crankshaft material ?

[cessna]

Hi I am building a four cyl four cycle boxer type engine. My question is will 1045 steel work for the crank, I generally use 4140 but was given a length of 1045. Thanks for any input you can offer.
Terry

 

[stevehuckss396]

Hi I am building a four cyl four cycle boxer type engine. My question is will 1045 steel work for the crank, I generally use 4140 but was given a length of 1045. Thanks for any input you can offer.
Terry

Most builders use 1144 stress proof.