4130 vs 4135 steel

[DANNY]

Looking at some parts and the 2 diff Mfg. One uses 4130 the other 4135. Is the 4135 that much better for the extra cost?

Thanks !!

[RRR_Products]

Looking at some parts and the 2 diff Mfg. One uses 4130 the other 4135. Is the 4135 that much better for the extra cost? Thanks !! Higher in Carbon and the ability to be hardened more when heat treated. Tensile strength is the same.

[72Dubya]

For future reference, the last two digits in a steel coding number is the percent carbon in the type of steel. So the 4135 has 5% more carbon than the 4130. More carbon in a casting to a degree can be hardened more.

Just to ramble on... the first digit stands for the type of metal used in the casting, in this case, 4 stands for Moly, if I am remembering the info right. The second digit is amount of substances in casting that can change the steel attributes.