forged" ?
I admit, this is all new to me. I have not heard of "cast steel" ever before.

The cast 440 cranks were cast steel, even though most folks on the 'net refer to them as either 'cast' or 'steel'.

 

[Kern Dog]

Okay....So were most other cast cranks in other engines cast iron or steel? Chevy, Ford, etc?

 

[1 Wild R/T]

Okay....So were most other cast cranks in other engines cast iron or steel? Chevy, Ford, etc?

Steel or Nodular Iron..

 

[Kern Dog]

Okay...There is another one...."Nodular Iron".
I've heard of it in terms of the Ford 9 inch 3rd member housing....What the heck is that?

 

[1 Wild R/T]

Okay...There is another one...."Nodular Iron".
I've heard of it in terms of the Ford 9 inch 3rd member housing....What the heck is that?

From Google

Nodular iron is also called ductile iron. The graphite is present as tiny balls or spheroids. Because the spheroids interrupt the matrix much less than graphite flakes, nodular cast iron has higher strength and toughness than gray cast iron.

 

[beanhead]

I'd always been told by my chevy pals that the nodular cranks were a step up in strength from cast iron. How much truth there is in that, I can't say for sure..

 

[1 Wild R/T]

Far as I know I believe Buick was the only company to use true cast iron cranks... And they were known to fail.... Most cast cranks are steel or nodular iron...

 

[Kern Dog]

I think it is great to learn new things.

 

[zyzzyx]