Stronger than steel? Not hardly.
I found internet hype sites claiming 28ksi and 52ksi (!!!) tensile strengths, but this was the only thing online that looked credible to me:

http://www-classes.usc.edu/engr/ce/334/2002_10.ppt
Result: 11 - 15 ksi

whereas 4130 has a tensile strength of around 90-95 ksi in a normalized condition.